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D3E800B7D9E-Generic Scan Tool

Audi A4 B6 workshop Manual

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0% found this document useful (0 votes)

103 views216 pages

D3E800B7D9E-Generic Scan Tool

Audi A4 B6 workshop Manual

Uploaded by

jensenvk

We take content rights seriously. If you suspect this is your content, claim it here.

Available Formats

Download as PDF, TXT or read online on Scribd

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Service

Repair Manual
Audi A4 2005 ➤ Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

Generic Scan Tool permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

Engine ID AUK BKH

Edition 11.2014

Service Department. Technical Information

Service
List of Workshop Manual Repair Groups

Repair Group
ST - Generic Scan Tool
20 - Fuel Supply
24 - Multiport Fuel Injection
26 - Exhaust System, Emission Controls
28 - Ignition/Glow Plug System
38 - Automatic Transmission - Gears, Hydraulic Controls

Technical information should always be available to the foremen and mechanics, because their
careful and constant adherence to the instructions is essential to ensure vehicle road-worthiness and
safety. In addition, the normal basic safety precautions for working on motor vehicles must, as a
matter of course, be observed.

All rights reserved.

No reproduction without prior agreement from publisher.

Copyright © 2015 Audi AG, Ingolstadt D3E800B7D9E

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Contents

ST - Generic Scan Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1 On Board Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Generic Scan Tool Manual Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 OBD Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Malfunction Indicator Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.4 CAN-Bus Data Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Electronic Power Control Warning Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Diagnostic Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Diagnostic Mode 01 - Read Current System Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Diagnostic Mode 02 - Read Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Diagnostic Mode 03 - Read DTC Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Diagnostic Mode 04 - Erase DTC Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions . . . . . . . . . . . . 8
2.6 Diagnostic Mode 07 - Read Faults Detected During the Current or Last Driving Cycle . . . . 20
2.7 Diagnostic Mode 08 - Request Control of On-Board System, Test or Component . . . . . . 20
2.8 Diagnostic Mode 09 - Read Vehicle Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3 General Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4 Readiness Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Engine DTC Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1 Engine Control Module J623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Transmission DTC Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.1 Transmission Control Module , 09L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

20 - Fuel Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
1 Fuel Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
1.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
1.2 Clean Working Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
1.3 Fuel System, Bleeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
1.4 Fuel Pump Delivery Quantity, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
1.5 Fuel Pump Electrical, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
2 EVAP System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
2.1 EVAP System, Leak Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
2.2 EVAP System, Checking for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
2.3 EVAP
permitted Canister
unless authorisedPurge
by AUDIRegulator
AG. AUDI AG does Valve, Checking
not guarantee or accept. any
. . liability
............................. 101
2.4 Leak
with Detection
respect Pump,
to the correctness Checking
of information . . . . . .Copyright
in this document. . . . . . by
. .AUDI
. . .AG.
............................ 104
3 Electronic Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
3.1 Throttle Position Sensor/Accelerator Pedal Position Sensor 2, Checking . . . . . . . . . . . . . . 107

24 - Multiport Fuel Injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

1 Fuel Injection System, Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
1.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
1.2 Clean Working Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
1.3 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
2 Components, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
2.1 Oxygen Sensor Heaters before Catalytic Converter, Checking . . . . . . . . . . . . . . . . . . . . . . 112
2.2 Oxygen Sensor Heater after Catalytic Converter, Checking . . . . . . . . . . . . . . . . . . . . . . . . 115
2.3 Throttle Valve Control Module, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
2.4 Engine Speed Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
2.5 Intake Air Temperature Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
2.6 Engine Coolant Temperature Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
2.7 Fuel and Residual Pressures before High Pressure Pump, Checking . . . . . . . . . . . . . . . . 131
2.8 Fuel Pressure Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Contents i
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2.9 Low Fuel Pressure Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

2.10 Fuel Metering Valve, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
2.11 Intake Manifold Tuning Valve Position Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . 142
2.12 Intake Manifold Runner Position Sensor 2, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
2.13 Intake Manifold Runner Control Valve, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
2.14 Intake Manifold Runner Position Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
2.15 Fuel Injectors, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
2.16 Intake System, Checking for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
3 Functions, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
3.1 Heated Oxygen Sensors before Catalytic Converter, Checking . . . . . . . . . . . . . . . . . . . . 159
3.2 Oxygen Sensors after Catalytic Converter,
Protected by copyright. CopyingChecking . . . . . .purposes,
for private or commercial . . . . .in.part
. . or. in
. .whole,
. . . is. not
....... 162
4 Engine Control Module .with . .respect
. . . . to. the
. . correctness
. . . . . . .of.information
. . . . . .in. this
. . document.
. . . . . .Copyright
. . . . . by. .AUDI
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
. . .AG.
......... 166
4.1 ECM Voltage Supply, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
4.2 ECM, Removing and Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
5 Additional Signals, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
5.1 Speed Signal, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
5.2 Brake Light and Brake Pedal Switches, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
5.3 Can-Bus Terminal Resistance, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

26 - Exhaust System, Emission Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

1 Exhaust System Components, Removing and Installing . . . . . . . . . . . . . . . . . . . . . . . . . . 177

28 - Ignition/Glow Plug System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

1 Ignition System, Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
1.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
1.2 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
1.3 Spark Plug Test Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
1.4 Camshaft Position Sensors, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
1.5 Camshaft Adjustment Valve, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
1.6 Knock Sensors, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
1.7 Ignition Coils with Power Output Stage, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

38 - Automatic Transmission - Gears, Hydraulic Controls . . . . . . . . . . . . . . . . . . . . . . 195

1 Transmission Regulating Electrical Components, Checking . . . . . . . . . . . . . . . . . . . . . . . . 195
1.1 Multi-Function Transmission Range Switch, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
1.2 Transmission Input Speed Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
1.3 Transmission Output Speed Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
1.4 Transmission Fluid Temperature Sensor, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
1.5 Solenoid Valve 1, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
1.6 Automatic Transmission Pressure Regulating Valves, Checking . . . . . . . . . . . . . . . . . . . . 201
2 Transmission Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
2.1 Transmission Control Module Voltage Supply, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . 203
2.2 Transmission Control Module, Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
3 CAN-Bus Terminal Resistance, TCM to ECM, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . 206
4 Continuously Variable Transmission, Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

ii Contents
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

ST – Generic Scan Tool

1 On Board Diagnostic
(Edition 11.2014)
⇒ “1.1 Generic Scan Tool Manual Contents”, page 1
⇒ “1.2 OBD Systems”, page 1
⇒ “1.3 Malfunction Indicator Lamp”, page 1
⇒ “1.4 CAN-Bus Data Link”, page 2
⇒ “1.5 Electronic Power Control Warning Lamp”, page 2

1.1 Generic Scan Tool Manual Contents

”GST” is an acronym for Generic Scan Tool.
Included in the contents of this GST manual is a summary table
of the vehicle specific OBD II Emission Related Engine and
Transmission DTCs. This table contains all necessary Malfunc‐
tion Criteria, Threshold Values, Secondary Parameters, Enabling
Conditions, Monitoring Time Length, Frequency of Checks, and
MIL Illumination to accurately monitor and diagnose the Engine
Emissions and Transmission and perform all functions required
to run Modes 01 through 09 with a hand held scan tool. For a
further description of the monitor strategies, a document refer‐
ence has been provided throughout this GST manual to the
applicable OBD System Strategy document.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
This GST manual also authorised
permitted unless contains by the
AUDI step byAG
AG. AUDI stepdoespin point test
not guarantee or accept any liability
procedures towith
accurately diagnose the suspected component or
respect to the correctness of information in this document. Copyright by AUDI AG.

system once a DTC has been set. All references to repair proce‐
dures and wiring diagrams will be found within the diagnostic test
procedure.

1.2 OBD Systems

OBD II
”OBD” is an acronym for the On Board Diagnostic System.
California OBD II applies to all gasoline engine vehicles up to
14,000 lbs. Gross Vehicle Weight Rating (GVWR) starting in the
1996 MY and all diesel engine vehicles up to 14,000 lbs. GVWR
starting in the 1997 MY.
Several states in the Northeastern United States have chosen to
adopt the California emission regulations starting in the 1998 MY
and are known as "Green States".
Green States receive California-certified vehicles for passenger
cars and light trucks up to 6,000 lbs. GVWR. Starting in the 2004
MY, Federal vehicle over 8,500 lbs. will start phasing in OBD II.
Starting in 2004 MY, gasoline-fueled Medium Duty Passenger
Vehicles (MDPVs) are required to have OBD II. Federal OBD II
applies to all gasoline engine vehicles up to 8,500 lbs. GVWR
starting in the 1996 MY and all diesel engine vehicles up to 8,500
lbs. GVWR starting in the 1997 MY.
OBD II system implementation and operation is described in the
remainder of this document.

1.3 Malfunction Indicator Lamp

”MIL” is an acronym for the Malfunction Indicator Lamp.

1. On Board Diagnostic 1
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

If the ECM recognizes a malfunction that leads to increased emis‐

sions values, it indicates them by lighting the MIL which is located
in the instrument cluster.
The ECM switches on the MIL after the ignition is switched on.
Shortly after the engine is started, The MIL goes out if the ECM
does not detect a malfunction that increases the emissions val‐
ues.
If the ECM recognizes a malfunction that leads to increased emis‐
sions during the operation of the engine, the ECM switches on
the MIL and an entry is stored in the DTC memory of the ECM.

1.4 CAN-Bus Data Link

”CAN” is an acronym for Controller Area Network.
The ECM communicates with all databus capable control mod‐
ules by a CAN Data Link.
The databus capable control modules (i.e. Engine Coolant tem‐
perature Sensor) are connected by two data bus wires which are
twisted together (CAN_High and CAN_Low), and exchange in‐
formation (messages) to the ECM. Missing information on the
databus is then recognized and stored as a malfunction.
The ECM illuminates the MIL through the CAN data link and tells
the MIL to turn on, turn off, or blink.

1.5 Electronic Power Control Warning Lamp

”EPC” is an acronym that stands for the Electronic Power Control
(E-gas).
The ECM monitors all EPC components after the ignition is
switched on.
If a malfunction is recognized in the EPC system during the op‐
eration of the engine, the ECM switches on the EPC which is
located in the instrument cluster and an entry is stored in the DTC
memory of the ECM.

2 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2 Diagnostic Modes
⇒ “2.1 Diagnostic Mode 01 - Read Current System Data”,
page 3
⇒ “2.2 Diagnostic Mode 02 - Read Operating Conditions”,
page 5
⇒ “2.3 Diagnostic Mode 03 - Read DTC Memory”, page 6
⇒ “2.4 Diagnostic Mode 04 - Erase DTC Memory”, page 7
⇒ “2.5 Diagnostic Mode 06 - Read Test Results for Specific Di‐
agnostic Functions”, page 8
⇒ “2.6 Diagnostic Mode 07 - Read Faults Detected During the
Current or Last Driving Cycle”, page 20
⇒ “2.7 Diagnostic Mode 08 - Request Control of On-Board Sys‐
tem, Test or Component”, page 20
⇒ “2.8 Diagnostic Mode 09 - Read Vehicle Information”,
page 22
The information provided in Modes 01 through 09 displays the
various levels of emission related data that may be monitored, as
well as the ability to retrieve and read stored DTC trouble codes ,
erase stored DTC trouble codes, generate readiness codes, and
select the various PIDs and Test-IDs used within the modes to
monitor the engine, and emission related component parameters.
The following table provides a link to all diagnostic modes that
monitor all components and systems which influence the emis‐
sion quality.

Protected by Note
copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

Depending on scan tool and protocol used, the information dis‐

with respect to the correctness of information in this document. Copyright by AUDI AG.

played may be referred to by different names such as Test-ID

(TID), Hex-ID, Component-ID (CID), On-Board Diagnostic Moni‐
tor Identifier (OBDMID), or contain no name at all and be refer‐
enced by only a number.

2.1 Diagnostic Mode 01 - Read Current Sys‐

tem Data
Diagnostic Mode 01 makes it possible to access current emis‐
sions-related measured values and diagnostic data. The original
measured values (no replacement values), input and output data
and system status information are displayed using Diagnostic
Mode 1.
Test requirement
• Coolant temperature at least 80° C.
Procedure
– Connect the diagnostic tester.
– Start the engine and run at idle.
– Select “Diagnostic Mode 1: Obtain data.”.
– From the following table, select the desired the “PID” that is to
be monitored, e.g. “PID 05-Coolant temperature”.

2. Diagnostic Modes 3
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

More than one “PID” may be selected and monitored.

The current values of the component or system that is being

monitored will be displayed on the diagnostic tester screen.
PID Component or System
01: Monitoring status since erasing DTC memory
03: Condition of fuel system
04: Calculated load condition value
05: Coolant temperature
06: Short term gasoline-air ratio bank 1
07: Gasoline-air ratio bank 1
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
12: Engine
permitted unless rotations
authorised by AUDI per minute
AG. AUDI AG does (RPM)
not guarantee or accept any liability
13: Vehicle speed
with respect to the correctness of information in this document. Copyright by AUDI AG.

14: Ignition timing adjustment at 1. cyl. in direction

15: Intake air temperature (IAT)
16: Air flow quantity at Mass Air Flow (MAF) sensor
17: Throttle valve position (absolute)
19: Existing oxygen B1 to B2-S2 to (exist./nonexist.)
21: Bank 1 - sensor 2
28: OBD request is designed for diagnostic of this vehicle
31: Time after engine on
33: Driven distance after MIL on
35: Fuel Rail Pressure
46: Commanded Evaporative Purge
48: Number of warm ups since diagnostic trouble codes
49: Distance since diagnostic trouble codes cleared
51: Barometric Pressure
52: Bank 1 - sensor 1
56: Bank 2- sensor 1
60: Catalyst Temperature Bank 1, Sensor 1
65: Monitor status this driving cycle
66: Control module voltage
67: Absolute Load Value
68: Commanded Equivalence Ratio
69: Relative Throttle Position
70: Ambient air temperature
71: Absolute Throttle Position B
73: Accelerator Pedal Position D
74: Accelerator Pedal Position E
76: Commanded Throttle Actuator Control

– Switch the ignition off.

– End of diagnosis.

4 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2.2 Diagnostic Mode 02 - Read Operating

Conditions
When an emissions-related fault (pending DTC, visible in mode
07) is first detected, operating conditions are stored. Mode 02
makes it possible to access this freeze frame data as soon as this
fault is shown in mode 03. Each control module only shows freeze
frame data for one fault via mode 02. Therefore, there are two
priority levels. If there is a malfunction with higher priority, the
freeze frame data is overwritten.
– Fault with higher priority: Misfire malfunction or fuel trim mal‐
function.
– Fault with normal priority: All other emissions-related faults.
Procedure
– Connect the diagnostic tester.
– Start the engine and run at idle.

Note

If the engine does not start, crank the engine using starter for at
least 5 seconds, do not switch the ignition off afterward under any
circumstances.

– Select “Diagnostic Mode 2: Obtain operating conditions.”.

– From the following table, select the desired the “PID”, e.g. “PID
05-Coolant temperature” that is to be monitored.

Note

More than one “PID” may be selected and monitored.

The current values of the component or system that is being

monitored will be displayed on the diagnostic tester screen.
PID Component or System
02: DTC which triggered the current reception of all control module information
03: Condition of fuel system
04: Calculated load condition value
05: Coolant temperature
06: Short term gasoline-air ratio bank 1
07: Gasoline-air ratio bank 1
12: Engine rotations per minute (RPM)
13: Vehicle speed
14: Ignition timing adjustment at 1. cyl. in direction
15: Intake air temperature (IAT)
16: Air stream amount at Mass Air Flow (MAF) sensor
17: Throttle valve position (absolute)
31: Time after engine on
35: Fuel Rail Pressure
46: Commanded Evaporative Purge
51: Barometric Pressure
66: Control module voltage
67: Absolute Load Value

2. Diagnostic Modes 5
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

PID Component or System

68: Commanded Equivalence Ratio
69: Relative Throttle Position
70: Ambient air temperature
71: Absolute Throttle Position B
73: Accelerator Pedal Position D
74: Accelerator Pedal Position E
76: Commanded Throttle Actuator Control

– Switch the ignition off.

– End of diagnosis.

2.3 Diagnostic Mode 03 - Read DTC Mem‐

ory
Diagnostic Mode 03 makes it possible to read emissions-related
faults (confirmed DTCs: faults which have activated the MIL) in
the ECM and in the TCM.
When the Engine Control Module (ECM) recognizes an emission
related fault it turns on the Malfunction Indicator Lamp (MIL) or if
a Electronic Throttle Malfunction is recognized, the Engine Con‐
trol Module (ECM) turns on the Electronic Power Control (EPC)
Warning Lamp which are both located in the instrument cluster.
Diagnostic Mode 03 is used to retrieve and view any DTC which
may be stored in the Engine Control Module (ECM) .
The DTC's are sorted by SAE code with the DTC tables consisting
of a 5-digit alpha-numeric value.
The following tables provide a breakdown and explanation of the
DTC code.
P-Codes
Component group
P x x x x DTC for the drivetrain
Norm-Code
P 0 x x x Trouble codes defined by SAE with specified
malfunction texts
P 1 x x x Additional emission relevant DTCs provided by
the manufacturer
P 2 x x x DTCs defined by SAE with specified texts, from
MY 2000
P 3 x x x Additional emission relevant DTCs provided by
the manufacturer from MY 2000
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

Component group
Repair group
P x 0 x x Fuel and air mixture and additional emission reg‐
ulations
P x 1 x x Fuel and air ratios
P x 2 x x Fuel and air ratios
P x 3 x x Ignition system
P x 4 x x Additional exhaust system

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Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

P x 5 x x Speed and idle control

P x 6 x x Control module and output signals
P x 7 x x Transmission
P x 8 x x Transmission
P x 9 x x Control modules, input and output signals

U-Codes
Component group
U x x x x DTC for network (CAN bus)
Norm-Code
U 0 x x x Trouble codes defined by SAE with specified
malfunction texts

Interrogating Fault Memory

Procedure
– Connect the diagnostic tester.
– Switch the ignition to the “ON” position.
– Select “Diagnostic Mode 03: Interrogating fault memory ”.
– The stored DTC or DTC's will be displayed on the diagnostic
tester screen.
The following table is an example of the DTC information that may
be displayed on the diagnostic tester screen:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Indication example Explanation
P0444 SAE Diagnostic Trouble Code (DTC)
Evaporative Emission (EVAP) Canister Purge Reg‐ Malfunctioning wiring path or malfunctioning component
ulator Valve
Circuit Open Malfunction type as next

– Refer to the following DTC tables for the diagnostic repair pro‐
cedure:
♦ ⇒ “5.1 Engine Control Module J623 ”, page 26 .
– Switch the ignition off.
– End of diagnosis.

2.4 Diagnostic Mode 04 - Erase DTC Mem‐

ory
Diagnostic Mode 04 makes it possible to erase the DTC memory
and to reset all emissions-related diagnostic data. In that way, all
faults in the DTC memory in the ECM and TCM are erased. The
adaptation values may also be reset.
Emissions-related diagnostic data includes (as applicable):
♦ - MIL Status
♦ - Number of DTCs
♦ - Readiness Bits
♦ - Confirmed DTCs

2. Diagnostic Modes 7
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

♦ - Pending DTCs
♦ - DTC that belongs to freeze frame
♦ - Freeze frame data
♦ - Test results of specific diagnostic functions
♦ - Distance driven with “MIL ON”
♦ - Number of Warm-Up Cycles after erasing the DTC memory
♦ - Distance driven after erasing the DTC memory
♦ - Misfire counter
Procedure
– Connect the diagnostic tester.
– Switch the ignition to the “ON” position.
– Select “Diagnostic Mode 03: Interrogating fault memory ”.
– Then select “Mode 4: Reset/delete diagnostic data”.
The diagnostic tester will display: “Diagnostic data are being
erased”.
– Switch the ignition off.
– End of diagnosis.

2.5 Diagnostic Mode 06 - Read Test Results

for Specific Diagnostic Functions
Diagnostic Mode 06 makes it possible to retrieve test results for
special components and systems which are continuously or not
continuously monitored. If the diagnosis of a system is complete,
the diagnostic result
Protected and theCopying
by copyright. corresponding thresholds
for private or commercial are
purposes, saved
in part or in whole, is not
and displayed in mode 06. This data remains saved (even with
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

the ignition off) until either new diagnostic results become avail‐
with respect to the correctness of information in this document. Copyright by AUDI AG.

able or the DTC memory is erased.

The values of the individual test results must reach the specified
value or must be within the min. and max. limits.

Note

Depending on diagnostic tester and protocol used, the informa‐

tion displayed in diagnostic mode 06 may be referred to by
different names such as Test-ID (TID), Hex-ID, Component-ID
(CID), or On-Board Diagnostic Monitor Identifier (OBDMID).

Test requirements
• Exhaust system must be properly sealed between catalytic
converter and cylinder head .
• No DTCs in the DTC memory.
• Coolant temperature at least 80° C.
Work procedure
– Connect the diagnostic tester.
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select the desired “Test-ID”.

8 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

The current minimum and maximum values will be displayed on

the diagnostic tester screen.
Test-ID (Hex-ID) Component or System
01 ($01): ⇒ page 9 Oxygen Sensor Monitor Bank 1 - Sensor 1
02 ($02): ⇒ page 9 Oxygen Sensor Monitor Bank 1 - Sensor 2
05 ($05): ⇒ page 10 Oxygen Sensor Monitor Bank 2 - Sensor 1
06 ($06): ⇒ page 11 Oxygen Sensor Monitor Bank 2 - Sensor 2
33 ($21): ⇒ page 12 Catalyst Monitor Bank 1
34 ($22): ⇒ page 12 Catalyst Monitor Bank 2
$3A (58): ⇒ page 13 Fuel Tank EVAP System Leak Test (0.090“)
59 (3B): ⇒ page 13 EVAP Monitor (0.40)
60 (3C): ⇒ page 13 EVAP Monitor (0.20)
61 (3D): ⇒ page 14 Purge Flow Monitor
65 ($41): ⇒ page 14 Oxygen Sensor Heater Monitor Bank 1 - Sensor 1
66 ($42): ⇒ page 15 Oxygen Sensor Heater Monitor Bank 1 - Sensor 2
69 ($45): ⇒ page 15 Oxygen Sensor Heater Monitor Bank 2 - Sensor 1
70 ($46): ⇒ page 16 Oxygen Sensor Heater Monitor Bank 2 - Sensor 2
162 ($A2): ⇒ page 16 Mis-Fire Cylinder 1 Data
163 ($A4): ⇒ page 17 Mis-Fire Cylinder 2 Data
164 ($A4): ⇒ page 17 Mis-Fire Cylinder 3 Data
165 ($A5): ⇒ page 18 Mis-Fire Cylinder 4 Data
166 ($A4): ⇒ page 18 Mis-Fire Cylinder 5 Data
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
167 ($A7): ⇒ page 19
with respect to the Mis-Fire
correctness Cylinder
of information 6 DataCopyright by AUDI AG.
in this document.

Test-ID 01 ($01): Oxygen Sensor Monitor Bank 1 - Sensor 1.

– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 01 ($01)”.
– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
131 ($83) P0133 Response Check. For additional infor‐ --- 0.205 Refer to DTC P0133 in
mation, refer to the Siemens Simos 6 the DTC table
OBD System Strategy. Page 19. ⇒ page 36 .

– If any component or system fails to meet the specified values,

2. Diagnostic Modes 9
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Start the engine and let run at idle speed.

– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 02 ($02)”.
– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
01 ($01) — Voltage barrier from rich to lean (fixed 708 mV 708 mV —
value) Oxygen sensor behind cat.,
bank 1 . For additional information,
refer to the Siemens Simos 6 OBD
System Strategy. Page 19.
02 ($02) — Voltage barrier from lean to rich (fixed 708 mV 708 mV —
value) Oxygen sensor behind cat.,
bank 1. For additional information, re‐
fer to the Siemens Simos 6 OBD Sys‐
tem Strategy. Page 19.
07 ($07) — Minimum sensor voltage in this driv‐ 1.0 V 5V —
ing cycle Oxygen sensor behind cat.,
bank 1. For additional information, re‐
fer to the Siemens Simos 6 OBD Sys‐
tem Strategy. Page 19.
08 ($08) — Maximum sensor voltage in this driv‐ 0V 0.009 V —
ing cycle Oxygen sensor behind cat.,
bank 1. For additional information, re‐
fer to the Siemens Simos 6 OBD Sys‐
tem Strategy. Page 19.
129 ($81) P0136 Signal activity check. For additional 0.542 V 5V Refer to DTC P0136 in
information, refer to the Siemens Si‐ the DTC table
mos 6 OBD System Strategy. Page ⇒ page 36 .
19.
130 ($82) P0136 Signal activity check. For additional 0V 1.039 V Refer to DTC P0136 in
information, refer to the Siemens Si‐ the DTC table
mos 6 OBD System Strategy. Page ⇒ page 36 .
19.
131 ($83) P0136 Fuel cut off Check. For additional in‐ 0V 200.0 mV Refer to DTC P0136 in
formation, refer to the Siemens Simos the DTC table
6 OBD System Strategy. Page 19. ⇒ page 36 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

– If any component or system fails to meet the specified values,

10 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Test-ID (TID) DTC Component or System Min. Max. Additional Information

(Hex-ID)
131 ($83) P0153 Response Check. For additional in‐ --- 0.205 Refer to DTC P0153 in
formation, refer to the Siemens Simos the DTC table
6 OBD System Strategy. Page 19. ⇒ page 37 .

– If any component or system fails to meet the specified values,

refer to Diagnostic “Mode 03: Interrogating Fault Memory” to
check for stored DTC's or the corresponding diagnostic repair
procedure .
– Switch the ignition off.
– End of diagnosis.
Test-ID 06 ($06): Oxygen Sensor Monitor Bank 2 - Sensor 2.
– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 06 ($06)”.
– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
01 ($01) — Voltage barrier from rich to lean (fixed 708 mV 708 mV —
value) Oxygen sensor behind cat.,
bank 2 . For additional information,
refer to the Siemens Simos 6 OBD
System Strategy. Page 19.
02 ($02) — Voltage barrier from lean to rich (fixed 708 mV 708 mV —
value) Oxygen sensor behind cat.,
bank 2. For additional information, re‐
fer to the Siemens SimosProtected
6 OBDbySys‐copyright. Copying for private or commercial purposes, in part or in whole, is not
tem Strategy. Page 19. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
07 ($07) — Minimum sensor voltage in this driv‐ 1.0 V 5V —
ing cycle Oxygen sensor behind cat.,
bank 2. For additional information, re‐
fer to the Siemens Simos 6 OBD Sys‐
tem Strategy. Page 19.
08 ($08) — Maximum sensor voltage in this driv‐ 0V 0.009 V —
ing cycle Oxygen sensor behind cat.,
bank 2. For additional information, re‐
fer to the Siemens Simos 6 OBD Sys‐
tem Strategy. Page 19.
129 ($81) P0156 Signal activity check. For additional 0.542 V 5V Refer to DTC P0156 in
information, refer to the Siemens Si‐ the DTC table
mos 6 OBD System Strategy. Page ⇒ page 38 .
19.
130 ($82) P0156 Signal activity check. For additional 0V 1.039 V Refer to DTC P0156 in
information, refer to the Siemens Si‐ the DTC table
mos 6 OBD System Strategy. Page ⇒ page 38 .
19.
131 ($83) P0156 Fuel cut off Check. For additional in‐ 0V 200.0 mV Refer to DTC P0156 in
formation, refer to the Siemens Simos the DTC table
6 OBD System Strategy. Page 19. ⇒ page 38 .

2. Diagnostic Modes 11
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– If any component or system fails to meet the specified values,

Check. For additional information, re‐ the DTC table

fer to the Siemens Simos 6 OBD Sys‐ ⇒ page 55 .
tem Strategy. Page 3.

– If any component or system fails to meet the specified values,

refer to Diagnostic “Mode 03: Interrogating Fault Memory” to
check for stored DTC's or the corresponding diagnostic repair
procedure .
– Switch the ignition off.
– End of diagnosis.

12 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

$3A (58): Fuel Tank EVAP System Leak Test (0.090“).

– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 59 ($3B)”.
– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
129 ($81) P0455 Tank leak test: Large leak. For addi‐ 700 ms — Refer to DTC P0455 in
tional information, refer to the Sie‐ the DTC table
mens Simos 6 OBD System Strat‐ ⇒ page 57 .
egy. Page 10.

– If any component or system fails to meet the specified values,

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

refer to Diagnostic “Mode 03: Interrogating Fault Memory” to in this document. Copyright by AUDI AG.
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information
check for stored DTC's or the corresponding diagnostic repair
procedure .
– Switch the ignition off.
– End of diagnosis.
Test-ID 59 (3B): EVAP Monitor (0.040).
– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 59 ($3B)”.
– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
129 ($81) P0442 Tank leak test: Small leak (1.0 mm). 1210 — Refer to DTC P0442 in
For additional information, refer to ms the DTC table
the Siemens Simos 6 OBD System ⇒ page 56 .
Strategy. Page 10.

– If any component or system fails to meet the specified values,

2. Diagnostic Modes 13
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Select “Test-ID 60 ($3C)”.

– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
130 ($82) P0456 Tank leak test: Small leak (0.5 mm). 4280 — Refer to DTC P0456 in
For additional information, refer to the ms the DTC table
Siemens Simos 6 OBD System Strat‐ ⇒ page 58 .
egy. Page 10.

– If any component or system fails to meet the specified values,

128 ($80) P0441 Function Check. For additional infor‐ 0 4.849% Refer to DTC P0441 in
with respect to the correctness of information in this document. Copyright by AUDI AG.

mation, refer to the Siemens Simos 6 the DTC table

OBD System Strategy. Page 10. ⇒ page 56 .
130 ($82) — Function Check. For additional infor‐ 3.5% — —
mation, refer to the Siemens Simos 6
OBD System Strategy. Page 10.
131 ($83) — Function Check. For additional infor‐ 0.04 — —
mation, refer to the Siemens Simos 6
OBD System Strategy. Page 10.

– If any component or system fails to meet the specified values,

14 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Select the desired “Test-ID”.

– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Information
(Hex-ID)
133 ($85) P0135 Oxygen sensor heating in front of < 680° C > 860° C Refer to DTC P0135 in
catalytic converter, diagnosis, Bank the DTC table
1. For additional information, refer to ⇒ page 36 .
the Siemens Simos 6 OBD System
Strategy. Page 19.

– If any component or system fails to meet the specified values,

– Select the desired “Test-ID”.

– Check specified values at idle.

2. Diagnostic Modes 15
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Test-ID (TID) DTC Component or System Min. Max. Additional Informa‐

(Hex-ID) tion
129 ($81) P0141 Oxygen sensor heating behind cata‐ 0 ohms 43320 Refer to DTC P0141
lytic converter, diagnosis, Bank 1 ohms in the DTC table
Nernst cell internal resistance test. ⇒ page 37 .
For additional information, refer to the
Siemens Simos 6 OBD System Strat‐
egy. Page 19.

– If any component or system fails to meet the specified values,

refer to Diagnostic “Mode 03: Interrogating Fault Memory” to
check for stored DTC's or the corresponding diagnostic repair
procedure .
– Switch the ignition off.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

– End of diagnosis.
with respect to the correctness of information in this document. Copyright by AUDI AG.

Test-ID 70 ($46): Oxygen Sensor Heater Monitor Bank 2 - Sensor

2.
– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 70 ($46)”.
– Select the desired “Test-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Informa‐
(Hex-ID) tion
129 ($81) P0161 Oxygen sensor heating behind cata‐ 0 ohms 43320 Refer to DTC P0161
lytic converter, diagnosis, Bank 2 ohms in the DTC table
Nernst cell internal resistance test. ⇒ page 39 .
For additional information, refer to the
Siemens Simos 6 OBD System Strat‐
egy. Page 19.

– If any of the components or systems fail to meet the specified

16 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
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Test-ID (TID) DTC Component or System Min. Max. Additional Infor‐

(Hex-ID) mation
11 ($0B) P0301 Burn misfire cylinder 1 average value 0 65535 Refer to DTC
over 10 driving cycles. For additional (counts) P0301 in the DTC
information, refer to the Siemens Si‐ table ⇒ page 48 .
mos 6 OBD System Strategy. Page 5.
12 ($0C) P0301 Burn misfire cylinder 1 during this 0 65535 Refer to DTC
driving cycle. For additional informa‐ (counts) P0301 in the DTC
tion, refer to the Siemens Simos 6 table ⇒ page 48 .
OBD System Strategy. Page 5.

– If any of the components or systems fail to meet the specified

values, refer to Diagnostic “Mode 03: Interrogating Fault Mem‐
ory” to check for stored DTC's or the corresponding diagnostic
repair procedure .
– Switch the ignition off.
– End of diagnosis.
Test-ID 163 ($A4): Mis-Fire Cylinder 2 Data.
– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 163 ($A4)”.
– Select the desired “Test-ID (TID)” or “Hex-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Informa‐
(Hex-ID) tion
11 ($0B) P0302 Burn misfire cylinder 2 average val‐ 0 65535 Refer to DTC
ue over 10 driving cycles. For addi‐ (counts) P0302 in the DTC
tional information, refer to the Sie‐ table ⇒ page 49 .
mens Simos 6 OBD System
Strategy. Page 5.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
12 ($0C) P0302 Burn misfire cylinder 2 duringpermitted
this unless authorised
0 65535
by AUDI AG. AUDI AG Refer toguarantee
does not DTC or accept any liability
driving cycle. For additional infor‐
with respect to the correctness (counts)
of information inP0302 in the
this document. DTCby AUDI AG.
Copyright
mation, refer to the Siemens Simos table ⇒ page 49 .
6 OBD System Strategy. Page 5.

– If any of the components or systems fail to meet the specified

2. Diagnostic Modes 17
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Check specified values at idle.

Test-ID (TID) DTC Component or System Min. Max. Additional Informa‐
(Hex-ID) tion
11 ($0B) P0303 Burn misfire cylinder 3 average val‐ 0 65535 Refer to DTC
ue over 10 driving cycles. For addi‐ (counts) P0303 in the DTC
tional information, refer to the Sie‐ table ⇒ page 49 .
mens Simos 6 OBD System
Strategy. Page 5.
12 ($0C) P0303 Burn misfire cylinder 3 during this 0 65535 Refer to DTC
driving cycle. For additional infor‐ (counts) P0303 in the DTC
mation, refer to the Siemens Simos table ⇒ page 49 .
6 OBD System Strategy. Page 5.

– If any of the components or systems fail to meet the specified

values, refer to Diagnostic “Mode 03: Interrogating Fault Mem‐
ory” to check for stored DTC's or the corresponding diagnostic
repair procedure .
– Switch the ignition off.
– End of diagnosis.
Test-ID 165 ($A5): Mis-Fire Cylinder 4 Data.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– Connect the diagnostic tester . unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
permitted
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 165 ($A5)”.
– Select the desired “Test-ID (TID)” or “Hex-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Informa‐
(Hex-ID) tion
11 ($0B) P0304 Burn misfire cylinder 4 average 0 65535 Refer to DTC P0304
value over 10 driving cycles. For (counts) in the DTC table
additional information, refer to the ⇒ page 50 .
Siemens Simos 6 OBD System
Strategy. Page 5.
12 ($0C) P0304 Burn misfire cylinder 4 during this 0 65535 Refer to DTC P0304
driving cycle. For additional infor‐ (counts) in the DTC table
mation, refer to the Siemens Si‐ ⇒ page 50 .
mos 6 OBD System Strategy.
Page 5.

– If any of the components or systems fail to meet the specified

18 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
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Select “Test-ID 166 ($A4)”.

– Select the desired “Test-ID (TID)” or “Hex-ID”.
– Check specified values at idle.
Test-ID DTC Component or System Min. Max. Additional Informa‐
(TID) tion
(Hex-ID)
11 ($0B) P0305 Burn misfire cylinder 5 average 0 65535 Refer to DTC P0305
value over 10 driving cycles. For (counts) in the DTC table
additional information, refer to the ⇒ page 50 .
Siemens Simos 6 OBD System
Strategy. Page 5.
12 ($0C) P0305 Burn misfire cylinder 5 during this 0 65535 Refer to DTC P0305
driving cycle. For additional infor‐ (counts) in the DTC table
mation, refer to the Siemens Si‐ ⇒ page 50 .
mos 6 OBD System Strategy.
Page 5.

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
–withIfrespect
any of the
to the components
correctness or systems
of information failCopyright
in this document. to meet by the
AUDI specified
AG.
values, refer to Diagnostic “Mode 03: Interrogating Fault Mem‐
ory” to check for stored DTC's or the corresponding diagnostic
repair procedure .
– Switch the ignition off.
– End of diagnosis.
Test-ID 167 ($A7): Mis-Fire Cylinder 6 Data.
– Connect the diagnostic tester .
– Start the engine and let run at idle speed.
– Select “Mode 6: Check test the results of components that are
not continuously monitored”.
Select “Test-ID 167 ($A7)”.
– Select the desired “Test-ID (TID)” or “Hex-ID”.
– Check specified values at idle.
Test-ID (TID) DTC Component or System Min. Max. Additional Informa‐
(Hex-ID) tion
11 ($0B) P0306 Burn misfire cylinder 6 average 0 65535 Refer to DTC P0306
value over 10 driving cycles. For (counts) in the DTC table
additional information, refer to the ⇒ page 51 .
Siemens Simos 6 OBD System
Strategy. Page 5.
12 ($0C) P0306 Burn misfire cylinder 6 during this 0 65535 Refer to DTC P0306
driving cycle. For additional infor‐ (counts) in the DTC table
mation, refer to the Siemens Si‐ ⇒ page 51 .
mos 6 OBD System Strategy.
Page 5.

– If any of the components or systems fail to meet the specified

2. Diagnostic Modes 19
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2.6 Diagnostic Mode 07 - Read Faults De‐

tected During the Current or Last Driving
Cycle
Mode 07 makes it possible to check emissions-related faults
which appeared during the current or last driving cycle (pending
DTCs).
A pending DTC is saved the first time a fault is detected (output
via Mode 07).
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– If the fault is detected
with again
respect to the by the
correctness end ofinthe
of information this following driving
document. Copyright by AUDI AG.
cycle, a confirmed DTC is entered (output via Mode 03) and
the MIL is activated.
– If this malfunction is not detected again by the end of the fol‐
lowing driving cycle, the corresponding pending code will be
deleted at the end of the driving cycle.

Note

Depending on scan tool and protocol used, some of the informa‐

tion provided may be referred to by a different name.

Procedure
– Connect the scan tool.
– Start the engine and run at idle.

Note

If the engine does not start, crank the engine using starter for at
least 5 seconds. Do not switch the ignition off afterward.

– Select “Mode 7: Check test results of components that are

continuously monitored”.
The number of pending DTCs or “0 malfunctions detected” will be
displayed on the scan tool screen.
– Refer to the following DTC tables for the diagnostic repair pro‐
cedure:
♦ ⇒ “5.1 Engine Control Module J623 ”, page 26 .
– Switch the ignition off.

2.7 Diagnostic Mode 08 - Request Control

of On-Board System, Test or Compo‐
nent
Diagnostic Mode 08 is used to control the operation of an on-
board system, test or component. A Mode 8 service can be used
to turn on-board system ON or OFF, or to cycle an on-board sys‐
tem, test or component ON or OFF for a specific period of time.
The service can also be used to request system status or to report
test results.
Diagnostic Mode 08, TID $01
Diagnostic Mode 08, TID $01 is used to determine if the evapo‐
rative system may be leaking.
Depending on the scan tool being used, the function test in Di‐
agnostic Mode 08 may or may not be able to be performed.

20 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

If the scan tool being used will operate Diagnostic Mode 08, per‐
form the test below ⇒ page 21 .
If the scan tool being used will not operate Diagnostic Mode 08,
refer to ⇒ page 100 .

Note

Always follow the manufacturers instructions for the scan tool be‐
ing used.

Test requirements
• No DTCs stored in the DTC memory.
• Intake Air Temperature (IAT) maximum 60° C.
• Coolant temperature 80 -110° C.
• Throttle valve angle 12.0 - 16.0%.
Function test Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Note

If the accelerator pedal is depressed during the test, the test will
be aborted.

– Connect the scan tool.

– Start the engine and run at idle for at least 15 minutes.
– Select “Diagnostic Mode 08 - Tank Leak Test”.
– Select “ Tank Leak Test”.
– Check the specified value of the tank leak test at idle.
– The following may be displayed on the scan tool screen:
Tank leak test Specified value
♦ Test function active Test OK
♦ Test function is being initiated, please
wait
♦ Test off
♦ Test aborted

– Switch the ignition off.

If the specified result is obtained:
System OK.
If the specified result is not obtained:
– Repeat the tank leak test, switch the ignition off and start the
engine again and let run for 15 minutes at idle.
– Switch the ignition off.
If the specified result is again not obtained:
– A leak may be present. Refer to ⇒ page 100 .

2. Diagnostic Modes 21
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

End of diagnosis.

2.8 Diagnostic Mode 09 - Read Vehicle In‐

formation
Diagnostic Mode 09 makes it possible to access vehicle-specific
information from the ECM and the TCM (where applicable).

Note

Depending on scan tool and protocol used, Diagnostic Mode 09

and the information provided may be referred to by a different
name.

Test requirement
• No DTCs stored in the DTC memory.
Procedure
– Connect the diagnostic tester.
– Switch the ignition on.
– Select “Mode 09:byVehicle
Protected information”.
copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Select the desired “Test-ID”.
with respect to the correctness of information in this document. Copyright by AUDI AG.

– The information requested will be displayed on the diagnostic

tester screen.
The following table is a numerical list of all“Test-IDs” that may be
selected.
Test-ID Diagnostic text
02: Vehicle identification number e.g.
♦ A different 17 digit number will be displayed for
each vehicle

04: Calibration identification e.g.

♦ Engine Control Module (ECM)

♦ Transmission Control Module (TCM)

06: CVN (check sum) e.g.

♦ EC5AE460 the check sum is different for every
control module version

♦ 000D105

– Switch the ignition off.

– End of diagnosis.

22 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

3 General Diagnosis
The following table provides quick links to all chapters in this sec‐
tion.
Preliminary Check
Before performing any pin point test or component diagnosis, a
preliminary check must be performed.
Check the Technical Bulletins for information that may supersede
any information included in this manual.
– Connect the scan tool.
– Switch the ignition on.
– Using the scan tool, check for any stored or related DTC's.
If other DTC's are stored:
– Repair these DTC's first before performing the following pro‐
cedure.
If no other DTC's are stored:
– Using the scan tool, erase the DTC memory. Refer to
⇒ page 7 .
– Perform a road test to attempt to duplicate the customers
complaint.
If the DTC returns:
– Perform the diagnostic procedure.
If the DTC does not return:
– The fault is intermittent or a sporadic condition may exist.
– Check the suspected component, electrical harness and elec‐
trical harness connectors for damage, corrosion, loose or
broken terminals.
– If necessary, repair the faulty wiring connection.
– Perform a road test to verify the repair.
If the DTC returns:
– Perform the diagnostic procedure.
If the DTC does not return:
The fault may have been the result of a loose electrical connec‐
tion.
– Generate readiness code. Refer to ⇒ page 24 .
– End of diagnosis.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

3. General Diagnosis 23
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

4 Readiness Code
Readiness Code Description
Diagnostics are performed at regular intervals during normal ve‐
hicle operation. After repairing an emissions related system, a
readiness code is generated by road testing the vehicle.
If a malfunction is recognized during the drive cycle, it will be
stored in the DTC memory.
The OBD drive cycle operation will be monitored with a hand held
diagnostic tool. Consult the manufacturer's instruction manual for
correct tool operation.
The readiness code is erased every time the DTC memory is
erased or any time the battery isProtected
disconnected. If the DTC
by copyright. Copying mem‐
for private or commercial purposes, in part or in whole, is not
ory has been erased or the battery is disconnected,
permitted unless authorised byaAUDI
new AG.read‐
AUDI AG does not guarantee or accept any liability
iness code must be generated. with respect to the correctness of information in this document. Copyright by AUDI AG.
Only erase the DTC memory if a DTC has been stored.
General Recommendations
Most monitors will complete easier and quicker using a “steady-
foot” and “smooth” acceleration during the drive cycle operation,
cruise, and acceleration modes.
Operating Conditions
For the EVAP monitor test, the coolant temperature and the am‐
bient air temperature must be between 10° C and 35° C with a
difference between them no greater than 4° C. The ambient air
temperature must not change more than 4° C during the drive
cycle procedure (e.g. when driving out of a heated workshop in
the winter).
Test requirements
• Erase the DTC memory.
• Coolant temperature must be between 80° C and 110° C.
• The Intake Air Temperature (IAT) must be between 10° C and
35° C.
• Battery voltage must be a minimum of 12.5 volts.
• Fuel tank level 1/4 to 3/4 full.

WARNING

When performing the drive cycle operation, pay strict attention

to driving conditions and please observe and obey all posted
speed limits. Failure to follow these instructions may result in
personal injury or possible death.

Drive Cycle Procedure

– Connect the diagnostic tester.
– Switch the ignition on and start the vehicle.
– Idle the vehicle for 2-3 minutes. This executes the O2S Heater,
Misfire, Secondary AIR, Fuel Trim, and Purge system moni‐
tors.
– Drive the vehicle at 45-55 mph for a continuous 7-minute pe‐
riod, avoid stopping. This executes the EVAP, O2S, Fuel Trim,
and Misfire monitors.
– Accelerate the vehicle to an engine speed of 5000 RPM (with
automatic transmission use the tip-tronic mode); lift off the

24 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

throttle until the engine speed is around 1200 rpm. This exe‐
cutes the fuel cut off
– Accelerate the vehicle smoothly to 60-65 mph, cruise con‐
stantly for 5 min, this executes the Catalyst; O2S, Misfire, Fuel
Trim, and Purge System monitors.
– Decelerate and idle the vehicle again for 3 minutes. This ex‐
ecutes the Misfire, Secondary AIR, Fuel Trim, and Purge
system monitors.
– Check the status of the readiness code.

Note

Depending on the diagnostic tester used. The readiness code

status may be displayed as complete, passed or OK.

– If any engine monitor fails the drive cycle test. Repeat the drive
cycle test until all engine monitors have successfully run
through and passed.

Note

When repeating the drive cycle operation for a failed EVAP mon‐
itor or thermostat-monitor, allow the engine to cool until the cool‐
ant temperature and the ambient air temperature are be between
10° C and 35° C with a difference between them no greater than
4° C is observed and repeat the drive cycle operation.

If the drive cycle operation fails again.

– Check the DTC memory for stored DTC's.
Repair the vehicle if necessary.
– Repeat the drive cycle operation until all engine monitors have
successfully run through and passed.
– Remove the diagnostic tester and switch the ignition off.
– End of operation.

4. Readiness Code 25
Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

5 Engine DTC Tables

♦ ⇒ “5.1 Engine Control Module J623 ”, page 26

5.1 Engine Control Module - J623-

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P000 Intake (A) – Check the • Protected
Signal • Engine
by copyright. Copying speed,
for private or commercial 1 Second
purposes, in part or •in whole,
Continu‐
is not
A Camshaft Camshaft Po‐ permitted
change, unless<authorised by
>700 rpmAUDI AG does not guarantee or accept any
AUDI AG. ousliability
Position sition (CMP) 10° CA to the correctness of information in this document. Copyright by AUDI AG.
with respect
Slow Re‐ Sensor - • Set point change • 2 DCY
sponse G40- . Refer • Number of behavior check,
Bank 1 to checks, 15 <3 °CA for 1.2
⇒ page 180 . sec.
• Set point change,
– Check the >15 °CA
Camshaft Ad‐
justment
Valve 1 -
N205- . Refer
to
⇒ page 183 .

– Check the En‐

gine Speed
(RPM) Sensor
- G28- . Refer
to
⇒ page 122 .
P000 Intake (B) – Check the • Signal • Engine speed, 1 Second • Continu‐
B Camshaft Camshaft Po‐ change, < >700 rpm ous
Position sition (CMP) 10° CA
Slow Re‐ Sensor 3 - • Set point change • 2 DCY
sponse G300- . Refer • Number of behavior check,
Bank 1 to checks, 15 <3°CA for 1.2
⇒ page 180 . sec.
• Set point change,
– Check the En‐ >15°CA
gine Speed
(RPM) Sensor
- G28- . Refer
to
⇒ page 122 .
P000 Intake (A) – Check the • Signal • Engine speed, 1 Second • Continu‐
C Camshaft Camshaft Po‐ change, < >700 rpm ous
Position sition (CMP) 10° CA
Slow Re‐ Sensor 2 - • Set point change • 2 DCY
sponse G163- . Refer • Number of behavior check,
Bank 2 to checks, 15 <3°CA for 1.2
⇒ page 180 . sec.
• Set point change,
– Check the >15°CA
Camshaft Ad‐
justment
Valve 2 -
N208- . Refer
to
⇒ page 183 .

– Check the En‐

gine Speed
(RPM) Sensor
- G28- . Refer
to
⇒ page 122 .

26 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P000 Intake (B) – Check the • Signal • Engine speed, 1 Second • Continu‐
D Camshaft Camshaft Po‐ change, < >700 rpm ous
Position sition (CMP) 10° CA
Slow Re‐ Sensor 4 - • Set point change • 2 DCY
sponse G301- . Refer • Number of behavior check,
Bank 2 to checks, 15 <3°CA for 1.2
⇒ page 180 . sec.
• Set point change,
– Check the En‐ >15°CA
gine Speed
(RPM) Sensor
- G28- . Refer
to
⇒ page 122 .
P0010 Intake (A) – Check the Signal current, Camshaft valve, 2 Seconds • Continu‐
Camshaft Camshaft Ad‐ > 0.8 mA commanded on ous
Position Ac‐ justment
tuator Cir‐ Valve 1 - • 2 DCY
cuit / Open N205- . Refer
(Bank 1) to
⇒ page 183 .
P0011 (A) Cam‐ – Check the • Adjustment • Engine speed 3 Seconds • Continu‐
shaft Posi‐ Camshaft Ad‐ Angle differ‐ 700 rpm ous
tion - Timing justment ence, > 12°
Over-Ad‐ Valve 1 - CA for more • Oil temperature • 2 DCY
vanced or N205- . Refer than 3 sec‐ 15 -130 °C
System to onds • Delta set point < 3
Perform‐ ⇒ page 183 . °CA, than wait 3 -
ance, Bank • Number of
checks, 3 6 seconds
1
times
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
P0013 B Camshaft – Check
with respect the of information
to the correctness Signal current, > Camshaft
in this document. Copyright by valve,
AUDI AG. 2 Seconds • Continu‐
Position Ac‐ Camshaft Ad‐ 0.8 mA Commanded on ous
tuator Cir‐ justment
cuit/Open, Valve 1 (ex‐ • 2 DCY
Bank 1 haust) -
N318- . Refer
to
⇒ page 183 .
P0014 B Camshaft – Check the • Adjustment • Engine speed 3 Seconds • Continu‐
Position - Camshaft Ad‐ Angle differ‐ 700 rpm ous
Timing justment ence, > 12°
Over-Ad‐ Valve 1 (ex‐ CA for more • Oil temperature • 2 DCY
vanced or haust) - than 3 sec‐ 15 -130 °C
System N318- . Refer onds • Delta set point < 3
Perform‐ to °CA, then wait 3 -
ance, Bank ⇒ page 183 . • Number of
checks, 3 6 seconds
1
times

P0020 Intake (A) – Check the Signal current, > Camshaft valve, 2 Seconds • Continu‐
Camshaft Camshaft Ad‐ 0.8 mA Commanded on ous
Position Ac‐ justment
tuator Cir‐ Valve 1 - • 2 DCY
cuit / Open N205- . Refer
(Bank 1) to
⇒ page 183 .

5. Engine DTC Tables 27

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0021 (A) Cam‐ – Check the • Adjustment • Engine speed 3 Seconds • Continu‐
shaft Posi‐ Camshaft Ad‐ Angle differ‐ 700 rpm ous
tion - Timing justment ence, > 12°
Over-Ad‐ Valve 1 - CA for more • Oil temperature • 2 DCY
vanced or N205- . Refer than 3 sec‐ 15 -130° C
System to onds • Delta set point <
Perform‐ ⇒ page 183 . 3° CA, than wait 3
ance, Bank • Number of
checks, 3 - 6 seconds
2)
times

P0023 B Camshaft – Check the Signal current, > Camshaft valve, 2 Seconds • Continu‐
Position Ac‐ Camshaft Ad‐ 0.8 mA Commanded on ous
tuator Cir‐ justment
cuit/Open, Valve 2 (ex‐ • 2 DCY
Bank 2 haust) -
N319- . Refer
to
⇒ page 183 .
P0024 B Camshaft – Check the • Adjustment • Engine speed 3 Seconds • Continu‐
Position - Camshaft Ad‐ Angle differ‐ 700 rpm ous
Timing justment ence, > 12°
Over-Ad‐ Valve 2 (ex‐ CA for more • Oil temperature • 2 DCY
vanced or haust) - than 3 sec‐ 15 -130° C
System N319- . Refer onds • Delta set point <
Perform‐ to 3° CA, than wait 3
ance, Bank ⇒ page 183 . • Number of
checks, 3 - 6 seconds
2
times

P0030 HO2S – Check the Heater current, • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ < 8 - 40 mA manded on onds ous
trol circuit, sor (O2S)
Bank 1 Sen‐ Heater - Z19- . • Duty cycle, 0.4 - • 2 DCY
sor 1 Refer to 99.6%
⇒ page 112 .
P0031 HO2S – Check the Heater voltage, • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ <1.9 - 2.22 V manded off onds ous
trol circuit sor (O2S)
low, Bank 1 Protected
Heater - Z19-Copying
by copyright. . • purposes,
for private or commercial Duty cycle,
in part or<in whole, is not • 2 DCY
Sensor 1 Refer to
permitted unless authorised by AUDI AG. AUDI AG does not 99.6%
guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
⇒ page 112 .
P0032 HO2S – Check the Heater current • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ >8 - 11 A manded off onds ous
trol circuit sor (O2S)
high, Bank Heater - Z19- . • Duty cycle, • 2 DCY
1 Sensor 1 Refer to >0.4%
⇒ page 112 .
P0036 HO2S – Check the Heater current, • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ < 8 - 40 mA manded on onds ous
trol circuit, sor (O2S)
Bank 1 Sen‐ Heater - Z29- . • Duty cycle, 0.4 - < • 2 DCY
sor 2 Refer to 99.6%
⇒ page 115 .
P0037 HO2S – Check the Heater voltage, • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ < 1.9-2.22 V manded off onds ous
trol circuit sor (O2S)
low, Bank 1 Heater - Z29- . • Duty cycle, • 2 DCY
Sensor 2 Refer to 99.6%
⇒ page 115 .

28 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0038 HO2S – Check the Heater current • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ bank 1, > 8-11 A manded off onds ous
trol circuit sor (O2S)
high, Bank Heater - Z29- . • Duty cycle, • 2 DCY
1 Sensor 2 Refer to >0.4%
⇒ page 115 .
P0040 02 Sensor – Check the Deviation lamb‐ Lambda control, ac‐ 50 Seconds • Continu‐
Signals oxygen sen‐ da tive ous
Swapped sors for swap‐ control
Bank 1 Sen‐ ping. • Sensor 1 Protected
> • 2 DCY
by copyright. Copying for private or commercial purposes, in part or in whole, is not
sor 1, Bank 24% and permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
2 Sensor 1 sensor 2 < with respect to the correctness of information in this document. Copyright by AUDI AG.
-24%
or
• Sensor 1 -<
24% and
sensor 2 >
24%

P0041 02 Sensor – Check the • Sensor 1 > • Mass air flow in‐ 50 Seconds • Continu‐
Signals oxygen sen‐ 0.830 V and tegrated, > 400 G ous
Swapped sors for swap‐ sensor 2 <
Bank 1 Sen‐ ping. 0.156 V • O2S rear, no oth‐ • 2 DCY
sor 2, Bank er faults
2 Sensor 2 or
• Sensor 1 < • O2S rear, closed
0.156 and loop
sensor 2 >
0.830 V

P0050 HO2S – Check the Heater current, • Heater, Com‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ < 8 - 40 mA manded on onds ous
trol circuit, sor (O2S)
Bank 1 Sen‐ Heater - Z19- . • Duty cycle, 0.4 - • 2 DCY
sor 1 Refer to 99.6%
⇒ page 112 .
P0051 HO2S – Check the Heater voltage, • Heater, comman‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ <1.9 - 2.22 V ded off onds ous
trol circuit sor (O2S)
low, Bank 1 Heater - Z19- . • Duty cycle, < • 2 DCY
Sensor 1 Refer to 99.6%
⇒ page 112 .
P0052 HO2S – Check the Heater current • Heater, comman‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ >8 - 11 A ded off onds ous
trol circuit sor (O2S)
high, Bank Heater - Z19- . • Duty cycle, • 2 DCY
1 Sensor 1 Refer to >0.4%
⇒ page 112 .
P0056 HO2S – Check the Heater current, • Heater, comman‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ < 8 - 40 mA ded on onds ous
trol circuit, sor (O2S)
Bank 1 Sen‐ Heater - Z29- . • Duty cycle, 0.4 - < • 2 DCY
sor 2 Refer to 99.6%
⇒ page 115 .
P0057 HO2S – Check the Heater voltage, • Heater, comman‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ < 1.9-2.22 V ded off onds ous
trol circuit sor (O2S)
low, Bank 1 Heater - Z29- . • Duty cycle, • 2 DCY
Sensor 2 Refer to 99.6%
⇒ page 115 .

5. Engine DTC Tables 29

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0058 HO2S – Check the Heater current • Heater, comman‐ 5.2 Sec‐ • Continu‐
Heater con‐ Oxygen Sen‐ bank 2, > 3–5 A ded off onds ous
trol circuit sor (O2S)
high, Bank Heater - Z30- . • Duty cycle, • 2 DCY
2 Sensor 2 Refer to >0.4%
⇒ page 115 .
P0068 MAP/MAF – – Check the In‐ Deviation throt‐ • Pressure quo‐ 3 Seconds • Continu‐
Throttle Po‐ take Air Tem‐ tle excitations tient, < 0.53 ous
sition Cor‐ perature (IAT) • <-43 or
relation Sensor - >43% • Time after engine • 2 DCY
G42- . Refer start, >70 sec‐
to • <-33 or onds
⇒ page 124 . >33%
• .Fuel cut off, Not
Deviation throt‐ active
– Check the in‐ tle exitations
take system • <-39 - >21% • Fuel trim activity,
for leaks or 2% <-23->23%
(false air). Re‐
fer to • <-40 - >28% • Pressure quo‐
⇒ page 157 . or 2% tient, < 0.63

P0069 Manifold – Check the In‐ Altitude sensor • Modeled pres‐ 3 Seconds • Continu‐
Absolute take Air Tem‐ signal sure ratio at throt‐ ous
Pressure perature (IAT) vs IM pressure tle < 0.05
(MAP) - Sensor - >27 kPa • 2 DCY
Barometric G42- . Refer or
Pressure to • Throttle position,
Correlation ⇒ page 124 . 28-81°
• Engine speed,
– Check the in‐ 600 - 4000 RPM
take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .
P0087 Fuel/Rail – Check the • Deviation • Fuel cut off, Not 5 Seconds • Continu‐
System Low Fuel fuel rail pres‐ active ous
Pressure - Pressure Sen‐ sure control,
Too Low sor - G410- . < 0.025 G • Engine speed, • 2 DCY
Refer to 640-3480 RPM
⇒ page 136 . • Deviation
lambda con‐ • Time after engine
trol, -10 – start, >250 sec‐
+10% onds
• High pressure
pump set point,
0.005-0.05 G
• Lambda control,
Closed loop
• EVAP canister
load, <25%
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
P0088 permitted
Fuel/Rail – Check
unless authorised by AUDIthe
AG. AUDI AG Actual
does notpressure, • Engine
guarantee or accept any liabilityspeed, 5 Seconds • Continu‐
System Low Fuel
with respect to the correctness of information in>13.5 PSI Copyright by AUDI
this document. 640-6000
AG. RPM ous
Pressure - Pressure Sen‐
Too High sor - G410- . • Time after engine • 2 DCY
Refer to start, >250 sec‐
⇒ page 136 . onds

30 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0089 Fuel Pres‐ – Check the Deviation fuel • Engine speed, 5 Seconds • Continu‐
sure Regu‐ Low Fuel pressure control 500-3000 RPM ous
lator 1 Per‐ Pressure Sen‐ (LP), < 28% -
formance sor - G410- . >35% • Time after engine • 2 DCY
Refer to start, >30 sec‐
⇒ page 136 . onds
• ECT, 70-95° C
• Delta fuel pres‐
sure low, 25 kPa
• Fuel cut off, Not
active

P0090 Fuel Pres‐ – Check the Signal voltage, < Camshaft valve, 2 Seconds • Continu‐
sure regula‐ Fuel pressure 3 V Commanded off ous
tor 1 Control and residual
Circuit pressure . Re‐ • 2 DCY
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
fer to permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
⇒ page 131 . with respect to the correctness of information in this document. Copyright by AUDI AG.

– Check the
Fuel Pressure
Sensor -
G247- . Refer
to
⇒ page 133 .
P0091 Fuel Pres‐ – Check the Signal current, Camshaft valve, 2 Seconds • Continu‐
sure regula‐ Fuel pressure >1 Amp Commanded on ous
tor 1 Control and residual
Circuit Low pressure . Re‐ • 2 DCY
fer to
⇒ page 131 .

– Check the
Fuel Pressure
Sensor -
G247- . Refer
to
⇒ page 133 .
P0094 Fuel Sys‐ – Check the Signal voltage, < Camshaft valve, 2 Seconds • Continu‐
tem Leak Fuel pressure 3 V Commanded off ous
Detected - and residual
Small Leak pressure . Re‐ • 2 DCY
fer to
⇒ page 131 .

– Check the
Fuel Pressure
Sensor -
G247- . Refer
to
⇒ page 133 .

5. Engine DTC Tables 31

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0095 Intake Air – Check the In‐ Signal current, Camshaft valve, 2 Seconds • Continu‐
Tempera‐ take Air Tem‐ >1 Amp Commanded on ous
ture Sensor perature (IAT)
2 Circuit Sensor - • 2 DCY
G42- . Refer
to
⇒ page 124 .

– Check the in‐

take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .
P0106 Manifold – Check the In‐ • Altitude sen‐ • Engine speed, 0 3 Seconds • Continu‐
Absolute take Air Tem‐ sor signal vs. RPM ous
Pressure/ perature (IAT) IM pressure,
BARO Sen‐ Sensor - >20 kPa • Time after engine • 2 DCY
sor Range/ G42- . Refer start, 0 sec.
Perform‐ to • boost pres‐
sure signal, • Throttle position,
ance ⇒ page 124 . 28-81°
>23 kPa
– Check the in‐ • Engine speed,
take system 600-4000 RPM
for leaks
(false air). Re‐
fer to
⇒ page 157 .
P0107 Manifold – Check the In‐ Signal voltage, < --- 2 Seconds • Continu‐
absolute take Air Tem‐ 0.2 V ous
pressure/ perature (IAT)
Barometric Sensor - • 2 DCY
pressure G42- . Refer
circuit low to
input ⇒ page 124 .

– Check the in‐

take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .
P0108 Manifold – Check the In‐ Signal voltage, > --- 2 Seconds • Continu‐
absolute take Air Tem‐ 4.8 V ous
pressure/ perature (IAT)
Barometric Sensor - • 2 DCY
pressure G42- . Refer
circuit high to Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
input ⇒ page 124 . permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Check the in‐
take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .

32 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0112 Intake Air – Check the In‐ IAT, > 141.0° C --- 2 Seconds • Continu‐
Tempera‐ take Air Tem‐ ous
ture Sensor perature (IAT)
1 Circuit Sensor - • 2 DCY
Low Input G42- . Refer
to
⇒ page 124 .

– Check the in‐

take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .
P0113 Intake Air – Check the In‐ IAT, < 45.75° C --- 2 Seconds • Continu‐
Tempera‐ take Air Tem‐ ous
ture Sensor perature (IAT)
1 Circuit Sensor - • 2 DCY
High Input G42- . Refer
to
⇒ page 124 .

– Check the in‐

take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .

5. Engine DTC Tables 33

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0116 Engine – Check the En‐ • Delta ECT, < ECT at start- 75 - 141 155 Sec‐ • Continu‐
Coolant gine Coolant 77 °C °C onds ous
Tempera‐ Temperature Driving condition 1 400 sec. af‐
ture Sensor (ECT) Sensor • >22 sec. ter DCY • 2 DCY
1 Circuit - G62- . Refer 30 Seconds
Range/Per‐ to • Vehicle speed,
formance ⇒ page 127 . >12.5 mph
• Engine speed,
– Check the >2500 rpm
coolant regu‐
lator Refer to • Mass air flow,
Engine Me‐ >60 kg/h
chanical Re‐
pair Manual. and
Driving condition 2
• >22 sec.
• Fuel cut off, Ac‐
tive
• Or Vehicle
speed, >65 mph
• Engine speed,
Idle
• And if no pass
cond. 1 & 2400
sec.
• Ignition, off >400
sec.
• ECT at start,
80-110 °C
• Delta modeled
ECT, 13 K
• ECT T start,
40-75°C

P0117 Engine – Check the En‐ ECT, >141°C — 2 Seconds • Continu‐

Coolant gine Coolant ous
Tempera‐ Temperature
ture Sensor (ECT) Sensor • 2 DCY
1 Circuit - G62- . Refer
Low Input to
⇒ page 127 .

– Check the
coolant regu‐
lator Refer to
Engine Me‐
chanical Re‐
pair Manual.

34 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0118 Engine – Check the En‐ ECT, <43.5°C — 2 Seconds • Continu‐
Coolant gine Coolant ous
Tempera‐ Temperature
ture Sensor (ECT) Sensor • 2 DCY
1 Circuit - G62- . Refer
High Input to
⇒ page 127 .

– Check the
coolant regu‐
lator Refer to
Engine Me‐
chanical Re‐
pair Manual.
P0121 Throttle/ – Check the • TPS 1-TPS • Engine start, 0.2 Sec‐ • Multiple
Pedal Posi‐ Throttle Posi‐ 2, >5.79% Completed onds
tion Sensor tion (TP) Sen‐ • 2 DCY
A Circuit sor - G79- / • Relative • TPS, No fault
Range/Per‐ Accelerator mass air inte‐
formance Pedal Position gral, >100 at
Sensor 2 - 0.45 sec.
G185- . Refer
to
⇒ page 107 .
P0122 Throttle/ – Check the Signal voltage, — 0.2 Sec‐ • Continu‐
Pedal Posi‐ Throttle Posi‐ <0.117 V onds ous
tion Sensor tion (TP) Sen‐
A Circuit sor - G79- / • 2 DCY
Low Input Accelerator
Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P0123 Throttle/
Protected by – Check
copyright. theprivate orSignal
Copying for commercial voltage,
purposes, > —is not
in part or in whole, 0.2 Sec‐ • Continu‐
Pedal Posi‐
permitted Throttle
unless authorised Posi‐
by AUDI AG. AUDI4.88 V not guarantee or accept any liability
AG does onds ous
tion with
Sensor tion (TP) Sen‐
respect to the correctness of information in this document. Copyright by AUDI AG.

A Circuit sor - G79- / • 2 DCY

High Input Accelerator
Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P0131 O2 Circuit – Check the • Short to — 3 Seconds • Continu‐
Low Volt‐ Heated Oxy‐ ground, ous
age (Bank gen Sensor <0.13 V
1, Sensor 1) (HO2S) - • 2 DCY
G39- . Refer
to
⇒ page 159 .
P0132 O2 Circuit – Check the • Short to bat‐ — 3 Seconds • Continu‐
High Volt‐ Heated Oxy‐ tery + >5.5 V ous
age (Bank gen Sensor
1, Sensor 1) (HO2S) - • 2 DCY
G39- . Refer
to
⇒ page 159 .

5. Engine DTC Tables 35

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0133 O2 Circuit – Check the • Lambda val‐ • Modeled temp, 65 Seconds • Once/
Slow Re‐ Heated Oxy‐ ue vs. mod‐ 500 - 950 °C DCY
sponse gen Sensor eled lambda
(Bank 1, (HO2S) - value >0.8 • ECT, >60°C • 2 DCY
Sensor 1) G39- . Refer • Engine speed,
to 700 - 3000 rpm
⇒ page 159 .
• Engine speed de‐
viation, 518 rpm
• Mass air flow,
0.426 - 1.2 g/rev
• Delta mass air
flow, <0.264 g/rev
• EVAP canister
load, <40%

P0135 O2 Heater – Check the • O2S not

Protected by• copyright.
O2SCopying
front dew-
for private or40 Seconds
commercial • inOnce/
purposes, part or in whole, is not
Circuit Oxygen Sen‐ ready after
permitted unlesspoint, Exceeded
authorised by AUDI AG. AUDI 120AGSec‐ DCY
does not guarantee or accept any liability
(Bank 1, sor (O2S) dew-point onds
with respect to the correctness of information in this document. Copyright by AUDI AG.

Sensor 1) Heater - Z19- . exceeded • Heater control, • 2 DCY

Refer to >40 sec. Active
• Continu‐
⇒ page 112 . • O2S front, No ous
• UEGO ce‐
ramic tem‐ other faults
• 2 DCY
perature • O2S front dew-
<680 or > point, Exceeded
860°C
• Heater control,
Active
• Lambda control,
Active
• O2S front, No
other faults

P0136 O2 Circuit – Check the • O2S signal • O2S rear, Ready 5 Seconds • Continu‐
(Bank 1, Oxygen Sen‐ rear 0.708 V ous
Sensor 2) sor (O2S) Be‐ Not oscillat‐ • Trim control post
hind Three ing at refer‐ cat, Closed loop • 2 DCY
Way Catalytic ence • Integrated mass
Converter air flow, 20 - 150
(TWC) - • Signal volt‐
age >0.2 V g Fuel cut off- Ac‐
G130- . Refer tive
to
⇒ page 162 .
P0137 O2 Circuit – Check the • Signal volt‐ • O2S rear dew‐ 5 Seconds • Continu‐
Low Volt‐ Oxygen Sen‐ age-<20 mV point, exceeded ous
age (Bank sor (O2S) Be‐
1, Sensor 2) hind Three • andInternal • O2S rear, fully • 2 DCY
Way Catalytic resistance- heated up
Converter <10 Ohms
• Mass air flow,
(TWC) - >12 kg/h
G130- . Refer
to
⇒ page 162 .

36 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0138 O2 Circuit – Check the Signal voltage — 5 Seconds • Continu‐
High Volt‐ Oxygen Sen‐ 1.5 V ous
age (Bank sor (O2S) Be‐
1, Sensor 2) hind Three • 2 DCY
Way Catalytic
Converter
(TWC) -
G130- . Refer
to
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

⇒ page 162 . in this document. Copyright by AUDI AG.

permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information
P0140 O2 Circuit – Check the Signal voltage, • Modeled exhaust 5 Seconds • Continu‐
No Activity Oxygen Sen‐ 0.37–0.47mV gas temp. >555° ous
Detected sor (O2S) Be‐ C
(Bank 1, hind Three • 2 DCY
Sensor 2) Way Catalytic
Converter
(TWC) -
G130- . Refer
to
⇒ page 162 .
P0141 O2 Heater – Check the Heater resist‐ • Modeled exhaust 60 Seconds • Continu‐
Circuit Oxygen Sen‐ ance, >10K gas temp, ous
(Bank 1, sor (O2S) Ohm 300-400 °C
Sensor 2) Heater - Z29- . • 2 DCY
Refer to • Heater duty cy‐
⇒ page 115 . cle, 0.8 - 99.2%

P0151 Bank 2 sen‐ – Check the Short to ground- — 3 Seconds • Continu‐

sor 1 Volt‐ Heated Oxy‐ <0.13 V ous
age too low gen Sensor
(HO2S) 2 - • 2 DCY
G108- . Refer
to
⇒ page 159 .
P0152 O2 Sensor – Check the Short to battery — 3 Seconds • Continu‐
Circuit, Heated Oxy‐ +>5.5 V ous
Bank 2 - gen Sensor
Sensor 1 (HO2S) 2 - • 2 DCY
High Volt‐ G108- . Refer
age to
⇒ page 159 .
P0153 O2 Sensor – Check the Lambda value • Modeled temp, 65 Seconds • Continu‐
Circuit, Heated Oxy‐ vs. modeled 500 - 950°C ous
Bank 2 - gen Sensor lambda value,
Sensor 1 (HO2S) 2 - >0.8 • ECT, >60°C • 2 DCY
Slow Re‐ G108- . Refer • Engine speed,
sponse to 700 - 3000 rpm
⇒ page 159 .
• Engine speed de‐
viation, 518 rpm
• Mass air flow,
0.426 - 1.2 g/rev
• Delta mass air
flow, <0.264 g/rev
• EVAP canister
load, <40%

5. Engine DTC Tables 37

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0155 O2 Sensor – Check the • O2S not • O2S front dew- 40 Seconds • Once/
Heater Cir‐ Oxygen Sen‐ ready after point, Exceeded 120 Sec‐ DCY
cuit, Bank 2 sor (O2S) 2 dew-point onds
Sensor 1 Heater - Z28- . exceeded- • Heater control, • 2 DCY
Electrical Refer to >40 sec. Active
• Continu‐
Fault ⇒ page 112 . • O2S front, No ous
• UEGO ce‐
ramic tem‐ other faults
• 2 DCY
perature- • O2S front dew-
<680 or > point, Exceeded
860°C
• Heater control,
Active
• Lambda control,
Active
• O2S front, No
other faults

P0156 O2 Sensor – Check the • O2S signal • O2S rear, Ready 5 Seconds • Continu‐
Circuit, Oxygen Sen‐ rear 0.708 V ous
Bank 2 - sor (O2S) 2 • Trim control post
Sensor 2 Behind Three • Not oscillat‐ cat, Closed loop • 2 DCY
Malfunction Way Catalytic ing at refer‐
ence • Integrated mass
Converter air flow, 20-150 g
(TWC) - • Signal volt‐
G131- . Refer age >0.2 V • Fuel cut off, Ac‐
to tive
⇒ page 162 .
P0157 O2 Sensor – Check the • Signal volt‐ • O2S rear dew 5 Seconds • Continu‐
Circuit, Oxygen Sen‐ age-<20 mV point, Exceeded ous
Bank 2 - sor (O2S) 2
Sensor 2 Behind Three • And Internal • O2S rear, Fully • 2 DCY
Low Volt‐ Way Catalytic resistance heated up
age Converter <10 Ohms
• Mass air flow,
(TWC) - >12 kg/h
G131- . Refer
to
⇒ page 162 .
P0158 O2 Sensor – Check the Signal voltage — 5 Seconds • Continu‐
Circuit, Oxygen Sen‐ >1.5 V ous
Bank 2 - sor (O2S) 2
Sensor 2 Behind Three • 2 DCY
High Volt‐ Way Catalytic
age Converter
(TWC) -
G131- . Refer
to
⇒ page 162 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
P0160 O2 Sensor – Check
permitted unlessthe Signal
authorised by AUDI AG. voltage
AUDI AG does Modeled exhaust
not guarantee 5 Seconds
or accept any liability • Continu‐
Circuit No Oxygen Sen‐ 0.376 - 0.474 V temperature >555°C
with respect to the correctness of information in this document. Copyright by AUDI AG.
ous
Activity De‐ sor (O2S) 2
tected Behind Three • 2 DCY
(Bank 2 Way Catalytic
Sensor 2) Converter
(TWC) -
G131- . Refer
to
⇒ page 162 .

38 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0161 HO2S – Check the Internal resist‐ • Modeled exhaust 60 Seconds • Once/
Heater Oxygen Sen‐ ance >10K gas temp, 300 - DCY
Control Cir‐ sor (O2S) 2 Ohms 400°C
cuit (Bank 2 (behind Three • 2 DCY
Sensor 2) Way Catalytic • Heater duty cy‐
Converter cle, 0.8 - 99.2%
(TWC)) Heat‐
er - Z30- . Re‐
fer to
⇒ page 115 .

5. Engine DTC Tables 39

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0171 System Too – Check the fuel • Addative • Lambda control, 35 Seconds • Continu‐
Lean (Bank pump delivery system too Closed loop ous
1) and quantity . rich Adaptive
Refer to value->25% • EVAP purge • 2 DCY
⇒ page 94 . valve, Closed
• Multiplicative
– Check the system too • ECT or Sub.
rich Adaptive ECT, >70°C
Fuel pressure
regulator and value->22% • Mass fuel flow,
residual pres‐ <0.04 g/rev
sure . Refer to
⇒ page 131 . • Engine speed, <
864 RPM
– Check Fuel
Pressure Sen‐ • Delta mass air
sor - G247- flow, <7.5 kg/h
⇒ page 133 . • Accelerator PP
value, <250%/
– Check the fuel sec.
injectors . Re‐
fer to • Integrated mass
⇒ page 153 . air flow, >25 g

– Check the • Lambda control,

Heated Oxy‐ Closed loop
gen Sensor • EVAP purge
(HO2S) - valve, Closed
G39- . Refer
to • ECT or Sub.
⇒ page 159 . ECT, >70°C
– Check the • Engine speed,
Oxygen Sen‐ 992–4500 RPM
sor (O2S) Be‐ • Mass air flow, 34–
hind Three 450 kg/h
Way Catalytic
Converter • Delta mass air
(TWC) - flow, <7.5 kg/h
G130- . Refer
to • Accelerator PP
⇒ page 162 . value, <250%/
sec.
– Check the • Integrated mass
Evaporative air flow, >25 g
Emission
(EVAP) Can‐
ister Purge
Regulator
Valve - N80- .
Refer to
⇒ page 101 .

– Check the in‐

take
Protected by copyright. Copying system
for private or commercial purposes, in part or in whole, is not
permitted unless authorised for leaks
by AUDI AG. AUDI AG does not guarantee or accept any liability
(false
with respect to the correctness air). Re‐in this document. Copyright by AUDI AG.
of information
fer to
⇒ page 157 .

– Check ex‐
haust system
for proper
seal.

40 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
– Check vac‐
uum lines for
leaks
P0172 System Too – Check the • Addative • Lambda control, 35 Seconds • Continu‐
Rich (Bank Fuel pressure system too Closed loop ous
1) regulator and rich Adaptive
residual pres‐ value <-25% • EVAP purge • 2 DCY
sure . Refer to valve, Closed
⇒ page 131 . • Multiplicative
system too • ECT or Sub.
rich Adaptive ECT, >70°C
– Check the fuel
injectors . Re‐ value <-25% • Mass fuel flow,
fer to <0.04 g/rev
⇒ page 153 .
• Engine speed, <
– Check the 864 RPM
Evaporative
Emission • Delta mass air
(EVAP) Can‐ flow, <7.5 kg/h
ister Purge • Accelerator PP
Regulator value, <250%/
Valve - N80- . sec.
Refer to
⇒ page 101 . • Integrated mass
air flow, >25 g
– Check the
Heated Oxy‐ • Lambda control,
gen Sensor Closed loop
(HO2S) - • EVAP purge
G39- . Refer valve, Closed
to
⇒ page 159 . • ECT or Sub.
ECT, >70°C
– Check the
Oxygen Sen‐ • Engine speed,
sor (O2S) Be‐ 992–4500 RPM
hind Three • Mass air flow, 34–
Way Catalytic 450 kg/h
Converter
(TWC) - • Delta mass air
G130- . Refer flow, <7.5 kg/h
to
⇒ page 162 . • Accelerator PP
value, <250%/
sec.
• Integrated mass
air flow, >25 g

5. Engine DTC Tables 41

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0174 System too – Check the fuel • Addative • Lambda control, 35 Seconds • Continu‐
Lean, Bank pump delivery system too Closed loop ous
2 and quantity . rich Adaptive
Refer to value >22% • EVAP purge • 2 DCY
⇒ page 94 . valve, Closed
• Multiplicative
– Check the system too • ECT or Sub.
rich Adaptive ECT, >70°C
Fuel pressure
regulator and value >22% • Mass fuel flow,
residual pres‐ <0.04 g/rev
sure . Refer to
⇒ page 131 . • Engine speed, <
864 RPM
– Check Fuel
Pressure Sen‐ • Delta mass air
sor - G247- flow, <7.5 kg/h
⇒ page 133 . • Accelerator PP
value, <250%/
– Check the fuel sec.
injectors . Re‐
fer to • Integrated mass
⇒ page 153 . air flow, >25 g

– Check the • Lambda control,

Heated Oxy‐ Closed loop
gen Sensor • EVAP purge
(HO2S) 2 - valve, Closed
G108- . Refer
to • ECT or Sub.
⇒ page 159 . ECT, >70°C
– Check the • Engine speed,
Oxygen Sen‐ 992–4500 RPM
sor (O2S) 2 • Mass air flow, 34–
Behind Three 450 kg/h
Way Catalytic
Converter • Delta mass air
(TWC) - flow, <7.5 kg/h
G131- . Refer
Protected by copyright. Copying
permitted unless authorisedto
for private
• anyAccelerator
or commercial purposes, in part or in whole, is not
by AUDI AG. AUDI AG does not guarantee or accept liability PP
⇒ page
with respect to the correctness 162 . in this document. Copyright by AUDI
of information value,
AG. <250%/
sec.
– Check the • Integrated mass
Evaporative air flow, >25 g
Emission
(EVAP) Can‐
ister Purge
Regulator
Valve - N80- .
Refer to
⇒ page 101 .

– Check the in‐

take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .

– Check ex‐
haust system
for proper
seal.

42 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

5. Engine DTC Tables 43

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0175 System too – Check the fuel • Addative • Lambda control, 35 Seconds • Continu‐
Rich, Bank pump delivery system too Closed loop ous
2 and quantity . rich Adaptive
Refer to value <-25% • EVAP purge • 2 DCY
⇒ page 94 . valve, Closed
• Multiplicative
– Check the system too • ECT or Sub.
rich Adaptive ECT, >70°C
Fuel pressure
regulator and value <-25% • Mass fuel flow,
residual pres‐ <0.04 g/rev
sure . Refer to
⇒ page 131 . • Engine speed, <
864 RPM
– Check Fuel
Pressure Sen‐ • Delta mass air
sor - G247- flow, <7.5 kg/h
⇒ page 133 . • Accelerator PP
value, <250%/
– Check the fuel sec.
injectors . Re‐
fer to • Integrated mass
⇒ page 153 . air flow, >25 g

– Check the • Lambda control,

Heated Oxy‐ Closed loop
gen Sensor • EVAP purge
(HO2S) 2 - valve, Closed
G108- . Refer
to • ECT or Sub.
⇒ page 159 . ECT, >70°C
– Check the • Engine speed,
Oxygen Sen‐ 992–4500 RPM
sor (O2S) 2 • Mass air flow, 34–
Behind Three 450 kg/h
Way Catalytic
Converter • Delta mass air
(TWC) - flow, <7.5 kg/h
G131- . Refer
to • Accelerator PP
⇒ page 162 . value, <250%/
Protected by copyright. Copying for private or commercial purposes, in part or sec.
in whole, is not
– Check the
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
• byIntegrated
with respect to the correctness of information in this document. Copyright AUDI AG. mass
Evaporative air flow, >25 g
Emission
(EVAP) Can‐
ister Purge
Regulator
Valve - N80- .
Refer to
⇒ page 101 .

– Check the in‐

take system
for leaks
(false air). Re‐
fer to
⇒ page 157 .

– Check ex‐
haust system
for proper
seal.

44 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
– Check vac‐
uum lines for
leaks
P0190 Fuel Rail – Check the Signal voltage > — 2 Seconds • Continu‐
Pressure Fuel Pressure 4.8 V ous
Sensor A Sensor -
Circuit G247- . Refer • 2 DCY
to
⇒ page 133 .
P0192 Fuel Rail – Check the Signal voltage < — 2 Seconds • Continu‐
Pressure Fuel Pressure 0.2 V ous
Sensor A Sensor -
Circuit Low G247- . Refer • 2 DCY
Input to
⇒ page 133 .
P0201 Injector Cir‐ – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
cuit / Open - injectors . Re‐ rent, <10 A Commanded on ous
Cylinder 1 fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0202 Injector Cir‐ – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
cuit / Open - injectors . Re‐ rent, <10 A Commanded on ous
Cylinder 2 fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0203 Injector Cir‐ – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
cuit / Open - injectors . Re‐ rent, <10 A Commanded on ous
Cylinder 3 fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

voltage, >3.5 Commanded

to the correctnessoff
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect of information in this document. Copyright by AUDI AG.
V

P0204 Injector Cir‐ – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
cuit / Open - injectors . Re‐ rent, <10 A Commanded on ous
Cylinder 4 fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0205 Injector Cir‐ – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
cuit / Open - injectors . Re‐ rent, <10 A Commanded on ous
Cylinder 5 fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0206 Injector Cir‐ – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
cuit / Open - injectors . Re‐ rent, <10 A Commanded on ous
Cylinder 6 fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

5. Engine DTC Tables 45

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0219 Engine Inspect and re‐ Engine speed, • Range position, 0.5 Sec‐ • Continu‐
Overspeed pair mechanical >6750 RPM Not P,R,N onds ous
Condition damage as nec‐
essary. • Position sensor, • 2 DCY
Status OK
• Engine speed,
Status OK
• Time since range
position not
P,R,N, 2 Sec.

P0221 Throttle/ – Check the • TPS 1-TPS • Engine start, 0.2 Sec‐ • Continu‐
Pedal Posi‐ Throttle Posi‐ 2, >5.79° Completed onds ous
tion Sensor/ tion (TP) Sen‐
Switch B sor - G79- / • And Relative • TPS, No fault • 2 DCY
Circuit Accelerator mass air inte‐
Range/Per‐ Pedal Position gral >100 at
formance Sensor 2 - 0.45 sec.
G185- . Refer
to
⇒ page 107 .
P0222 Throttle/ – Check the Signal voltage, < — 0.2 Sec‐ • Continu‐
Pedal Posi‐ Throttle Posi‐ 0.117 V onds ous
tion Sensor/ tion (TP) Sen‐
Switch B sor - G79- / • 2 DCY
Circuit Low Accelerator
Input Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
P0223 Throttle/
permitted unless authorised–by AUDI
Check the AG doesSignal
AG. AUDI voltage,
not guarantee > any liability —
or accept 0.2 Sec‐ • Continu‐
Pedalto Posi‐
with respect the correctnessThrottle Posi‐
of information 4.88 V Copyright by AUDI AG.
in this document. onds ous
tion Sensor/ tion (TP) Sen‐
Switch B sor - G79- / • 2 DCY
Circuit High Accelerator
Input Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P0261 Cylinder 1 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, <10 A Commanded on ous
cuit Low fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0262 Cylinder 1 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, >16 A Commanded on ous
cuit High fer to
⇒ page 153 . • 2 DCY

P0264 Cylinder 2 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, <10 A Commanded on ous
cuit Low fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

46 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0265 Cylinder 2 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, >16 A Commanded on ous
cuit High fer to
⇒ page 153 . • 2 DCY

P0267 Cylinder 3 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, <10 A Commanded on ous
cuit Low fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0268 Cylinder 3 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, >16 A Commanded on ous
cuit High fer to
⇒ page 153 . • 2 DCY

P0270 Cylinder 4 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, <10 A Commanded on ous
cuit Low fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0271 Cylinder 4 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, >16 A Commanded on ous
cuit High fer to
⇒ page 153 . • 2 DCY

P0273 Cylinder 5 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, <10 A Commanded on ous
cuit Low fer to
⇒ page 153 . • And Signal • Injection valve, • 2 DCY
voltage, >3.5 Commanded off
V

P0274 Cylinder 5 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, >16 A Commanded on ous
cuit High fer to
⇒ page 153 . • 2 DCY

P0276 Cylinder 6 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, <10 A Commanded on ous
cuit Low fer to
• And Signal • Injection valve,
Protected
⇒ page 153 . permitted
by copyright. Copying for private or commercial purposes, in part or in • 2 isDCY
whole, not

voltage,
with >3.5 Commanded offdocument. Copyright by AUDI AG.
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
respect to the correctness of information in this
V

P0277 Cylinder 6 – Check the fuel • Signal cur‐ • Injection valve, 3 Seconds • Continu‐
Injector Cir‐ injectors . Re‐ rent, >16 A Commanded on ous
cuit High fer to
⇒ page 153 . • 2 DCY

5. Engine DTC Tables 47

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0300 Random – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
take system • Camshaft revolu‐ Rev.
• Emission tions, 1 • Immed.
for leaks
(false air). Re‐ threshold
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ pageProtected
131 . by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Check the fuel
injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .
P0301 Cylinder 1 – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
take system • Camshaft revolu‐ Rev.
• Emission tions, 1 • Immed.
for leaks
(false air). Re‐ threshold
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ page 131 .

– Check the fuel

injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .

48 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0302 Cylinder 2 – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
take system • Camshaft revolu‐ Rev.
• Emission tions, 1 • Immed.
for leaks
(false air). Re‐ threshold
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ page 131 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Checkwith
therespect
fuel to the correctness of information in this document. Copyright by AUDI AG.
injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .
P0303 Cylinder 3 – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
take system • Camshaft revolu‐ Rev.
• Emission tions, 1 • Immed.
for leaks
(false air). Re‐ threshold
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ page 131 .

– Check the fuel

injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .

5. Engine DTC Tables 49

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0304 Cylinder 4 – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
take system • Camshaft revolu‐ Rev.
• Emission tions, 1 • Immed.
for leaks
(false air). Re‐ threshold
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ page 131 .

– Check the fuel

injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .
P0305 Cylinder 5 – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
Copying for private or commercial purposes, in• part
take system Camshaft
or in whole,revolu‐ Rev.
Protected by copyright.
• AUDI
Emission
is not
AG does not guarantee or accept any tions,
liability 1
• Immed.
for
permitted unless leaksby AUDI AG.
authorised
(false air). Re‐ threshold
with respect to the correctness of information in this document. Copyright by AUDI AG.
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ page 131 .

– Check the fuel

injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .

50 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0306 Cylinder 6 – Check the • Emission •Time after engine • 1000 • Continu‐
Misfire De‐ Spark plugs. threshold 1st start, idle-150 Rev. ous
tected interval % RPM
– Check the in‐ ( MR), >1.3% • 200 • 2 DCY
take system • Camshaft revolu‐ Rev.
• Emission tions, 1 • Immed.
for leaks
(false air). Re‐ threshold
misfire rate • Engine speed
fer to range, idle, 6850
⇒ page 157 . (MR), > 1.3%
RPM
• Catalyst
– Check the damage mis‐ • Engine torque, >
Fuel pressure fire rate 0 torque (Nm)
regulator and (MR), > 1.3–
residual pres‐ • Fuel cut off, not
15% active
sure . Refer to
⇒ page 131 .

– Check the fuel

injectors . Re‐
fer to
⇒ page 153 .

– Check the Ig‐

nition Coil with
Power Output
Stage . Refer
to
⇒ page 189 .
P0326 Knock Sen‐ – Check the Lower thresh‐ • Engine speed, > 40 Times • Continu‐
sor 1 Circuit Knock Sensor old, <0.03 V 2656 RPM ous
Range/Per‐ (KS) 1 - G61- .
formance Refer to • Mass air flow, • 2 DCY
⇒ page 186 . >0.75 g/rev

P0327 Knock Sen‐ – Check the Lower thresh‐ • Engine speed, > 40 Times • Continu‐
sor 1 Circuit Knock Sensor old, 0.18 V 2656 RPM ous
Low Input (KS) 1 - G61- .
(Bank 1) Refer to • Mass air flow, • 2 DCY
⇒ page 186 . >0.75 g/rev

P0328 Knock Sen‐ – Check the Upper thresh‐ • Engine speed, > 40 Times • Continu‐
sor 1 Circuit Knock Sensor old, 4.8 V 2656 RPM ous
High Input (KS) 1 - G61- .
(Bank 1) Refer to • Mass air flow, • 2 DCY
⇒ page 186 . >0.75 g/rev

P0331 Knock Sen‐ – Check the Upper thresh‐ • Engine speed, > 40 Times • Continu‐
sor 2 Circuit Knock Sensor old, >1.99 V 2656 RPM ous
Range/Per‐ Protected
(KS) 2 - G66-
by copyright. . for private or commercial purposes, in part or in whole, is not
Copying
formance permitted
Refer to
unless authorised by AUDI AG. AUDI AG does • notMass airor flow,
guarantee accept any liability • 2 DCY
⇒ page 186 . >0.75
with respect to the correctness of information in this document. g/revby AUDI AG.
Copyright

P0332 Knock Sen‐ – Check the Lower thresh‐ • Engine speed, > 40 Times • Continu‐
sor 2 Circuit Knock Sensor old, 0.18 V 2656 RPM ous
Low Input (KS) 2 - G66- .
(Bank 2) Refer to • Mass air flow, • 2 DCY
⇒ page 186 . >0.75 g/rev

P0333 Knock Sen‐ – Check the Upper thresh‐ • Engine speed, > 40 Times • Continu‐
sor 2 Circuit Knock Sensor old, 4.8 V 2656 RPM ous
High Input (KS) 2 - G66- .
(Bank 2) Refer to • Mass air flow, • 2 DCY
⇒ page 186 . >0.75 g/rev

5. Engine DTC Tables 51

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0335 Crankshaft – Check the En‐ • Delta signal Engine speed, > 32 0.4 Sec‐ • Continu‐
Position gine Speed voltage > 1 V RPM onds ous
Sensor (A) (RPM) Sensor
Circuit-G28 - G28- . Refer • Internal sig‐ • 2 DCY
Malfunction to nal voltage
⇒ page 122 . <1.5 V
• Internal volt‐
age >3.5
VRPM sig‐
nal- no signal

P0336 Crankshaft – Check the En‐ • RPM signal • Engine speed, 0.4 Sec‐ • Continu‐
Position gine Speed comparison >32 rpm onds ous
Sensor (A) (RPM) Sensor with phase 0.3 Sec‐
Circuit - G28- . Refer sensor-not • Engine speed, onds • 2 DCY
Range/ Per‐ to synchronous >416 rpm 25 Seconds
formance ⇒ page 122 .
• Counted ver‐ • Engine speed,
sus refer‐ >480 rpm
ence teeth-
>1
• Actual time
value vs.
modeled
time value-
>1.375

P0340 Camshaft – Check the Signal voltage, • Engine speed, 0.4 Sec‐ • Continu‐
Position Camshaft Po‐ no altering at 4 >416 rpm onds ous
Sensor A sition (CMP) revs
Circuit Sensor - • 2 DCY
(Bank 1 or G40- . Refer
single sen‐ to
sor) ⇒ page 180 .
P0341 Camshaft – Check the • Actual time • Engine speed, 0.1 Sec‐ • Continu‐
Position Camshaft Po‐ value-<1 vs. >416 rpm onds ous
Sensor A sition (CMP) min time val‐ 2 Seconds
Circuit Sensor - ue • Duty cycle, Com‐ 3 Seconds • 2 DCY
Range/Per‐ G40- . Refer manded off
formance to • Adaptive val‐
(Bank 1 or ⇒ page 180 . ue vs. target
single sen‐ value >21°
sor) CA
• Actual time
value vs.
modeled
time value
1-3.5

P0345 Camshaft – Check the Signal voltage, • Engine speed, 0.4 Sec‐ • Continu‐
Position Camshaft Po‐ no altering at 4 >416 rpm onds ous
Sensor (A) sition (CMP) revs
Circuit
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Sensor
permitted- unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
• 2 DCY
G40-with. Refer
respect to the correctness of information in this document. Copyright by AUDI AG.
to
⇒ page 180 .

52 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0346 Camshaft – Check the • Actual time • Engine speed, 0.1 Sec‐ • Continu‐
Position Camshaft Po‐ value-<1 vs. >416 rpm onds ous
Sensor “A” sition (CMP) min time val‐ 2 Seconds
Circuit Sensor - ue • Duty cycle, Com‐ 3 Seconds • 2 DCY
Range/Per‐ G40- . Refer manded off
formance to • Adaptive val‐
⇒ page 180 . ue vs. target
value >21°
CA
• Actual time
value vs.
modeled
time value
1-3.5

P0351 Ignition Coil – Check the Ig‐ • Open circuit Engine speed, 512 2 Seconds • Continu‐
A Primary/ nition Coil with <0.05 - 0.2 RPM ous
Secondary Power Output mA
Circuit Stage . Refer • 2 DCY
to • Short to
⇒ page 189 . ground/B+
>0.04-0.2
mA

P0352 Ignition Coil – Check the Ig‐ • Signal cur‐ Engine speed, < 2 Seconds • Continu‐
B Primary/ nition Coil with rent, < 5000 RPM ous
Secondary Power Output 4.95-8.82
Circuit Stage . Refer mA • 2 DCY
to
⇒ page 189 . • Internal fault,
changing er‐
ror

P0353 Ignition Coil – Check the Ig‐ • Signal cur‐ Engine speed, < 2 Seconds • Continu‐
C Primary/ nition Coil with rent, < 5000 RPM ous
Secondary Power Output 4.95-8.82
Circuit Stage . Refer mA • 2 DCY
to
⇒ page 189 . • Internal fault,
changing er‐
ror

P0354 Ignition Coil – Check the Ig‐ • Signal Protected

cur‐ byEngine
copyright.speed,
Copying for<private or2commercial
Seconds • inContinu‐
purposes, part or in whole, is not
D Primary/ nition Coil with rent, < permitted unless
5000authorised
RPM by AUDI AG. AUDI AG does not guarantee ousor accept any liability
Secondary Power Output 4.95-8.82with respect to the correctness of information in this document. Copyright by AUDI AG.
Circuit Stage . Refer mA • 2 DCY
to
⇒ page 189 . • Internal fault,
changing er‐
ror

P0355 Ignition Coil – Check the Ig‐ • Signal cur‐ Engine speed, < 2 Seconds • Continu‐
E Primary/ nition Coil with rent, < 5000 RPM ous
Secondary Power Output 4.95-8.82
Circuit Stage . Refer mA • 2 DCY
to
⇒ page 189 . • Internal fault,
changing er‐
ror

5. Engine DTC Tables 53

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0356 Ignition Coil – Check the Ig‐ • Signal cur‐ Engine speed, < 2 Seconds • Continu‐
F Primary/ nition Coil with rent, < 5000 RPM ous
Secondary Power Output 4.95-8.82
Circuit Stage . Refer mA • 2 DCY
to
⇒ page 189 . • Internal fault,
changing er‐
ror

P0365 Camshaft – Check the Signal voltage, • Engine speed, 0.4 Sec‐ • Continu‐
Position Camshaft Po‐ no altering at 4 >416 rpm onds ous
Sensor (B) sition (CMP) revs
Circuit Sensor 2 - • 2 DCY
(Bank 1) G163- . Refer
Malfunction to
⇒ page 180 .
P0366 Camshaft – Check the • Actual time • Engine speed, 0.1 Sec‐ • Continu‐
Position Camshaft Po‐ value-<1 vs. >416 rpm onds ous
Sensor (B) sition (CMP) min time val‐ 2 Seconds
Circuit Sensor 2 - ue • Duty cycle, Com‐ 3 Seconds • 2 DCY
(Bank 1) G163- . Refer manded off
Range/ Per‐ to • Adaptive val‐
formance ⇒ page 180 . ue vs. target
value >21°
CA
• Actual time
value vs.
modeled
time value
1-3.5

P0390 Camshaft – Check the Signal voltage, • Engine speed, 0.4 Sec‐ • Continu‐
Position Camshaft Po‐ no altering at 4 >416 rpm onds ous
Sensor (B) sition (CMP) revs
Circuit Sensor 4 - • 2 DCY
(Bank 2) G301- . Refer
Malfunction to
⇒ page 180 .
P0391 Camshaft – Check the • Actual time • Engine speed, 0.1 Sec‐ • Continu‐
Position Camshaft Po‐ value-<1 vs. >416 rpm onds ous
Sensor (B) Protected
sition by (CMP)
copyright. Copying min time val‐ purposes, in part or in whole,2 Seconds
Circuit Sensor 4authorised
-
for private
• not
or commercial
ue AG. AUDI AG does Duty cycle, Com‐ 3is Seconds not
• 2 DCY
manded off by AUDI AG.
permitted unless by AUDI guarantee or accept any liability
(Bank 2) G301-
with respect. to
Refer
the correctness of information in this document. Copyright
Range/ Per‐ to • Adaptive val‐
formance ⇒ page 180 . ue vs. target
value >21°
CA
• Actual time
value vs.
modeled
time value
1-3.5

54 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0421 Catalyst – Check the Amplitude ratio • Modeled exhaust 70 Sec. • Once/
System Effi‐ Heated Oxy‐ O2S >0.8 temp, 630 - 900 ° DCY
ciency Be‐ gen Sensor C
low Thresh‐ (HO2S) - • 2 DCY
old (Bank 1) G39- . Refer • ECT, >60 °C
to • Engine speed,
⇒ page 159 . 1100 - 3500 rpm
– Check the • Delta engine
Oxygen Sen‐ speed, 350 rpm
sor (O2S) Be‐
hind Three • Mass air flow,
Way Catalytic 0.36 - 1.4 g/rev
Converter • Delta mass air
(TWC) - flow , <2.25 g/rev/
G130- . Refer s
to
⇒ page 162 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI • AGEVAP
does not canister
guarantee or accept any liability
load,
with respect to the correctness of information in this low Copyright by AUDI AG.
document.
– Check the cat‐
alytic convert‐
er. Refer to
⇒ page 177 .
P0431 Catalyst – Check the Amplitude ratio • Modeled exhaust 70 Sec. • Once/
System Effi‐ Heated Oxy‐ O2S >0.8 temp, 630 - 900 ° DCY
ciency Be‐ gen Sensor C
low Thresh‐ (HO2S) 2 - • 2 DCY
old (Bank 2) G108- . Refer • ECT, >60 °C
to • Engine speed,
⇒ page 159 . 1100 - 3500 rpm
– Check the • Delta engine
Oxygen Sen‐ speed, 350 rpm
sor (O2S) 2
Behind Three • Mass air flow,
Way Catalytic 0.36 - 1.4 g/rev
Converter • Delta mass air
(TWC) -
G131- . Refer flow , <2.25 g/rev/
s
to
⇒ page 162 . • EVAP canister
load, low
– Check the cat‐
alytic convert‐
er. Refer to
⇒ page 177 .

5. Engine DTC Tables 55

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0441 Evaporative – Check the • Deviation • Engine speed, 25 Seconds • Once/
Emission Evaporative lambda con‐ Idle DCY
System In‐ Emission trol <7%
correct (EVAP) Can‐ • Engine speed de‐ • 2 DCY
Purge Flow ister Purge • Deviation viation, < 80 RPM
Regulator idle control
<9.7% • ECT, >69.75 °C
Valve - N80- .
Refer to • Sub. ECT,
⇒ page 101 . >69.75 °C
– Check the • IAT, >5 °C
Leak Detec‐ • IAT, at engine
tion Pump start->5 °C
(LDP) - Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
V144- . Refer • Altitude,
permitted unless authorised by AUDI AG. AUDI AG <2500
does not M
guarantee or accept any liability
to with respect to the correctness of information in this document. Copyright by AUDI AG.
⇒ page 104

– Check the
Evaporative
Emission
(EVAP) Can‐
ister System
for proper
seal. Refer to
⇒ page 100 .
P0442 Evaporative – Check the Time for pres‐ • EVAP purge 140 Sec‐ • Once/
Emission Evaporative sure drop valve, Closed onds DCY
System Emission 1.0-1.3 Sec.
Leak Detec‐ (EVAP) Can‐ • LDP, Activated • 2 DCY
ted (Small ister Purge • Altitude, <2500 M
Leak) Regulator
Valve - N80- . • Number of diag‐
Refer to nostic attempts, <
⇒ page 101 . 2
– Check the • IAT, >5.25 °C
Leak Detec‐
tion Pump • Delta ambient
pressure, 0.3 kPa
(LDP) -
V144- . Refer • IAT drop after en‐
to gine start, < 9.75
⇒ page 104 K
– Check the • Time after engine
Evaporative start, >210–1200
Emission Sec.
(EVAP) Can‐
ister System • ECT at start,
for proper 4.5-35 °C
seal. Refer to • Vehicle speed,
⇒ page 100 . >6 MPH

56 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0444 Evaporative – Check the Open circuit • EVAP purge 2 Seconds • Continu‐
Emission Evaporative >0.8 mA valve, Comman‐ ous
System Emission ded off
Purge Con‐ (EVAP) Can‐ • 2 DCY
trol Valve ister Purge • Engine start,
Circuit Regulator Completed
Open Valve - N80- .
Refer to
⇒ page 101 .

– Check the
Leak Detec‐
tion Pump
(LDP) -
V144-
Protected by copyright. Copying for . Refer
private or commercial purposes, in part or in whole, is not
to AG. AUDI AG does not guarantee or accept any liability
permitted unless authorised by AUDI
with respect to the correctness⇒of page 104
information in this document. Copyright by AUDI AG.

– Check the
Evaporative
Emission
(EVAP) Can‐
ister System
for proper
seal. Refer to
⇒ page 100 .
P0455 Evaporative – Check the Time for pres‐ • EVAP purge 140 Sec‐ • Once/
Emission Evaporative sure drop < valve, Closed onds DCY
System Emission 0.65-0.8 Sec.
Leak Detec‐ (EVAP) Can‐ • LDP, Activated • 2 DCY
ted (gross ister Purge • Altitude, <2500 M
leak/no Regulator
flow) Valve - N80- . • Number of diag‐
Refer to nostic attempts, <
⇒ page 101 . 2
– Check the • IAT, >5.25 °C
Leak Detec‐
tion Pump • Delta ambient
pressure, 0.3 kPa
(LDP) -
V144- . Refer • IAT drop after en‐
to gine start, < 9.75
⇒ page 104 K
– Check the • Time after engine
Evaporative start, >210–1200
Emission Sec.
(EVAP) Can‐
ister System • ECT at start,
for proper 4.5-35 °C
seal. Refer to • Vehicle speed,
⇒ page 100 . >6 MPH

5. Engine DTC Tables 57

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0456 Evaporative – Check the Time for pres‐ • EVAP purge 140 Sec‐ • Once/
Emission Evaporative sure drop <4.5 – valve, Closed onds DCY
System Emission 5.5 sec.
Leak Detec‐ (EVAP) Can‐ • LDP, Activated • 2 DCY
ted (very ister Purge • Altitude, <2500 M
small leak) Regulator
Valve - N80- . • Number of diag‐
Refer Copying
Protected by copyright. to for private or commercial purposes, innostic
part or inattempts,
whole, is not <
⇒ authorised
permitted unless page 101 . AG. AUDI AG does not guarantee
by AUDI 10or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Check the • IAT, >5.25 °C
Leak Detec‐ • Delta ambient
tion Pump pressure, 0.2 kPa
(LDP) -
V144- . Refer • IAT drop after en‐
to gine start, < 9.75
⇒ page 104 K
– Check the • Time after engine
Evaporative start, >210–1200
Emission Sec.
(EVAP) Can‐
ister System • ECT at start,
for proper 4.5-35 °C
seal. Refer to • Vehicle speed, 6–
⇒ page 100 . 80.7 MPH
• Vehicle accelera‐
tion, <2.1 m/s2

P0458 Evaporative – Check the Signal voltage, • EVAP purge 2 Seconds • Continu‐
Emission Evaporative <3.2 V valve, Comman‐ ous
System Emission ded off
Purge Con‐ (EVAP) Can‐ • 2 DCY
trol Valve ister Purge • Engine start,
Circuit Low Regulator Completed
Valve - N80- .
Refer to
⇒ page 101 .

– Check the
Leak Detec‐
tion Pump
(LDP) -
V144- . Refer
to
⇒ page 104

– Check the
Evaporative
Emission
(EVAP) Can‐
ister System
for proper
seal. Refer to
⇒ page 100 .

58 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0459 Evaporative – Check the Signal current, > • Evap purge 2 Seconds • Continu‐
Emission Evaporative 1.0 A valve, Comman‐ ous
System Emission ded on
Purge Con‐ (EVAP) Can‐ • 2 DCY
trol Valve ister Purge • Engine start,
Circuit High Regulator Completed
Valve - N80- .
Refer to
⇒ page 101 .

– Check the
Leak Detec‐
tion Pump
(LDP) -
V144- . Refer
to
⇒ page 104

– Check the
Evaporative
Emission
(EVAP) Can‐
ister System
for proper
seal. Refer to
⇒ page 100 .
P0501 Vehicle – Check the ve‐ VSS signal, • Time after start, 3 5 Seconds • Multiple
Speed Sen‐ hicle speed >184 MPH sec.
sor A signal. Refer • 2 DCY
Range/Per‐ to
formance ⇒ page 171 .
P0506 Idle Air – Check the Engine speed • Engine speed, 13 Seconds • Multiple
Control Throttle Valve deviation, < -80 Idle
System Control Mod‐ RPM • 2 DCY
RPM Lower ule - J338- . • Vehicle speed, 0
Than Ex‐ Refer to MPH
pected ⇒ page 118 . • Mass air flow,
<0.05 g/rev
• EVAP purge flow,
<1 kg/h
• ECT, 60 - 110 °C

P0507 Idle Air – Check the Engine speed • Engine speed, 13 Seconds • Multiple
Control Throttle Valve deviation >80 Idle
System Control Mod‐ RPM • 2 DCY
RPM High‐ ule - J338- . • Vehicle speed, 0
er Than Ex‐ Refer to MPH
pected ⇒ page 118 . • Mass air flow,
<0.05 g/rev
• EVAP purge flow,
<1 kg/h
• ECT, 60 - 110 °C

5. Engine DTC Tables 59

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0562 System – Check the • Battery volt‐ • Engine speed or 0.05 Sec‐ • Continu‐
Voltage Transmission age to low 7– input speed, > onds ous
Low Control Mod‐ 8.4 V 1400 RPM 2.5 Sec‐
ule (TCM) - onds • 2 DCY
J217- voltage • Battery volt‐ • And position, N or
supply. Refer age to low to P
to operate sole‐
noids, but • Or Engine speed,
⇒ page 203 . >500 RPM
able to main‐
tain the • And position, Not
present sole‐ (P or N)
noid state < 9
V • FET, Enabled

P0563 System – Check the Battery voltage • FET, Enabled 2.5 Sec‐ • Continu‐
Voltage Transmission to high >16 V onds ous
High Control Mod‐ • Engine speed,
ule (TCM) - >400 RPM • 2 DCY
J217- voltage • Jump start, No
supply. Refer
to
⇒ page 203 .
P0600 Serial Com‐ – Eliminate mal‐ CAN Bus no — 0.51 Sec‐ • Continu‐
munication function in message onds ous
Link Can-bus com‐
ponents ac‐ • 2 DCY
cording to the
wiring dia‐
gram ⇒ Wiring
diagrams,
Troubleshoot‐
ing & Compo‐
nent locations
P0601 Internal – Replace the Internal check — 2 Seconds • Once/
Control Engine Con‐ sum, incorrect DCY
Module trol Module
Memory (ECM) - • 2 DCY
Check Sum J623- . Refer
Error to
⇒ page 168 .
P0603 Internal – Replace the SPI communica‐ — 1.5 Sec‐ • Once/
Control Engine Con‐ tion-lost ondsor commercial purposes,
Protected by copyright. Copying for private DCY in part or in whole, is not
Module trol Module permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Keep Alive (ECM) - • 2 DCY
with respect to the correctness of information in this document. Copyright by AUDI AG.

Memory J623- . Refer

(KAM) Error to
⇒ page 168 .
P0604 Internal – Replace the • Write ability — 2 Seconds • Once/
Control Engine Con‐ check, failed 0 Seconds DCY
Module trol Module
Random (ECM) - • Check, • 2 DCY
Access J623- . Refer Failed
• Continu‐
Memory to • SW verify of ous
(RAM) Error ⇒ page 168 . EEPROM
emulation • 2 DCY
Negative

60 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0605 Internal – Replace the ROM Check, 2 Seconds • Once/
Control Engine Con‐ failed DCY
Module trol Module
Read Only (ECM) - • 2 DCY
Memory J623- . Refer • Continu‐
(ROM) Er‐ to ous
ror ⇒ page 168 .
• 2 DCY

P0606 ECM/PCM – Replace the • SPI commu‐ — 10 ms • Continu‐

Processor Engine Con‐ nication lost 2 Seconds ous
trol Module Protected by copyright. Copying for private or commercial0.2 Sec‐in part or in whole, is not
purposes,
(ECM) - • Signalunless
permitted volt‐authorised by AUDI AG. AUDI AG doesonds • 2anyDCY
not guarantee or accept liability

J623- . Refer age <4.5 toVthe correctness of information in this document.

with respect
2 Seconds • Once/
Copyright by AUDI AG.

to • Signal volt‐ 0.51 Sec‐ DCY

⇒ page 168 . age <0.5 V onds
• 2 DCY
• Boost volt‐
age-<30 or • Continu‐
75 V ous

• EEPROM • 2 DCY
check-failed
• Drive by wire
module
check-failed
• Engine tor‐
que-out of
range
• Engine oper‐
ation-out of
range
• CAN bus no
message

P0607 Control – Replace the SW functions — 0.02 Sec‐ • Continu‐

Module Engine Con‐ actuating sole‐ onds ous
Perform‐ trol Module noid valves col‐
ance (ECM) - liding of 2 substi‐ • 2 DCY
J623- . Refer tute functions
to same priority
⇒ page 168 . driven solenoid
valves have
short circuit to
supply or inter‐
ruption
P060 Watchdog – Replace the • Check Failed CAN Bus, Status OK 0 Seconds • Continu‐
A Engine Con‐ 0.2 Sec‐ ous
trol Module • CAN Feed‐ onds
(ECM) - back, Incor‐ • 2 DCY
J623- . Refer rect
to
⇒ page 168 .
P0613 TCM Pro‐ – Replace the Check Failed — 0 Seconds • Continu‐
cessor Transmission ous
Control Mod‐
ule (TCM) - • 2 DCY
J217- . Refer
to
⇒ page 205 .

5. Engine DTC Tables 61

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0614 ECM / TCM – Replace the CAN level en‐ • CAN Bus, No er‐ 0 Seconds • Continu‐
Incompati‐ Engine Con‐ gine does not fit ror and ready to ous
ble trol Module to CAN level transmit
(ECM) - transmission • 2 DCY
J623- . Refer • Ignition, Status
to on
⇒ page 168 .

– Replace the
Transmission
Control Mod‐
ule (TCM) -
J217- . Refer
to
⇒ page 205 .
P0634 PCM/ECM/ – Replace the Maximum TCU — 1.5 Sec‐ • Continu‐
TCM Inter‐ Protected
Engine Con‐
by copyright. Copyingtemperature de‐ purposes, in part or in whole, isonds
for private or commercial not ous
nal Temper‐ withtrol Module pendent on bat‐
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

ature Too
respect to the correctness of information in this document. Copyright by AUDI AG.
(ECM) - tery voltage V • 2 DCY
High J623- . Refer
to
⇒ page 168 .

– Replace the
Transmission
Control Mod‐
ule (TCM) -
J217- . Refer
to
⇒ page 205 .
P0638 Throttle Ac‐ – Check the • Duty cy‐ • Engine start- not 0.45 Sec‐ • Continu‐
tuator Con‐ Throttle Valve cle>0.4 sec. active onds ous
trol Range/ Control Mod‐ at >98°
Perform‐ ule - J338- . • ECT- 6 - 105°C • 2 DCY
ance - Bank Refer to • Actual TPS
ref point • IAT- >5°C
1 ⇒ page 118 .
<1.5° • Engine speed-
– Check the • Open to 15° <320 rpm
Throttle Posi‐ >1.275 sec. •
tion (TP) Sen‐ Vehicle speed-
Then close to <1 mph
sor - G79- / ref. point-
Accelerator >1.28 sec.
Pedal Position Gradient-
Sensor 2 - <7°/s
G185- . Refer
to • Close to
⇒ page 107 . 1.99° >1.275
sec. Then
open to ref.
point >1.28
sec. Gradi‐
ent <7°/s
• TPS 1 signal
voltage
0.208 - 0.852
V OR TPS 2
signal volt‐
age 4.158 -
4.802 V

62 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0641 Sensor Ref‐ – Check the Sensor supply Battery voltage, 0.1 Second • Continu‐
erence Volt‐ Transmission voltage to high >6.51 + 1.3 V ous
age “A” Cir‐ Control Mod‐ >10 V
cuit/Open ule (TCM) - • 2 DCY
J217- voltage
supply. Refer
to
⇒ page 203 .
P0642 Sensor Ref‐ – Check the • Short to Battery voltage, 2 Seconds • Continu‐
erence Volt‐ Transmission ground >6.51 + 1.3 V 0.1 Second ous
age A Cir‐ Control Mod‐ <4.898 V
cuit Low ule (TCM) - • 2 DCY
J217- voltage • Sensor sup‐
supply. Refer ply voltage to
to low <6.51 V
⇒ page 203 .
P0643 Sensor Ref‐ – Replace the Short to battery — 2 Seconds • Continu‐
erence Volt‐ Engine Con‐ + >5.102 V ous
age A Cir‐ trol Module
cuit High (ECM) - • 2 DCY
J623- . Refer
to
⇒ page 168 .
P0652 Sensor Ref‐ – Replace the Short to ground — 2 Seconds • Continu‐
erence Volt‐ Engine Con‐unless<4.898
authorisedVby AUDI AG. AUDI AG does not guarantee or accept any liability ous
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted
age B Cir‐ trol Module
• 2 DCY
with respect to the correctness of information in this document. Copyright by AUDI AG.
cuit Low (ECM) -
J623- . Refer
to
⇒ page 168 .
P0653 Sensor Ref‐ – Replace the Short to battery — 2 Seconds • Continu‐
erence Volt‐ Engine Con‐ + >5.102 V ous
age B Cir‐ trol Module
cuit High (ECM) - • 2 DCY
J623- . Refer
to
⇒ page 168 .
P0657 Actuator – Check the En‐ Signal voltage • Relay, comman‐ 1.5 Sec‐ • Continu‐
Supply Volt‐ gine Control >0.8 mA ded on onds ous
age A Cir‐ Module
cuit / Open (ECM) Power • 2 DCY
Supply Relay
- J271- . Refer
to
⇒ page 166 .
P0658 Actuator – Check the En‐ Signal voltage • Relay, comman‐ 1.5 Sec‐ • Continu‐
Supply Volt‐ gine Control >3.2 V ded off onds ous
age A Cir‐ Module
cuit Low (ECM) Power • 2 DCY
Supply Relay
- J271- . Refer
to
⇒ page 166 .
P0659 Supply volt‐ – Check the En‐ Signal current • Engine relay, 1.5 Sec‐ • Continu‐
age for en‐ gine Control >1 A commanded off onds ous
gine com‐ Module
ponents to (ECM) Power • 2 DCY
large Supply Relay
- J271- . Refer
to
⇒ page 166 .

5. Engine DTC Tables 63

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P0686 ECM/PCM – Check the En‐ Sense voltage • Main relay, com‐ 0.1 Second • Once/
Power Re‐ gine Control >4.0 V manded off DCY
lay Control Module
Circuit Low (ECM) Power • 2 DCY
Supply Relay
- J271- . Refer
to
⇒ page 166 .
P0687 ECM/PCM – authorised
CheckbytheAUDIEn‐ Sense voltage • or accept
Mainany relay,
liabilitycom‐ 0.1 Second • Continu‐
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless AG. AUDI AG does not guarantee
Power withRe‐
respect to thegine Control
correctness <6.0
of information V document. Copyrightmanded
in this by AUDI AG.on ous
lay Control Module
Circuit High (ECM) Power • 2 DCY
Supply Relay
- J271- . Refer
to
⇒ page 166 .
P12A Fuel Rail – Check the • Deviation • Fuel cut off, Not 5 Seconds • Continu‐
1 Pressure Fuel Pressure fuel rail pres‐ active ous
Sensor In‐ Sensor - sure control
appropri‐ G247- . Refer <-0.015 g • Engine speed, • 2 DCY
ately High to 640-3480 rpm
⇒ page 133 . • And Devia‐ • Time after engine
tion lambda
control start, >250 sec.
<-25% • High pressure
pump set point,
0.005-0.05 g
• Lambda control,
Closed loop
• EVAP canister
load, <25%

P12A Fuel Rail – Check the • Deviation • Fuel cut off, Not 5 Seconds • Continu‐
2 Pressure Fuel Pressure fuel rail pres‐ active ous
Sensor In‐ Sensor - sure control
appropri‐ G247- . Refer <-0.01 g • Engine speed, • 2 DCY
ately High to 640-3480 rpm
⇒ page 133 . • And Devia‐
tion lambda • Time after engine
control >30% start, >250 sec.
• High pressure
pump set point,
0.005-0.05 g
• Lambda control,
Closed loop
• EVAP canister
load, <25%

64 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P12A Fuel Rail – Check the • Deviation • Fuel cut off, Not 5 Seconds • Continu‐
4 Pump Con‐ Low Fuel fuel rail pres‐ active ous
trol Valve Pressure Sen‐ sure control
Stuck sor - G410- . <-0.025 g • Engine speed, • 2 DCY
Closed Refer to 640-3480 rpm
⇒ page 136 . • And Devia‐
• Time after engine
tion lambda
control -10– start, >250 sec.
10% • High pressure
pump set point,
0.005-0.05 g
• Lambda control,
Closed loop
• EVAP canister
load, <25%

DTC Error Mes‐ Diagnostic Pro‐

Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2004 Intake – Check the In‐ Signal voltage • Time after engine 8 Seconds • Continu‐
Manifold take Manifold <2.65 V start, 15 sec. ous
Runner Runner Posi‐
Control tion Sensor - • Duty cycle, Com‐ • 2 DCY
Stuck Open G336- . Refer manded open
(Bank 1) to
⇒ page 151 .
P2005 Intake – Check the In‐ Signal voltage • Time after engine 8 Seconds • Continu‐
manifold take Manifold <2.65 V start, 15 sec. ous
flap for air Runner Posi‐
stream reg‐ tion Sensor 2 - • Duty cycle, Com‐ • 2 DCY
ulation, G512- . Refer manded open
(Bank 2) to
Stuck open ⇒ page 145 . Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
P2006 Intake – Check the In‐ Signal voltage > • Time after inengine 8 Seconds • AG.
Continu‐
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information this document. Copyright by AUDI
manifold take Manifold 4 V start, 15 sec. ous
flap for air Runner Posi‐
stream reg‐ tion Sensor - • Duty cycle, Com‐ • 2 DCY
ulation, G336- . Refer manded closed
bank 1 to
Stuck ⇒ page 151 .
closed
P2007 Intake – Check the In‐ Signal voltage > • Time after engine 8 Seconds • Continu‐
manifold take Manifold 4 V start, 15 sec. ous
flap for air Runner Posi‐
stream reg‐ tion Sensor 2 - • Duty cycle, Com‐ • 2 DCY
ulation, G512- . Refer manded closed
bank 2 to
Stuck ⇒ page 145 .
closed
P2008 Intake – Check the In‐ Signal current Duty cycle, Com‐ 2 Seconds • Continu‐
Manifold take Manifold >0.8 mA manded On ous
Runner Runner Posi‐
Control Cir‐ tion Sensor - • 2 DCY
cuit/Open G336- . Refer
Bank 1 to
⇒ page 151 .

5. Engine DTC Tables 65

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2009 Intake – Check the In‐ Signal voltage Duty cycle, Com‐ 2 Seconds • Continu‐
Manifold take Manifold >2 V manded Off ous
Runner Runner Posi‐
Bank 1 tion Sensor - • 2 DCY
Short to G336- . Refer
ground to
⇒ page 151 .
P2010 Intake – Check the In‐ Signal current Duty cycle, Com‐ 2 Seconds • Continu‐
Manifold take Manifold >1 A manded On ous
Runner Runner Posi‐
Bank 1 tion Sensor - • 2 DCY
Short to G336- . Refer
Battery + to
⇒ page 151 .
P2014 Intake – Check the In‐ Signal voltage, — 2 Seconds • Continu‐
Manifold take Manifold <0.2 V ous
Runner Po‐ Runner Posi‐
sition Sen‐ tion Sensor - • 2 DCY
sor/Switch G336- . Refer
Circuit Bank to
1 ⇒ page 151 .
P2015 Intake – Check the In‐ Signal voltage • ECT, >6 °C 0.5 Sec‐ • Continu‐
Manifold take Manifold • 4.5 - 4.8 V onds ous
Runner Po‐ Runner Posi‐ • IAT, >6 °C
sition Sen‐ tion Sensor - • 0.5 - 0.2 V • 3 DCY
sor/Switch G336- . Refer
Circuit to
Range/Per‐ ⇒ page 151 .
formance
Bank 1 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
P2017 Intake – Check
permitted the In‐by Signal
unless authorised AUDI AG. voltage
AUDI AG does not guarantee — 2 Seconds
or accept any liability • Continu‐
Manifold take Manifold >4.8 V
with respect to the correctness of information in this document. Copyright by AUDI AG.
ous
Runner Po‐ Runner Posi‐
sition Sen‐ tion Sensor - • 2 DCY
sor Short to G336- . Refer
B+ to
⇒ page 151 .
P2019 Sensor for – Check the In‐ Signal voltage, — 2 Seconds • Continu‐
intake take Manifold <0.2 V ous
manifold Runner Posi‐
flap position tion Sensor 2 - • 2 DCY
2 Electrical G512- . Refer
Malfunction to
⇒ page 145 .
P2020 Sensor for – Check the In‐ Signal voltage • ECT, >6 °C 0.5 Sec‐ • Continu‐
intake take Manifold • 4.5 - 4.8 V onds ous
manifold Runner Posi‐ • IAT, >6 °C
flap position tion Sensor 2 - • 0.5 - 0.2 V • 3 DCY
2 Range/ G512- . Refer
Perform‐ to
ance ⇒ page 145 .
P2022 Intake – Check the In‐ Signal voltage — 2 Seconds • Continu‐
Manifold take Manifold >4.8 V ous
Runner Po‐ Runner Posi‐
sition Sen‐ tion Sensor 2 - • 2 DCY
sor 2 Short G512- . Refer
to Battery + to
⇒ page 145 .

66 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2088 A Camshaft – Check the Signal voltage, • Camshaft valve, 2 Seconds • Continu‐
Position Ac‐ Camshaft Ad‐ <3 V commanded off ous
tuator Con‐ justment
trol Circuit Valve 1 - • 2 DCY
Low (Bank N205- . Refer
1) to
⇒ page 183 .
P2089 A Camshaft – Check the Signal current, • Camshaft valve, 2 Seconds • Continu‐
Position Ac‐ Camshaft Ad‐ >1 A commanded on ous
tuator Con‐ justment
trol Circuit Valve 1 - • 2 DCY
High (Bank N205- . Refer
1) to
⇒ page 183 .
P2090 "B" Cam‐ – Check the Short to ground • Camshaft valve, 2 Seconds • Continu‐
shaft Posi‐ Camshaft Ad‐ <3 V commanded off ous
tion Actua‐ justment
tor Control Valve 1 (ex‐ • 2 DCY
Circuit Low haust) -
(Bank 1) N318- . Refer
to
⇒ page 183 .
P2091 "B" Cam‐ – Check the Short to battery • Camshaft valve, 2 Seconds • Continu‐
shaft Posi‐ Camshaft Ad‐ + >1 A commanded on ous
tion Actua‐ justment
tor Control Valve 1 (ex‐ • 2 DCY
Circuit High haust) -
(Bank 1) N318- . Refer
to
⇒ page 183 .
P2092 A Camshaft – Check the Signal voltage- • Camshaft valve, 2 Seconds • Continu‐
Position Ac‐ Camshaft Ad‐ <3 V commanded off ous
tuator Con‐ justment
trol Circuit Valve 2 - • 2 DCY
Low (Bank N208- . Refer
2) to
⇒ page 183 .
P2093 A Camshaft – Check the Signal current > • Camshaft valve, 2 Seconds • Continu‐
Position Ac‐ Camshaft Ad‐ 1 Amp commanded on ous
tuator Con‐ justment
trol Circuit Valve 2 - • 2 DCY
High (Bank N208- . Refer
2) to
⇒ page 183 .
P2094 "B" Cam‐ – Check the Short to ground • Camshaft valve, 2 Seconds • Continu‐
shaft Posi‐ Camshaft Ad‐ <3 V commanded off ous
tion Actua‐ justment
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability• 2 DCY
tor Control Valve 2permitted
(ex‐
with respect to the correctness of information in this document. Copyright by AUDI AG.
Circuit Low haust) -
(Bank 2) N319- . Refer
to
⇒ page 183 .
P2095 "B" Cam‐ – Check the Short to battery • Camshaft valve, 2 Seconds • Continu‐
shaft Posi‐ Camshaft Ad‐ + >1 A commanded on ous
tion Actua‐ justment
tor Control Valve 2 (ex‐ • 2 DCY
Circuit High haust) -
(Bank 2) N319- . Refer
to
⇒ page 183 .

5. Engine DTC Tables 67

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2096 Post Cata‐ – Check the Integral part of • Lambda control, 120 Sec‐ • Continu‐
lyst Fuel Heated Oxy‐ lambda control Closed loop onds ous
Trim Sys‐ gen Sensor post cat, >10%
tem Too (HO2S) - • Lambda control • 2 DCY
Lean Bank G39- . Refer post cat, Closed
1 to loop
⇒ page 159 . • Engine speed,
640-4512 rpm
– Check the
Oxygen Sen‐ • Engine load, 15 -
sor (O2S) Be‐ 70%
hind Three
Way Catalytic • Modeled catalyst
Converter temp, >400 °C
(TWC) - • whole,
Protected by copyright. Copying for private or commercial purposes, in part or in λ-set value, 0.96 -
is not
permitted unless authorised G130- . Refer
by AUDI AG.
1.04
AUDI AG does not guarantee or accept any liability
to of information in this document. Copyright by AUDI AG.
with respect to the correctness
⇒ page 162 . • Delta engine
speed, <7500
rpm/s
• Delta mass air
flow, <15 g/rev/s
• Accelerator PP
value, <1000%/s
• Mass air flow,
9.4-528 kg/h

P2097 Post Cata‐ – Check the Integral part of • Lambda control, 120 Sec‐ • Continu‐
lyst Fuel Heated Oxy‐ lambda control Closed loop onds ous
Trim Sys‐ gen Sensor post cat, <-10%
tem Too (HO2S) - • Lambda control • 2 DCY
Rich Bank 1 G39- . Refer post cat, Closed
to loop
⇒ page 159 . • Engine speed,
640-4512 rpm
– Check the
Oxygen Sen‐ • Engine load, 15 -
sor (O2S) Be‐ 70%
hind Three
Way Catalytic • Modeled catalyst
Converter temp, >400 °C
(TWC) - • λ-set value, 0.96 -
G130- . Refer 1.04
to
⇒ page 162 . • Delta engine
speed, <7500
rpm/s
• Delta mass air
flow, <15 g/rev/s
• Accelerator PP
value, <1000%/s
• Mass air flow,
9.4-528 kg/h

68 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2098 Bank 2, – Check the Integral part of • Lambda control, 120 Sec‐ • Continu‐
oxygen Heated Oxy‐ lambda control Closed loop onds ous
sensor cor‐ gen Sensor post cat, >10%
rection be‐ (HO2S) 2 - • Lambda control • 2 DCY
hind cat G108- . Refer post cat, Closed
Lean con‐ to loop
trol limit ex‐ ⇒ page 159 . • Engine speed,
ceeded 640-4512 rpm
– Check the
Oxygen Sen‐ • Engine load, 15 -
sor (O2S) 2 70%
Behind Three
Way Catalytic • Modeled catalyst
Converter temp, >400 °C
(TWC)
Protected -
by copyright. Copying for private or commercial purposes, in part or in whole, is not
• notλ-set value, 0.96 any- liability
G131- . Refer
permitted unless authorised by AUDI AG. AUDI AG does guarantee or accept
1.04
with respect to the correctness of information in this document. Copyright by AUDI AG.
to
⇒ page 162 . • Delta engine
speed, <7500
rpm/s
• Delta mass air
flow, <15 g/rev/s
• Accelerator PP
value, <1000%/s
• Mass air flow,
9.4-528 kg/h

P2099 Bank 2, – Check the Integral part of • Lambda control, 120 Sec‐ • Continu‐
oxygen Heated Oxy‐ lambda control Closed loop onds ous
sensor cor‐ gen Sensor post cat, <-10%
rection be‐ (HO2S) 2 - • Lambda control • 2 DCY
hind cat G108- . Refer post cat, Closed
Rich control to loop
limit excee‐ ⇒ page 159 . • Engine speed,
ded 640-4512 rpm
– Check the
Oxygen Sen‐ • Engine load, 15 -
sor (O2S) 2 70%
Behind Three
Way Catalytic • Modeled catalyst
Converter temp, >400 °C
(TWC) - • λ-set value, 0.96 -
G131- . Refer 1.04
to
⇒ page 162 . • Delta engine
speed, <7500
rpm/s
• Delta mass air
flow, <15 g/rev/s
• Accelerator PP
value, <1000%/s
• Mass air flow,
9.4-528 kg/h

5. Engine DTC Tables 69

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2101 Throttle Ac‐ – Check the • Duty cycle- Engine start, Not ac‐ 0.45 Sec‐ • Continu‐
tuator Con‐ Throttle Valve >0.4 sec. at tive onds ous
trol Motor Control Mod‐ >98%
Circuit ule - J338- . • 2 DCY
Range/Per‐ Refer to • And Actual
formance ⇒ page 118 . TPS-ref.
point->1.5°
• Or Actual
TPS-calc.
value->0.4 at
>8°

P2106 Throttle Ac‐ – Check the ECM power Engine start, Com‐ 0.45 Sec‐ • Continu‐
tuator Con‐ Throttle Valve stage, Failure pleted onds ous
trol System Control Mod‐
- Forced ule - J338- . • 2 DCY
Limited Refer to
Power ⇒ page 118
Protected .
by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
P2122 Throttle/ – Check withthe Signal
respect to the voltage
correctness < in this document.
of information — Copyright by0.2 AUDISec‐
AG. • Continu‐
Pedal Posi‐ Throttle Posi‐ 0.4 V onds. ous
tion Sensor/ tion (TP) Sen‐
Switch D sor - G79- / • 2 DCY
Circuit Low Accelerator
Input Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P2123 Throttle/ – Check the Signal voltage — 0.2 Sec‐ • Continu‐
Pedal Posi‐ Throttle Posi‐ >4.84 V onds. ous
tion Sensor/ tion (TP) Sen‐
Switch D sor - G79- / • 2 DCY
Circuit High Accelerator
Input Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P2127 Throttle/ – Check the Signal voltage < — 0.2 Sec‐ • Continu‐
Pedal Posi‐ Throttle Posi‐ 0.2 V onds. ous
tion Sensor/ tion (TP) Sen‐
Switch E sor - G79- / • 2 DCY
Circuit Low Accelerator
Input Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P2128 Throttle/ – Check the Signal voltage — — —
Pedal Posi‐ Throttle Posi‐ >2.8 V
tion Sensor/ tion (TP) Sen‐
Switch E sor - G79- /
Circuit High Accelerator
Input Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .

70 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2138 Throttle/ – Check the Delta signal volt‐ — 0.35 Sec‐ • Continu‐
Pedal Posi‐ Throttle Posi‐ age sensor 1 vs. onds. ous
tion Sensor/ tion (TP) Sen‐ sensor 2 >0.244
Switch D / E sor - G79- / V • 2 DCY
Voltage Accelerator
Correlation Pedal Position
Sensor 2 -
G185- . Refer
to
⇒ page 107 .
P2147 Fuel Injec‐ – Check the fuel Signal current Injection valve, Com‐ 3 Seconds • Continu‐
tor Group injectors . Re‐ >12 A manded on ous
“A” Supply fer to
Voltage Cir‐ ⇒ page 153 . • 2 DCY
cuit Low
P2148 Fuel Injec‐ – Check the fuel Signal current Injection valve, Com‐ 3 Seconds • Continu‐
tor Group injectors . Re‐ >33 A manded on ous
“A” Supply fer to
Voltage Cir‐ ⇒ page 153 . • 2 DCY
cuit High
P2150 Fuel Injec‐ – Check the fuel Signal current Injection valve, Com‐ 3 Seconds • Continu‐
tor Group injectors . Re‐ >12 A manded on ous
“B” Supply fer to
Voltage Cir‐ ⇒ page 153 . • 2 DCY
cuit Low
P2151 Fuel Injec‐ – Check the fuel Signal current Injection valve, Com‐ 3 Seconds • Continu‐
tor Group injectors . Re‐ >33 A manded on ous
"B" Supply fer to
Voltage Cir‐ ⇒ page 153 . • 2 DCY
cuit High
P2153 Fuel Injec‐ – Check the fuel Signal current Injection valve, Com‐ 3 Seconds • Continu‐
tor Group injectors . Re‐ >12 A manded on ous
"C" Supply fer to
Voltage Cir‐ ⇒ page 153 . • 2 DCY
cuit Low
P2154 Fuel Injec‐ – Check the fuel Signal current Injection valve, Com‐ 3 Seconds • Continu‐
tor Group injectors . Re‐ >33 A manded on ous
"C" Supply fer to
Voltage Cir‐ ⇒ page 153 . • 2 DCY
cuit High
P2181 Cooling – Check the En‐ • ECT <75 °C • ECT at start, -7– 500 Sec‐ • Once/
System gine Coolant 57 °C onds DCY
Perform‐ Temperature • Mass air inte‐
ance (ECT) Sensor gral 3.5–24.0 • Accum. fuel shut • 2 DCY
- G62- . Refer Kg off, <120 Sec.
to • delta ambient
⇒ page 127 . pressure, <1.5
kPa
– Check Cool‐
ant Pump - • Vehicle speed,
V50- Refer to 19 - 75 mph
Engine Me‐
Re‐ in part or in whole, is not •
chanicalpurposes,
Protected by copyright. Copying for private or commercial Mass air flow, 50–
permitted unless authorised by AUDI AG. AUDI pair Manual.
AG does not guarantee or accept any liability 200 kg/h
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Check Cool‐
ant Thermo‐
stat. Refer to
Engine Me‐
chanical Re‐
pair Manual.

5. Engine DTC Tables 71

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2195 O2 Sensor – Check the Lambda value • Lambda control- 100 sec‐ • Continu‐
Signal Heated Oxy‐ >1.1 Closed loop onds. ous
Biased/ gen Sensor
Stuck Lean (HO2S) - • Lambda control • 2 DCY
- Bank 1, G39- . Refer post cat, Closed
Sensor 1 to loop
⇒ page 159 . • ECT, >60 °C
• Engine speed,
permitted unless authorised by AUDI AG. AUDI AG does>992 rpm or accept any liability
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
not guarantee

• Engine speed de‐

with respect to the correctness of information in this document. Copyright by AUDI AG.

viation, <150 rev.

• Engine load, 30 -
300 kg/h
• Delta engine
load, <0.15 g/rev
• Lambda devia‐
tion, <3%
• Integrated mass
air flow, 150 g
• Modeled exhaust
temp, 500 - 750 °
C
• O2S signal rear,
>0.852 V
• Deviation lambda
control, >35%

72 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2196 O2 Sensor – Check the Lambda value • Lambda control- 100 sec‐ • Continu‐
Signal Heated Oxy‐ <0.9 Closed loop onds. ous
Biased/ gen Sensor
Stuck Rich - (HO2S) - • Lambda control • 2 DCY
Bank 1, G39- . Refer post cat, Closed
Sensor 1 to loop
⇒ page 159 . • ECT, >60 °C
• Engine speed,
>992 rpm
• Engine speed de‐
viation, <150 rev.
• Engine
Protected by copyright. Copying for private or commercial load,
purposes, 30
in part - whole, is not
or in
300 kg/h
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
• Delta engine
load, <0.15 g/rev
• Lambda devia‐
tion, <3%
• Integrated mass
air flow, 150 g
• Modeled exhaust
temp, 500 - 750 °
C
• O2S signal rear,
>0.049 V
• Deviation lambda
control, >35%

5. Engine DTC Tables 73

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2197 O2 Sensor – Check the Lambda value • Lambda control- 100 sec‐ • Continu‐
Signal Heated Oxy‐ >1.1 Closed loop onds. ous
Stuck Lean gen Sensor
Bank 2 Sen‐ (HO2S) 2 - • Lambda control • 2 DCY
sor 1 G108- . Refer post cat, Closed
to loop
⇒ page 159 . • ECT, >60 °C
• Engine speed,
>992 rpm
• Engine speed de‐
viation, <150 rev.
• Engine load, 30 -
300 kg/h
• Delta engine
load, <0.15 g/rev
• Lambda devia‐
tion, <3%
• Integrated mass
air flow, 150 g
• Modeled exhaust
temp, 500 - 750°
C
• O2S signal rear,
>0.852 V
• Deviation lambda
control, >35%

74 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2198 O2 Sensor – Check the Lambda value • Lambda control- 100 sec‐ • Continu‐
Signal Heated Oxy‐ <0.9 Closed loop onds. ous
Stuck Rich gen Sensor
Bank 2 Sen‐ (HO2S) 2 - • Lambda control • 2 DCY
sor 1 G108- . Refer post cat, Closed
to loop
⇒ page 159 . • ECT, >60 °C
• Engine speed,
>992 rpm
• Engine speed de‐
viation, <150 rev.
• Engine load, 30 -
300 kg/h
• Delta engine
load, <0.15 g/rev
• Lambda devia‐
tion, <3%
• Integrated mass
air flow, 150 g
• Modeled exhaust
temp, 500 - 750 °
C
• O2S signal rear,
>0.049 V
• Deviation lambda
control, >35%

P2237 O2 Sensor – Check the Signal activity O2S front-no other 65 Seconds • Continu‐
Positive Heated Oxy‐ check-failed faults ous
Current gen Sensor
Control Cir‐ (HO2S) - • 2 DCY
cuit / Open - G39- . Refer
Bank 1, to
Sensor 1 ⇒ page 159 .
P2240 O2 Sensor – Check the Signal activity O2S front-no other 65 Seconds • Continu‐
Positive Heated Oxy‐ check-failed faults ous
Current gen Sensor
Control Cir‐ (HO2S) 2 - • 2 DCY
cuit / Open - G108- . Refer
Bank 2, to
Sensor 1 ⇒ page 159 .
P2243 O2 Sensor – Check the • Functional — 130 Sec‐ • Continu‐
Reference Heated Oxy‐ check, heat‐ onds ous
Voltage Cir‐ gen Sensor er- failed
cuit Open - (HO2S) - • 2 DCY
Bank 1, G39- . Refer • And Intrusive
Sensor check, heat‐
1for private ortocommercial purposes, in part
Protected by copyright. Copying
⇒ page
permitted unless authorised by AUDI AG. AUDI 159
AG does .
not guarantee
er-failed
or in whole, is not
or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
P2247 O2 Sensor – Check the • Functional — 130 Sec‐ • Continu‐
Reference Heated Oxy‐ check, heat‐ onds ous
Voltage Cir‐ gen Sensor er- failed
cuit (Bank 2 (HO2S) 2 - • 2 DCY
Sensor 1) G108- . Refer • And Intrusive
Open to check, heat‐
⇒ page 159 . er-failed

5. Engine DTC Tables 75

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2251 O2 Sensor – Check the • Functional — 162 Sec‐ • Continu‐
Negative Heated Oxy‐ check, heat‐ onds ous
Current gen Sensor er- failed
Control Cir‐ (HO2S) - • 2 DCY
cuit (Bank 1 G39- . Refer • And Intrusive
Sensor 1) to check, heat‐
Open ⇒ page 159 . er-failed

P2254 O2 Sensor – Check the • Functional — 162 Sec‐ • Continu‐

Negative Heated Oxy‐ check, heat‐ onds ous
Current gen Sensor er- failed
Control Cir‐ (HO2S) 2 - • 2 DCY
cuit/Open G108- . Refer • And Intrusive
(Bank 2 to check, heat‐
Sensor 1) ⇒ page 159 . er-failed

P2270 O2 Sensor – Check the Signal voltage- • Fault code detec‐ 25 Seconds • Once/
Signal Oxygen Sen‐ <0.718 V While ted, P2096 or DCY
Stuck Lean sor (O2S) Be‐ stet-value 0.85 P2097 or P2098
Bank 1 Sen‐ hind Three or P2099 • 2 DCY
sor 2 Way Catalytic
Converter • O2S rear, Ready
(TWC) - • Exhaust mass airAUDI AG does not guarantee or accept any liability
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
G130- . Refer permitted unless authorised by
with respect tointegral,
AUDI AG.
>0.1 kg
to
the correctness of information in this document. Copyright by AUDI AG.

⇒ page 162 .
P2271 O2 Sensor – Check the Signal voltage- • Fault code detec‐ 25 Seconds • Once/
Signal Oxygen Sen‐ >0.298 V While ted, P2096 or DCY
Stuck Rich sor (O2S) Be‐ set-value 1.15 P2097 or P2098
Bank 1 Sen‐ hind Three or P2099 • 2 DCY
sor 2 Way Catalytic
Converter • O2S rear, Ready
(TWC) - • Exhaust mass air
G130- . Refer integral, >0.1 kg
to
⇒ page 162 .
P2272 O2 Sensor – Check the Signal voltage- • Fault code detec‐ 25 Seconds • Once/
Signal Oxygen Sen‐ <0.718 V While ted, P2096 or DCY
Stuck Lean sor (O2S) 2 stet-value 0.85 P2097 or P2098
Bank 2 Sen‐ Behind Three or P2099 • 2 DCY
sor 2 Way Catalytic
Converter • O2S rear, Ready
(TWC) - • Exhaust mass air
G131- . Refer integral, >0.1 kg
to
⇒ page 162 .
P2273 O2 Sensor – Check the Signal voltage- • Fault code detec‐ 25 Seconds • Once/
Signal Oxygen Sen‐ >0.298 V While ted, P2096 or DCY
Stuck Rich sor (O2S) 2 set-value 1.15 P2097 or P2098
Bank 2 Sen‐ Behind Three or P2099 • 2 DCY
sor 2 Way Catalytic
Converter • O2S rear, Ready
(TWC) - • Exhaust mass air
G131- . Refer integral, >0.1 kg
to
⇒ page 162 .
P2294 Fuel Pres‐ – Check the Signal current Time after engine 2 Seconds • Continu‐
sure Regu‐ Fuel Pressure <0.8 mA start, 100 - 400 sec. ous
lator 2 Con‐ Sensor -
trol Circuit G247- . Refer • 2 DCY
to
⇒ page 133 .

76 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2295 Fuel Pres‐ – Check the Signal voltage Time after engine 2 Seconds • Continu‐
sure Regu‐ Fuel Pressure <3.2 V start, 100 - 400 sec. ous
lator 2 Con‐ Sensor -
trol Circuit G247- . Refer • 2 DCY
Low to
⇒ page 133 .
P2296 Fuel Pres‐ – Check the Signal current Time after engine 2 Seconds • Continu‐
sure Regu‐ Fuel Pressure >8 Amps start, 100 - 400 sec. ous
lator 2 Con‐ Sensor -
trol Circuit G247- . Refer • 2 DCY
High to
⇒ page 133 .
P2400 Evaporative – Check the Open circuit • LDP, Comman‐ 2 Seconds • Continu‐
Emission Leak Detec‐ >0.8 mA ded on ous
System tion Pump
Leak Detec‐ (LDP) - • Engine speed • 2 DCY
tion Pump V144- . Refer >416 RPM
Control Cir‐ to
cuit/Open ⇒ page 104

– Check the
Evaporative
Emissionpermitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

(EVAP) Can‐ with respect to the correctness of information in this document. Copyright by AUDI AG.
ister System
for proper
seal. Refer to
⇒ page 100 .
P2401 Evaporative – Check the Short to ground • LDP, Comman‐ 2 Seconds • Continu‐
Emission Leak Detec‐ >2 V ded off ous
System tion Pump
Leak Detec‐ (LDP) - • Engine speed • 2 DCY
tion Pump V144- . Refer >416 RPM
Control Cir‐ to
cuit Low ⇒ page 104

– Check the
Evaporative
Emission
(EVAP) Can‐
ister System
for proper
seal. Refer to
⇒ page 100 .
P2402 Evaporative – Check the Signal current > • LDP, Comman‐ 2 Seconds • Continu‐
Emission Leak Detec‐ 1 A ded on ous
System tion Pump
Leak Detec‐ (LDP) - • Engine speed • 2 DCY
tion Pump V144- . Refer >416 RPM
Control Cir‐ to
cuit High ⇒ page 104

– Check the
Evaporative
Emission
(EVAP) Can‐
ister System
for proper
seal. Refer to
⇒ page 100 .

5. Engine DTC Tables 77

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2403 Evaporative – Check the Low signal volt‐ • LDP Comman‐ 10 Seconds • Once/
Emission Leak Detec‐ age > 1 time ded on DCY
System tion Pump Sec.
Leak Detec‐ (LDP) - • EVAP purge • 2 DCY
tion Pump V144- . Refer valve, Closed
Sense Cir‐ to • LDP, Activated
cuit/Open ⇒ page 104
• Altitude, <2500 M
– Check the
Evaporative • Number of diag‐
Emission nostic attempts, <
(EVAP) Can‐ 2
ister System • IAT, >5.25 °C
for proper
seal. Refer to • Delta ambient
⇒ page 100 . pressure, 0.3 kPa
• IAT drop after en‐
gine start, < 9.75
K
• Time after engine
start, >210–1200
Sec.
• ECT at start,
4.5-35 °C
• Vehicle speed,
>6 MPH

P2404 Evaporative – Check the High signal volt‐ • LDP Comman‐ 10 Seconds • Once/
Emission Leak Detec‐ age > 0.36 time ded on DCY
System tion Pump Sec.
Leak Detec‐ (LDP) - • EVAP purge • 2 DCY
tion Pump V144- . Refer valve, Closed
Sense to • LDP, Activated
Range/Per‐ ⇒ page 104
formance • Altitude, <2500 M
– Check the
Evaporative • Number of diag‐
Emission nostic attempts, <
(EVAP) Can‐ 2
ister System • IAT, >5.25 °C
for proper
seal. Refer to • Delta ambient
⇒ page 100 . pressure, 0.3 kPa
• IAT drop after en‐
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
gineinstart,
with respect to the correctness of information < 9.75
this document. Copyright by AUDI AG.
K
• Time after engine
start, >210–1200
Sec.
• ECT at start,
4.5-35 °C
• Vehicle speed,
>6 MPH

78 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
P2414 O2 Sensor – Check the O2S signal front • Lambda control, 25 Seconds • Continu‐
Exhaust Heated Oxy‐ >3.1 V Active ous
Sample Er‐ gen Sensor
ror Bank 1, (HO2S) - • Engine torque, • 2 DCY
Sensor 1 G39- . Refer Positive
to • Engine speed,
⇒ page 159 . No idle

P2415 O2 Sensor – Check the O2S signal front • Lambda control, 25 Seconds • Continu‐
Exhaust Heated Oxy‐ >3.1 V Active ous
Sample Er‐ gen Sensor
ror Bank 2, (HO2S) 2 - • Engine torque, • 2 DCY
Sensor 1 G108- . Refer Positive
to • Engine speed,
⇒ page 159 . No idle

P2539 Low Pres‐ – Check Low Signal voltage > — 2 Seconds • Continu‐
sure Fuel Fuel Pressure 4.8 V ous
System Sensor -
Sensor Cir‐ G410- . Refer • 2 DCY
cuit to
⇒ page 136 .
P2540 Low Pres‐ – Check Low Actual pressure • Engine speed, 5 Seconds • Continu‐
sure Fuel Fuel Pressure <0.08 or >0.8 500-6000 rpm ous
System Sensor - Mpa
Sensor Cir‐ G410- . Refer • Time after engine • 2 DCY
cuit Range/ to start, >30 sec.
Perform‐ ⇒ page 136 .
ance
P2541 Low Pres‐ – Check Low Signal voltage < — 5 Seconds • Continu‐
sure Fuel Fuel Pressure 0.2 V ous
System Sensor -
Sensor Cir‐ G410- . Refer • 2 DCY
cuit Low to
⇒ page 136 .
P2626 O2 Sensor – Check the O2S signal front • Fuel cut off, >2 4 Seconds • Continu‐
Pumping Heated Oxy‐ >4.7 V sec. ous
Current gen Sensor
Trim Circuit/ (HO2S) - • Modeled exhaust • 2 DCY
Open Bank G39- . Refer gas temp, >380 °
1 Sensor 1 to C
⇒ page 159 .
P2629 O2 Sensor – Check the O2S signal front • Fuel cut off, >2 4 Seconds • Continu‐
Pumping Heated Oxy‐ >4.7 V sec. ous
Current gen Sensor
Trim Circuit/ (HO2S) 2 - • Modeled exhaust • 2 DCY
Open Bank G108- . Refer gas temp, >380 °
2 Sensor 1 to C
⇒ page 159 .
P3081 Engine – Check the En‐ • Step 1 mod‐ Step 1 passed 2 Seconds • Continu‐
Tempera‐ gine Coolant eled ECT ous
ture Too Temperature >40 °C Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Low (ECT) Sensor • 2 DCY
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

- G62- . Refer • And ECT<40with respect to the correctness of information in this document. Copyright by AUDI AG.

to °C
⇒ page 127 .

5. Engine DTC Tables 79

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time checks, MIL
Threshold Value Conditions Length Illum
U000 High Speed – Check the • CAN mes‐ • battery voltage, 0.3 Sec‐ • Continu‐
1 CAN Com‐ CAN-Bus ter‐ sage, No >9 V onds ous
munication minal resist‐ feedback 0.06 Sec‐
Bus ance. Refer to • Delay after igni‐ onds • Immed.
⇒ page 174 . • CAN level, tion on, 0.5 Sec.
Incorrect
• Ignition status,
On

U010 Lost Com‐ – Check the No message re‐ • CAN Bus, No er‐ 0.5 Sec‐ • Continu‐
0 munication CAN-Bus ter‐ ceived from ror and ready to onds ous
With ECM/ minal resist‐ DME, Timeout transmit
PCM “A” ance. Refer to • 2 DCY
⇒ page 174 . • Delay after igni‐
tion on, 0.53 Sec.
• Battery voltage,
>9 V

U010 Lost Com‐ – CAN-Bus ter‐ CAN message, — 0.51 Sec‐ • Continu‐
1 munication minal resist‐ No message onds ous
with TCM ance, Trans‐
mission Con‐ • 2 DCY
trol Module
(TCM) - J217-
to Engine
Control Mod‐
ule (ECM) -
J623- . Refer
to
⇒ page 174 .
U030 Software In‐ – Replace the AT vehicle ECM 5 sec. • Continu‐
2 compatibili‐ Transmission coded as MT ve‐ ous
ty with Control Mod‐ hicle
Transmis‐ ule (TCM) - • 2 DCY
sion Control J217- . Refer
Module to
⇒ page 205 .
U040 Invalid Data – Replace the Invalid data. • CAN Bus, No er‐ 0.5 Sec‐ • Continu‐
1 Received Engine Con‐ ror and ready to onds ous
From ECM/ trol Module transmit
PCM (ECM) - • 2 DCY
J623- . Refer • Delay after igni‐
to tion on, 0.53 Sec.
⇒ page 168 . • Battery voltage,
>9 V

U040 Invalid Data – CAN-Bus ter‐ AT vehicle ECM 5 Sec. • Continu‐

2 Received minal resist‐ coded as MT ve‐ ous
from Trans‐ ance, Trans‐ hicle
mission mission Con‐ CAN message • 2 DCY
Control trol Module Implausible
Module (TCM) - J217- message
to Engine
Control Mod‐
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

ule (ECM) -
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
J623- . Refer
to
⇒ page 174 .

80 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

6 Transmission DTC Tables

♦ ⇒ “6.1 Transmission Control Module , 09L”, page 81

6.1 Transmission Control Module , 09L

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P070 Transmis‐ – Check Multi- • Sensor supply, > 0.1 Seconds • Continu‐
5 sion Range Function 6.51–<10 V ous
Sensor Cir‐ Transmission
cuit Mal‐ Range (TR) • Status, OK • 2 DCY
function Switch - F125-
(PRNDL In‐ ⇒ page 196 .
put)
P070 Transmis‐ – Check Multi- 4 bit position • Sensor supply, > 0.1 Seconds • Continu‐
6 sion Range Function code, incorrect 6.51–<10 V ous
Sensor ”A” Transmission
Circuit Range (TR) • Status, OK • 2 DCY
Range/Per‐ Switch - F125-
formance ⇒ page 196 .
P070 Transmis‐ – Check Multi- • Sensor supply, > 0.1 Seconds • Continu‐
7 sion Range Function 6.51–<10 V ous
Sensor Cir‐ Transmission
cuit Low Range (TR) • Status, OK • 2 DCY
Switch - F125-
⇒ page 196 .
P070 Transmis‐ – Check Multi- • Sensor supply, > 0.1 Seconds • Continu‐
8 sion Range Function 6.51–<10 V ous
Sensor Cir‐ Transmission
cuit High Range (TR) • Status, OK • 2 DCY
Switch - F125-
⇒ page 196 .
P071 Transmis‐ – Check ATF Sensor short cir‐ — 1.5 Seconds • Continu‐
0 sion Fluid level: Refer to cuit: ous
Tempera‐ Transmission • U_sensor
ture Sensor Repair Man‐ (+), and • 2 DCY
”A” Circuit ual U_sensor (-)
diagnosis by
– Check the ASIC
Transmission
Fluid Temper‐
ature Sensor -
G93- . Refer
to
⇒ page 199 .
P071 Transmis‐ – Check ATF Discontinual • Temperature 1.5 Seconds • Continu‐
1 sion Fluid level: Refer to temperature: fault, no other ous
Tempera‐ Transmission • ATF temper‐ fault detected
ture Sensor Repair Man‐ ature delta T • 2 DCY
”A” Circuit ual. between 2 • Chip tempera‐
Range/Per‐ measure‐ ture, status OK
formance – Check the ments, >20° • Engine speed or
Transmission C input speed, >
Fluid Temper‐ 400 RPM
ature Sensor - Sensor stuck:
• Comparision
G93- . ReferProtected by copyright. Copying• for Signal status, purposes, in part or in whole, is not
to ATF vs. chip
permitted unless authorised by AUDI
private or commercial
status,
AG. AUDIOK AG does not guarantee or accept any liability
temperature,
⇒ page 199 . with respect to the correctness of information in this document. Copyright by AUDI AG.
ATF temp.
must follow
chip temp. in
certain rang‐
es, 25-40 °C

6. Transmission DTC Tables 81

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P071 Transmis‐ – Check ATF Circuit low: — 1.5 Seconds • continu‐
2 sion Fluid level: Refer to • U_sensor ous
Tempera‐ Transmission (+), and
ture Sensor Repair Man‐ U_sensor (-) • 2 DCY
”A” Circuit ual. diagnosis by
Low ASIC
– Check the
Transmission
Fluid Temper‐
ature Sensor -
G93- . Refer
to
⇒ page 199 .
P071 Transmis‐ – Check ATF Circuit high: — 1.5 Seconds • continu‐
3 sion Fluid level: Refer to • U_sensor ous
Tempera‐ Transmission (+), and
ture Sensor Repair Man‐ U_sensor (-) • 2 DCY
”A” Circuit ual. diagnosis by
High ASIC
– Check the
Transmission
Fluid Temper‐
ature Sensor -
G93- . Refer
to
⇒ page 199 .
P071 Transmis‐ – Check ATF Circuit high: — 1.5 Seconds • continu‐
4 sion Fluid level: Refer to • U_sensor ous
Tempera‐ Transmission (+), and
ture Sensor Repair Man‐ U_sensor (-) • 2 DCY
”A” Circuit ual. diagnosis by
Intermittent ASIC
– Check the
Transmission
Fluid Temper‐
ature Sensor -
G93- . Refer
to
⇒ page 199 .

82 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P071 Input/Tur‐ – Check the Signal higher or Higher: 0.6 Seconds • Continu‐
6 bine Speed Transmission lower than • Sensor supply, ous
Sensor ”A” Input Speed threshold OK
Circuit (RPM) Sensor • Higher, > + • 2 DCY
Range/Per‐ - G182- . Re‐ 8000 RPM • Sensor, no elec‐
formance fer to trical error
⇒ page 197 . • Lower, < 20 Lower:
RPM
• Sensor supply,
OK
• Engine speed,
>600 RPM
• Status engine
speed, OK
• Output speed,
>500 RPM
• Status output
speed, OK or
substitute value
• Range position,
OK or substitute
value
• Sensor, no elec‐
trical error
• Transmission
condition, friction-
locked
• Error flag
fnabvra_err, not
set

P071 Input/Tur‐ – Check the Hardware de‐ Sensor supply, OK 0.6 Seconds • Continu‐
7 bine Speed Transmission tection ous
Sensor ”A” Input Speed
Circuit No (RPM) Sensor • 2 DCY
Signal - G182- . Re‐
fer to
⇒ page 197 .

6. Transmission DTC Tables 83

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P072 Output Check
– the • Signal> • Sensor supply, • 0.8 Sec‐ • Continu‐
1 Speed Sen‐ Transmission threshold, > OK onds ous
sor Circuit Output Speed 10000 RPM
Range/Per‐ (RPM) Sensor • Sensor, no elec‐ • 1 Second • 2 DCY
formance - G195- . Re‐ • Difference trical error
fer to between last
and actual • Transmission
⇒ page 198 . condition, friction-
value
>threshold, locked
-1000 RPM • Input speed sen‐
• Difference to sor, OK
wheel • Difference be‐
speeds, > tween output
500 RPM speed and input
and input speed, > 200
speed, > 200 RPM
RPM
• Transmission
condition, friction-
locked back‐
wards or for‐
wards
• Shift flag, = 0 (no
shift)
• Input speed, OK
• Sensor supply,
OK
• Wheel speeds,
OK

P072 Output – Protected

Checkbythe Hardware
copyright. Copying de‐or commercial
for private Sensor supply,
purposes, in partOK 0.6isSeconds
or in whole, not • Continu‐
2 Speed Sen‐ Transmission tection
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability ous
sor Circuit Output Speed
with respect to the correctness of information in this document. Copyright by AUDI AG.

No Signal (RPM) Sensor • 2 DCY

- G195- . Re‐
fer to
⇒ page 198 .
P072 Engine – Check the wir‐ CAN message • Ignition, on 1 Second • Continu‐
7 Speed Input ing connec‐ signal error flag, ous
Circuit No tion Between =1 • CAN Bus, OK
Signal Engine Con‐ • Immedi‐
• DME CAN con‐ ate
trol Module nection, OK
(ECM) - J623-
and the
Transmission
Control Mod‐
ule (TCM) -
J217- .

– Check the En‐

gine Speed
(RPM) Sensor
- G28- . Refer
to
⇒ page 122 .

84 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P074 Torque – Check the En‐ rate of (setting of status of clutch, 15 Seconds • continu‐
1 Converter gine Speed nominal value) - closed or closed loop ous
Clutch Cir‐ (RPM) Sensor actual value, > control
cuit Per‐ - G28- . Refer 50 RPM • 2 DCY
formance or to
Stuck Off ⇒ page 122 .

– Check the
Transmission
Input Speed
(RPM) Sensor
- G182- . Re‐
fer to
⇒ page 197 .

– Check the Au‐

tomatic Trans‐
mission Pres‐
sure Regulat‐
ing Valve 6 -
N371- . Refer
to
⇒ page 201 .
P074 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
6 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid 'A” mission Pres‐ 100% activated
Perform‐ sure Regulat‐ • 2 DCY
ance or ing Valve 1 - • Power supply, >
Stuck Off N215- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

P074 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
7 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid 'A” mission Pres‐ 100% activated
Stuck On sure Regulat‐ • 2 DCY
ing Valve 1 - • Power supply, >
N215- . Refer 8.7 V
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
to • Voltage drop at
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
⇒ page 201 . with respect to the correctness of information in this document. Copyright by AUDI AG.
FET, < = 1 V
• Solenoid supply,
>9V

6. Transmission DTC Tables 85

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P074 Pressure – Check the Au‐ • Current high‐ • Off operation 0.05 Sec‐ • Continu‐
8 Control Sol‐ tomatic Trans‐ er or lower mode onds ous
enoid 'A” mission Pres‐ than thresh‐
Electrical sure Regulat‐ old, > 220 • 2 DCY
ing Valve 1 - mA
N215- . Refer
to • EDS output
⇒ page 201 . voltage at
short to
ground or
open circuit ~
0,5 V smaller
than EDS
supply volt‐
age
• Static leak‐
age current
flow

P075 Shift Sole‐ – Check the • If PWM = • high side FET 0.05 Sec‐ • Continu‐
1 noid ”A” Solenoid 0%, diagno‐ voltage drop, < = onds ous
Perform‐ Valve 1 - sis by ASIC 1V
ance or N88- . Refer to • 2 DCY
Stuck Off ⇒ page 200 . • if 0% < = • high side FET,
PWM , 7.6% enabled
voltage re‐
turn lead • low side FET, en‐
(low), < 0.75 abled
V
• if 7.6% < =
PWM
Protected by copyright. Copying for private ,
or commercial purposes, in part or in whole, is not
92.4% volt‐
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

age return
with respect to the correctness of information in this document. Copyright by AUDI AG.

lead (high), <

0.75 V
• if 7.6% < =
PWM ,
92.4% volt‐
age return
lead (low), <
0.75 V

P075 Shift Sole‐ – Check the • If PWM = • high side FET 0.05 Sec‐ • Continu‐
2 noid Stuck Solenoid 100%, diag‐ voltage drop, < = onds ous
On Valve 1 - nosis by 1V
N88- . Refer to ASIC • 2 DCY
⇒ page 200 . • high side FET,
• if 7.6% < = enabled
PWM <=
100% volt‐ • low side FET, en‐
age return abled
lead (high),
>0.3 V

86 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P075 Shift Sole‐ – Check the • If PWM = • high side FET 0.05 Sec‐ • Continu‐
4 noid "A" In‐ Solenoid 0%, diagno‐ voltage drop, < = onds ous
termittent Valve 1 - sis by ASIC 1V
N88- . Refer to • 2 DCY
⇒ page 200 . • if 0% < = • high side FET,
PWM , 7.6% enabled
voltage re‐
turn lead • low side FET, en‐
(low), < 0.75 abled
V
• if Protected
7.6% <by=copyright. Copying for private or commercial purposes, in part or in whole, is not
PWM , unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
permitted
92.4% volt‐
with respect to the correctness of information in this document. Copyright by AUDI AG.

age return
lead (high), <
0.75 V
• if 7.6% < =
PWM ,
92.4% volt‐
age return
lead (low), <
0.75 V

P077 Pressure – Check ATF PWM hardware • Low side and 0.05 Sec‐ • Continu‐
6 Control Sol‐ level: Refer to detection, 0 or high side FET, onds ous
enoid ”B” Transmission 100% activated
Perform‐ Repair Man‐ • 2 DCY
ance or ual. • Power supply, >
Stuck Off 8.7 V
– Check the Au‐ • Voltage drop at
tomatic Trans‐ FET, < = 1 V
mission Pres‐
sure Regulat‐ • Solenoid supply,
ing Valves . >9V
Refer to
⇒ page 201 .
P077 Pressure – Check ATF PWM hardware • Low side and 0.05 Sec‐ • Continu‐
7 Control Sol‐ level: Refer to detection, 0 or high side FET, onds ous
enoid ”B” Transmission 100% activated
Stuck On Repair Man‐ • 2 DCY
ual. • Power supply, >
8.7 V
– Check the Au‐ • Voltage drop at
tomatic Trans‐ FET, < = 1 V
mission Pres‐
sure Regulat‐ • Solenoid supply,
ing Valves . >9V
Refer to
⇒ page 201 .

6. Transmission DTC Tables 87

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P077 Pressure – Check ATF • Current high‐ • Off operation 0.05 Sec‐ • Continu‐
8 Control Sol‐ level: Refer to er or lower mode onds ous
enoid ”B” Transmission than thresh‐
Electrical Repair Man‐ old, <730 mA • 2 DCY
ual.
• EDS output
– Check the Au‐ voltage at
tomatic Trans‐ short to
mission Pres‐ ground or
sure Regulat‐ open circuit ~
ing Valves . 0,5 V smaller
Refer to than EDS
⇒ page 201 . supply volt‐
age
• Static leak‐
age current
flow

P079 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
6 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”C” mission Pres‐ 100% activated
Perform‐ sure Regulat‐ • 2 DCY
ance or ing Valve 3 - • Power supply, >
Stuck Off N217- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI •AG does Solenoid supply,
not guarantee or accept any liability
>document.
with respect to the correctness of information in this 9 V Copyright by AUDI AG.

P079 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
7 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”C” mission Pres‐ 100% activated
Stuck On sure Regulat‐ • 2 DCY
ing Valve 3 - • Power supply, >
N217- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

P079 Pressure – Check the Au‐ • Current high‐ • Off operation 0.05 Sec‐ • Continu‐
8 Control Sol‐ tomatic Trans‐ er or lower mode onds ous
enoid ”C” mission Pres‐ than thresh‐
Electrical sure Regulat‐ old, >220 mA • 2 DCY
ing Valve 3 -
N217- . Refer • EDS output
to voltage at
⇒ page 201 . short to
ground or
open circuit ~
0,5 V smaller
than EDS
supply volt‐
age
• Static leak‐
age current
flow

88 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P088 TCM Power – Check the Au‐ FET drive, not • Filtered battery 0.03 Sec‐ • Continu‐
9 Relay tomatic Trans‐ possible voltage, >6.75 V onds ous
Sense Cir‐ mission Pres‐
cuit Range/ sure Regulat‐ • High side and low • 2 DCY
Perform‐ ing Valves . side FET, ena‐
ance Refer to bled
⇒ page 201 . • Status counter in‐
itialization, 0 or 1
– Check the
Solenoid
Valve 1 -
N88- . Refer to
⇒ page 200 .
P089 TCM Power – Check the Au‐ • Solenoid • Filtered battery 0.03 Sec‐ • Continu‐
0 Relay tomatic Trans‐ power supply voltage, >6.75 V onds ous
Sense Cir‐ mission Pres‐ voltage, <1.4
cuit Low sure Regulat‐ V • High side and low • 2 DCY
ing Valves . side FET, ena‐
Refer to • Drop voltage bled
⇒ page 201 . over high
side FET, > 1 • Status counter in‐
V itialization, 0 or 1
– Check the
Solenoid
Valve 1 -
N88- . Refer to
⇒ page 200 .
P089 TCM Power – Check the Au‐ Hardware de‐ • Filtered battery 0.03 Sec‐ • continu‐
1 Relay tomatic Trans‐ tection voltage, >6.75 V onds ous
Sense Cir‐ mission Pres‐
cuit High sure Regulat‐ • High side and low • 2 DCY
ing Valves . side FET, ena‐
Refer to bled
⇒ page 201 . • Status counter in‐
itialization, 0 or 1
– Check the
Solenoid
Valve 1 -
N88- . Refer to
⇒ page 200 .
P089 TCM Power – Check the Au‐ Hardware de‐ • Filtered battery 0.03 Sec‐ • continu‐
2 Relay tomatic Trans‐ tection voltage, >6.75 V onds ous
Sense Cir‐ mission Pres‐
cuit Inter‐ sure Regulat‐ • High side and low • 2 DCY
mittent ing Valves . side FET, ena‐
Refer to bled
⇒ page 201 . • Status counter in‐
itialization, 0 or 1
– Check the
Solenoid
Valve 1 -
N88- . Refer to
⇒ page 200 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
P170 Impossible – Replace
permitted unless authorised by the
AUDI AG.SW AUDI functions:
AG does not guarantee or accept ---
any liability 0.02 Sec‐ • Continu‐
2 combina‐ Transmission actuating sole‐
with respect to the correctness of information in this document. Copyright by AUDI AG.
onds ous
tion of sub‐ Control Mod‐ noid valves col‐
stitute func‐ ule (TCM) - liding with 2 sub‐ • 2 DCY
tions or not J217- . Refer stitute functions
allowed ac‐ to with same prior‐
tuating of ⇒ page 205 . ity as driven sol‐
valves enoid valves
that have short
circuit to supply
or interruption

6. Transmission DTC Tables 89

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P263 Torque – Check the CAN message • Ignition, on 0.5 Seconds • Continu‐
7 manage‐ CAN-Bus ter‐ signal error flag, ous
ment Feed‐ minal resist‐ =1 • CAN Bus, OK
back Signal ance, Trans‐ • 2 DCY
• DME CAN con‐
”A” mission Con‐ nection, OK
trol Module
(TCM) - J217-
to Engine
Control Mod‐
ule (ECM) -
J623- . Refer
to
⇒ page 174 .
P271 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
4 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”D” mission Pres‐ 100% activated
Perform‐ sure Regulat‐ • 2 DCY
ance or ing Valve 4 - • Power supply, >
Stuck off N218- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

P271 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
5 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”D” Protected
mission Pres‐
by copyright. Copying100% activated
for private or commercial purposes, in part or in whole, is not
Stuck On permitted
sure Regulat‐
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability • 2 DCY
ing Valve 4 - • Power
with respect to the correctness of information in this document. supply,
Copyright by AUDI>AG.

N218- . Refer 8.7 V

to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

P271 Pressure – Check the Au‐ • Current high‐ • Off operation 0.05 Sec‐ • Continu‐
6 Control Sol‐ tomatic Trans‐ er or lower mode onds ous
enoid ”D” mission Pres‐ than thresh‐
Electrical sure Regulat‐ old, <730 mA • 2 DCY
ing Valve 4 -
N218- . Refer • EDS output
to voltage at
⇒ page 201 . short to
ground or
open circuit ~
0,5 V smaller
than EDS
supply volt‐
age
• Static leak‐
age current
flow

90 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P272 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
3 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”E” mission Pres‐ 100% activated
Perform‐ sure Regulat‐ • 2 DCY
ance or ing Valve 5 - • Power supply, >
Stuck off N233- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

P272 Pressure – Check the Au‐ • Current high‐ • Off operation 0.05 Sec‐ • Continu‐
5 Control Sol‐ tomatic Trans‐ er or lower mode onds ous
enoid "E" mission Pres‐ than thresh‐
Electrical sure Regulat‐ old, <730 mA • 2 DCY
ing Valve 5 -
N233- . Refer • EDS output
to voltage at
⇒ page 201 . short to
ground or
open circuit ~
0,5 V smaller
than EDS
supply volt‐
age
• Static leak‐
age current
flow

P273 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
2 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”F” mission Pres‐ 100% activated
Perform‐ sure Regulat‐ • 2 DCY
ance or ing Valve 6 - • Power supply, >
Stuck off N371- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

P273 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
3 Control Sol‐ tomatic Trans‐ detection, 0 or high side FET, onds ous
enoid ”F” mission Pres‐ 100% activated
Stuck On sure Regulat‐ • 2 DCY
ing Valve 6 - • Power supply, >
N371- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
> 9is V
Protected by copyright. Copying for private or commercial purposes, in part or in whole, not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

6. Transmission DTC Tables 91

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

DTC Error Mes‐ Diagnostic Pro‐ Malfunction Cri‐ Secondary Parame‐ Monitoring Frequency of
sage cedure teria and ters with Enable Time Length checks, MIL
Threshold Value Conditions Illum
P273 Pressure – Check the Au‐ • EDS output • Off operation 0.05 Sec‐ • Continu‐
4 Control Sol‐ tomatic Trans‐ voltage at mode onds ous
enoid "F" mission Pres‐ short to
Electrical sure Regulat‐ ground or • 2 DCY
ing Valve 6 - open circuit ~
N371- . Refer 0,5 V smaller
to than EDS
⇒ page 201 . supply volt‐
age
• Static leak‐
age current
flow

P273 Pressure – Check the Au‐ PWM hardware • Low side and 0.05 Sec‐ • Continu‐
5 Control
ProtectedSol‐ tomatic
by copyright. Trans‐
Copying for private ordetection, 0 or in part orhigh
commercial purposes, side
in whole, FET,
is not onds ous
enoid "F" unless
permitted In‐ authorised
mission Pres‐
by AUDI 100%
AG. AUDI activated
AG does not guarantee or accept any liability
termittent sure Regulat‐
with respect to the correctness of information in this document. Copyright by AUDI AG. • 2 DCY
ing Valve 6 - • Power supply, >
N371- . Refer 8.7 V
to • Voltage drop at
⇒ page 201 . FET, < = 1 V
• Solenoid supply,
>9V

92 Rep. Gr.ST - Generic Scan Tool

Audi A4 2005 ➤
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20 – Fuel Supply
1 Fuel Supply
⇒ “1.1 Safety Precautions”, page 93
⇒ “1.2 Clean Working Conditions”, page 94
⇒ “1.3 Fuel System, Bleeding”, page 94
⇒ “1.4 Fuel Pump Delivery Quantity, Checking”, page 94
⇒ “1.5 Fuel Pump Electrical, Checking”, page 97
For all Fuel Supply system component locations.
For all Fuel supply system removal/installation procedures and
torque specifications.
Check the Technical Bulletins for information that may supersede
any information included in this manual.

Note

♦ All manufacturers special tools as well as common tools may

1.1 Safety Precautions

WARNING

♦ The fuel system is under pressure! Before opening the

system, place rags around the connection area. Then re‐
lease the pressure by carefully loosening the connection.
♦ The engine section of the fuel system, after the high pres‐
sure pump, is under extremely high pressure! When work‐
ing on the engine or the fuel injection system, the pressure
must be relieved to residual pressure before opening the
high pressure components.
♦ Place sources of flame, e.g. cigarette lighters, as well as
those sources of others in the area, out of reach. These
can ignite fuel vapors.
♦ The use of nails, paper clips, or another unauthorized ma‐
terials to back-probe electrical harness connectors is
strictly prohibited and may cause damage to the electrical
harness connectors, terminal ends or damage to a com‐
ponent. Use only the manufacturers test lead kit or an
equivalent aftermarket test lead kit for back-probing
Protected all
by copyright. Copying for private or commercial purposes, in part or in whole, is not
electrical harness connectors. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

Perform the following steps before beginning work on the fuel

supply system:

1. Fuel Supply 93
Audi A4 2005 ➤
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♦ Disconnect the battery Ground (GND) cable with the ignition

switched off.
♦ Open the fuel filler flap briefly and then close again.
When removing and installing components from full or partially full
fuel tanks, observe the following:
♦ The fuel tank must only be partially full. How much fuel can
remain in the fuel tank may be read in the respective work
description. Empty the fuel tank if necessary .
♦ Before starting work, switch on the exhaust extraction system
and place an extraction hose close to the installation opening
of the fuel tank to extract escaping fuel fumes. If no exhaust
extraction system is available, a radial fan (as long as motor
is not in air flow) with a displacement greater than 15 m3/h can
be used.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
♦ Prevent fuel from contacting the skin! Wear fuel-resistant
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

gloves!
with respect to the correctness of information in this document. Copyright by AUDI AG.

Observe the following when removing and installing the fuel tank:
♦ Empty the fuel tank for weight reasons.

1.2 Clean Working Conditions

When working on the fuel supply/injection system, pay careful at‐
tention to the following rules of cleanliness:
♦ Thoroughly clean all connections and the surrounding area
before disconnecting.
♦ Place parts that have been removed on a clean surface and
cover them. Do not use fluffy cloths!
♦ Carefully cover over opened components or seal, if repairs are
not performed immediately.
♦ Only install clean components: Only unpack replacement
parts immediately prior to installation. Do not use parts that
have been stored unpacked (e.g. in tool boxes etc.).
♦ When the system is open: Do not work with compressed air.
Do not move vehicle unless absolutely necessary.

1.3 Fuel System, Bleeding

To prevent damage to the catalytic converter the fuel system must
be bled after repair work on fuel lines or on the fuel filter.
Fuel system, bleeding Refer to Fuel Injection and Ignition Repair
Manual.

1.4 Fuel Pump Delivery Quantity, Checking

Special tools and workshop equipment required
♦ Hand held remote control (jumper) .
♦ Multimeter .
♦ Electrical connector test lead set .
♦ Pressure gauge (High pressure)
♦ Measuring container (fuel resistant).
Test conditions
• Battery voltage at least 12.5 V.
• The fuel filter OK
• Fuse - S228- OK.

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Audi A4 2005 ➤
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• Fuel Pump (FP) Control Module - J538- OK. Refer to Fuel In‐
jection and Ignition Repair Manual.
• Fuel tank at least 1/4 filled.
• The ignition switched off.
Test sequence
– Remove the rear seat bench Refer to Body Interior Repair
Manual.
– Remove the right locking flange cover and bolts-arrows-.

– Disconnect the electrical harness connector -arrow- at the

right locking flange.
– Connect a Hand held remote control (jumper) to terminal -1-
of the fuel delivery unit and to vehicle battery (+).

– Connect a jumper cable from a Electrical connector test lead

set to terminal -4- of the fuel delivery unit and to vehicle Ground
(GND).
– Remove the fuel filler cap.

– Remove the rear engine cover -arrows-.

WARNING

The fuel system is under pressure! Before opening system,

place rags around the connection area. Then release pressure
by carefully loosening the connection.

1. Fuel Supply 95
Audi A4 2005 ➤
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– Disconnect the fuel line -arrow-.

– Connect a Pressure gauge (High pressure) to the fuel line.
– Connect the extension hose -arrow- to the pressure gauge and
hold it in a measuring container.
– Open the pressure gauge shut-off valve. The lever points in
the direction of flow.
– Create fuel system pressure by pressing the switch on the
Hand held remote control (jumper) in and slowly closing the
shut-off valve of the pressure gauge.

– Pump the fuel into the

• Specification: 4 bar positive pressure.
– Do not move the position of the shut-off valve.
– Empty the measuring container.

– Press the switch on the Hand held remote control (jumper) in

for 15 seconds.
– Compare the quantity of fuel delivered with the minimum de‐
livery rate in the diagram (cm3/15s).

Note

Voltage at the fuel pump with the engine stopped and the pump
running is approx. 2 volts less than the battery voltage.

If the minimum delivery quantity is not obtained, the following

malfunctions may be present:
♦ Fuel lines pinched. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
♦ Fuel filter clogged. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
♦ Fuel pump faulty.
Installation

– Connect the fuel line -arrow-.

96 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
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– Install the rear engine cover -arrows-.

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Connect the electrical harness connector
with respect to the -arrow-
correctness at the rightin this document. Copyright by AUDI AG.
of information
locking flange.

– Install the right locking flange cover and bolts-arrows-.

– install the rear seat bench Refer to Body Interior Repair Man‐
ual.
Torque specifications
Component Nm
Fuel line to fuel rail 22

1.5 Fuel Pump Electrical, Checking

Special tools and workshop equipment required
♦ Hand held remote control (jumper) .
♦ Multimeter .
♦ Electrical connector test lead set .
♦ Pressure gauge (High pressure)
Test conditions
• Battery voltage at least 12.5 V.
• The fuel pump fuse OK.
• The Fuel Pump (FP) Control Module - J538- OK.
• The fuel filter OK
• The ignition switched off.
Test sequence
– Remove the rear seat bench.

1. Fuel Supply 97
Audi A4 2005 ➤
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– Remove the right locking flange cover and bolts-arrows-.

– Disconnect the electrical harness connector -arrow- at the

right locking flange.
– Connect a Hand held remote control (jumper) to terminal -1-
of the fuel delivery unit and to vehicle battery (+).

– Connect a jumper cable from a Electrical connector test lead

set to terminal -4- of the fuel delivery unit and to vehicle Ground
(GND).
– Press the switch on the Hand held remote control (jumper) in.

Note

The Fuel Pump (FP) runs quietly. Avoid surrounding noises while
testing the fuel pump.

The fuel pump must run and an audible noise of the fuel pump
running should be heard.
If no operating noise can be heard:

98 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
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– Using a Multimeter , check the electrical circuit between ter‐

minals -1- and -5- of the fuel delivery unit for continuity.
Specified value: 0 ohms.
If a malfunction is detected in the electrical circuit:
– Check the wiring for a short circuit to Battery positive (+) or an
open circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the electrical circuit.
If no malfunction is detected in the wiring, replace the fuel pump.
– Install the fuel delivery unit.
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

1. Fuel Supply 99
Audi A4 2005 ➤
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2 EVAP System
⇒ “2.1 EVAP System, Leak Detection”, page 100
⇒ “2.2 EVAP System, Checking for Leaks”, page 100
⇒ “2.3 EVAP Canister Purge Regulator Valve, Checking”,
page 101
⇒ “2.4 Leak Detection Pump, Checking”, page 104

2.1 EVAP System, Leak Detection

Function
The leak detection system recognizes leaks in the complete fuel
system, including the fuel tank, EVAP canister and the Evapora‐
tive Emission (EVAP) Canister Purge Regulator Valve - N80- .
On the mechanical side, the leak detection system consists main‐
ly of a vacuum-driven diaphragm pump equipped with a reed
contact on the actuation rod of the pump diaphragm. The pump
is supplied with vacuum via
Protected by the engine
copyright. intake
Copying for stroke.
private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
♦ When leak detection is activated,
with respect the ofdiaphragm
to the correctness pump
information in this pumps
document. Copyright by AUDI AG.
the fuel system up to 20 - 30 mbar. The pump diaphragm is
then moved out so that the reed contact at the operating rod
remains in the “open” position.
♦ During the leak diagnosis, the reed contact is monitored to
check if it remains open within 10 seconds. This indicates the
system is sealed.
♦ If the pressure falls (indicating a leak), the diaphragm moves
back and the reed contact closes.
♦ If the reed contact closes within 10 seconds of leak detection
time, a further test is performed: In this case the diaphragm
pump pumps four times again. The Engine Control Module
(ECM) - J623- measures the time for each of the four pumps
until the reed contact is closed again. From that, the control
module can recognize a “small leak” (greater than 1 mm in
diameter) or a “large leak”.
Leak diagnosis is activated automatically shortly following every
engine start. If a malfunction is determined, an entry is made to
the Diagnostic Trouble Code (DTC) memory. The Malfunction In‐
dicator Lamp (MIL) - K83- in the instrument cluster lights up if the
malfunction is recognized for two subsequent starts.

2.2 EVAP System, Checking for Leaks

Special tools and workshop equipment required
♦ Smoke tester .
♦ EVAP and Fuel Supply System Vacuum hose and line routing
diagram.

Note

♦ Secure all hose connections using hose clamps appropriate

for the model type ⇒ Parts catalog .
♦ Replace seals and gaskets when performing repair work.

Leak checking
– Using a Smoke tester , check the Evaporative Emission
(EVAP) canister system for leaks.

100 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
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Note

Always follow the manufacturers directions for the proper instal‐

lation and operation of the Smoke tester being used.

If a leak is found:
– Check the fuel filler cap seal for damage and for proper instal‐
lation. Replace if necessary.
– Check the seals under the locking flanges and the union nuts
are properly tightened onProtected
the fuel tank.
by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

– Check all hose connectionswithofrespect

the fuel supply system and re‐
to the correctness of information in this document. Copyright by AUDI AG.

place or repair any leaking lines.

– Check all hose connections of the EVAP system and replace
or repair any leaking lines.
– Repair or replace any damaged component.
If no leaks are found in the EVAP and Fuel Supply System:
– Erase the DTC memory if a DTC was set. Refer to ⇒ page 7 .
– Perform a road test to verify repair.
If a DTC was set and does not return:
Repair complete, Generate readiness code. Refer to ⇒ page 24 .
– End diagnosis.
If the DTC returns and no leaks are found in the EVAP and Fuel
Supply System:
– Check the DTC memory for any DTC codes pertaining to the
EVAP and Fuel Supply Systems. If a DTC is stored, perform
the diagnostic test procedure for the suspected component.
Refer to ⇒ page 6 .
End diagnosis.

2.3 EVAP Canister Purge Regulator Valve,

Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Evaporative Emission (EVAP) Canister Purge Regulator
Valve - N80- fuse OK.
• The ignition switched off.

Note

Voltage for the Evaporative Emission (EVAP) Canister Purge

Regulator Valve - N80- is supplied via the Engine Component
Power Supply Relay - J757- .

Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .

2. EVAP System 101

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Start diagnosis
– Remove the rear engine cover -arrows-.

– Protected
Disconnect the Copying
by copyright. Evaporative
for private Emission
or commercial (EVAP)
purposes, inCanister Purge
part or in whole, is not
Regulator
permitted unlessValve - N80-
authorised by AUDIelectrical
AG. AUDI AGharness connector
does not guarantee or accept-3-.
any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Checking internal resistance

– Using a Multimeter , check the Evaporative Emission (EVAP)

Canister Purge Regulator Valve - N80- terminals 1 and 2 for
resistance.
Specified value: 22,0 to 30,0 Ω.
Engine Component Power Supply Relay - J757-
– Replace the Evaporative Emission (EVAP) Canister Purge
Regulator Valve - N80- .
If the specification is obtained:
Checking voltage supply

– Using a Multimeter , check the electrical harness connector

terminal 1 to 2 for voltage.
– Operate the starter briefly.
Specified value: battery voltage.
If the specified value was not obtained:

102 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
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– Using a Multimeter , check the electrical harness connector

terminal 1 to Ground (GND) for voltage.
Evaporative Emission (EVAP) Measure to
Canister Purge Regulator Valve -
N80- electrical harness connector
terminal
1 Engine Ground (GND)
– Operate the starter briefly.
Specified value: battery voltage. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
If the specified value is not obtained: with respect to the correctness of information in this document. Copyright by AUDI AG.

– Check the wiring connection from the electrical harness con‐

nector terminal 1 to the Engine Component Power Supply
Relay - J757- terminal 2/87 for an open circuit or short to
Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the wiring connection.
If the specified value was obtained:
Check Ground (GND) activation
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Using a Multimeter , check the Evaporative Emission (EVAP)

Canister Purge Regulator Valve - N80- electrical connector
terminal 2 to Engine Control Module (ECM) - J623- electrical
connector T94 terminal 49 for an open circuit.
Evaporative Emission (EVAP) Engine Control Module
Canister Purge Regulator Valve - (ECM) - J623- electrical
N80- electrical harness connector connector T60 terminal test
terminal box socket
2 49
Specified value: 1.5 Ω max.
If the specification is not obtained:
– Check the wiring for a short circuit to Battery positive (+),
Ground (GND) or an open circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the wiring connection.
If the specification was obtained:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

2. EVAP System 103

Audi A4 2005 ➤
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– Install the rear engine cover -arrows-.

Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. Refer to ⇒ page 6 .
2- If necessary, erase the DTC memory. Refer to ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
Refer to ⇒ page 24 .
– End of diagnosis.

2.4 Leak Detection Pump, Checking

Special tools and workshop equipment required
♦ Multimeter .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
♦ Wiring diagram. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Test requirements
• The Leak Detection Pump (LDP) - V144- fuse OK.
• The ignition switched off.
Procedure
– Remove the left rear wheel housing liner.
– Disconnect the Leak Detection Pump (LDP) - V144- electrical
harness connector -2-.
Checking internal resistance

– Using a Multimeter , check the Leak Detection Pump (LDP) -

V144- for resistance as follows:
Leak Detection Pump (LDP) - V144- Specified values
electrical harness connector termi‐
nals
-1- + -3- 640 to 720 Ω
-2- + -3- 15 to 17 Ω
If any of the specifications are not obtained:
– Replace the Leak Detection Pump (LDP) - -V144-- .
If the specified values are obtained:
Checking voltage supply

Note

The voltage for the Leak Detection Pump (LDP) - -V144-- is sup‐
plied by the Engine Component Power Supply Relay - J757- .

104 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
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– Using a Multimeter , check the Leak Detection Pump (LDP) -

-V144-- electrical harness connector terminal 3 to Ground
(GND) for voltage.
Leak Detection Pump (LDP) - -V144-- Measure to
electrical harness connector terminal
-3- Engine Ground (GND)
– Operate the starter briefly.
Specified value: battery voltage.
– Switch the ignition off.
If the specified value was not obtained:

– Using a Multimeter , check the Leak Detection Pump (LDP) -

-V144-- electrical harness connector terminal 3 to the Engine
Component Power Supply Relay - J757- terminal 2/87 for re‐
sistance.
Specified value: 1.5 Ohms
If the specified value was not obtained:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Check thewith
wiring for a short circuit to Ground (GND) or an open
respect to the correctness of information in this document. Copyright by AUDI AG.

circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply
was OK:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a Multimeter , check the Leak Detection Pump (LDP) -
-V144-- electrical connector terminal 1 to Engine Control Mod‐
ule (ECM) - J623- electrical connector T94 terminal 20 for an
open circuit.

2. EVAP System 105

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Leak Detection Pump (LDP) -

-V144-- electrical connector terminal 2 to Engine Control Mod‐
ule (ECM) - J623- electrical connector T94 terminal 24 for an
open circuit.
Leak Detection Pump (LDP) - - Engine Control Module
V144-- electrical harness connec‐ (ECM) - J623- electrical
tor terminals connector T94 terminals or
test box sockets
-1- 20
-2- 24
Specified value: 1.5 Ω max.
If the specification was not obtained:
– Check the wiring for a short circuit to Battery positive (+), or
an open circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Install the rear engine cover -arrows-.

106 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

3 Electronic Power Control

⇒ “3.1 Throttle Position Sensor/Accelerator Pedal Position Sen‐
sor 2, Checking”, page 107

3.1 Throttle Position Sensor/Accelerator

Pedal Position Sensor 2, Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram
Test requirement
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.

Note

♦ Use only gold-plated terminals when servicing the electrical

harness connector terminals in Throttle Position (TP) Sensor
- G79- / Accelerator Pedal Position Sensor 2 - G185- .
♦ The Throttle Position (TP) Sensor - G79- / Accelerator Pedal
Position Sensor 2 - G185- is located in the accelerator pedal
module and communicate the drivers intensions to the Engine
Control Module (ECM) - J623- completely independently of
each other. Both sensors are located in the accelerator pedal
module and replaced as an entire assembly.

Test sequence
– Remove the left knee panel. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Disconnect the Throttle Position (TP) Sensor - G79- / Accel‐
with respect to the correctness of information in this document. Copyright by AUDI AG.
erator Pedal Position Sensor 2 - G185- electrical harness
connector -2-.
Checking voltage supply
– Switch the ignition on.

3. Electronic Power Control 107

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the following wiring connections for

voltage.
Throttle Position (TP) Sensor - G79- / Ac‐ Specified value
celerator Pedal Position Sensor 2 - G185-
electrical harness connector terminals
1 to Ground (GND) about 5 V
1 to 5 about 5 V
2 to Ground (GND) about 5 V
2 to 3 about 5 V
– Switch the ignition off.
If the specification was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

108 Rep. Gr.20 - Fuel Supply

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Throttle Position (TP) Sensor -

G79- / Accelerator Pedal Position Sensor 2 - G185- electrical
harness connector terminals to the Engine Control Module
(ECM) - J623- electrical connector T94 for an open circuit.
Throttle Position (TP) Sensor - Engine Control Module
G79- / Accelerator Pedal Posi‐ (ECM) - J623- electrical con‐
tion Sensor 2 - G185- electrical nector T94 terminals or test
harness connector terminals box sockets
1 58
2 80
3 56
4 57
5 78
6 79
Specified value: 1.5 Ω max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply
was OK:
– Replace the Throttle Position (TP) Sensor - G79- / Accelerator
Pedal Position Sensor 2 - G185- .
If no malfunction is detected in the wiring and if the voltage supply
was not OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Install the left knee panel.
Final procedures
After repair work, the following work steps must be performed in
the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End diagnosis and switch the ignition off.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

3. Electronic Power Control 109

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

24 – Multiport Fuel Injection

1 Fuel Injection System, Servicing
⇒ “1.1 Safety Precautions”, page 110
⇒ “1.2 Clean Working Conditions”, page 111
⇒ “1.3 Technical Data”, page 111
For all fuel injection system component locations.
For all Fuel supply system removal/installation procedures and
torque specifications.
Check the Technical Bulletins for information that may supersede
any information included in this manual.

Note

♦ All manufacturers special tools as well as common tools may

contain a manufacturer specific part number. These tools may
be substituted with an equivalent aftermarket tool or are avail‐
able for purchase through Audi. Refer to the ⇒ Tool catalog .
♦ Manufacturers special tools as well as common tools that con‐
tain a manufacturer specific part number may be referenced
in the test procedure illustrations showing the tool use or in‐
stallation. If the manufacturer specific tool is not being used,
an equivalent aftermarket tool may be installed in the same
manner as the manufacturers special tool.
♦ The manufacturers test box Test Box 105 Pin - VAG1598/42-
is available for purchase or rental. Refer to the ⇒ Tool catalog .

1.1 Safety Precautions

To reduce the risk of personal injury and/or damage to the fuel
injection and ignition system. Note the following:

WARNING Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
The fuel system is under high pressure! Before opening high
pressure components of the fuel injection system, pressure
must be relieved to residual pressure. Wrap a clean rag around
the connection and relieve residual pressure by carefully loos‐
ening the connection.

♦ Always switch off ignition before disconnecting or connecting

lines of the fuel injection and ignition system, including test
leads.
♦ During some of the tests, a Diagnostic Trouble Code (DTC)
may be recognized and stored by the control module. At the
end of all tests and repairs, the DTC memory should be
checked and, if necessary, erased. After erasing the DTC
memory, a readiness code must be generated.
♦ Always switch the ignition off before cleaning engine.

110 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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Caution

♦ The battery must only be disconnected and connected

with the ignition switched off, since the Engine Control
Module (ECM) - J623- can otherwise be damaged.
♦ Observe procedures for disconnecting the battery.

Observe the following if test and measuring instruments are re‐

quired during a test drive:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Caution
with respect to the correctness of information in this document. Copyright by AUDI AG.

♦ Test and measuring equipment must always be secured

to the rear seat and be operated from there by a second
person.
♦ If test and measuring instruments are operated from the
front passenger's seat and the vehicle is involved in an
accident, there is a possibility that the person sitting in this
seat may receive serious injuries when the airbag is de‐
ployed.

1.2 Clean Working Conditions

Even minor contaminations can lead to malfunctions in the fuel
injection system. When working on the fuel supply/injection sys‐
tem, pay careful attention to the following rules for cleanliness:
♦ Thoroughly clean all unions and adjacent areas with engine or
brake cleaner and dry before disconnecting.
♦ Plug open lines and connections immediately with appropriate
protective caps.
♦ Place removed parts on a clean surface and cover. Use lint-
free cloths.
♦ Install clean components: Remove replacement parts imme‐
diately prior to installation. Do not use parts that have been
stored unpackaged (e.g. in tool boxes etc.).
♦ When the system is open: Do not work with compressed air.
Do not move vehicle unless absolutely necessary.
♦ Separated electrical connectors: Protect from dirt and mois‐
ture. Make sure connections are dry when reconnecting.

1.3 Technical Data

Engine code BKH (3.2 l / 4V / 188 kW engine)
Engine idle speed (Not adjustable) 650 to 750 RPM
Fuel pressure after high-pressure pump approx. 35 bar positive pressure
Fuel pressure before high-pressure pump approx. 6 bar positive pressure

1. Fuel Injection System, Servicing 111

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2 Components, Checking
⇒ “2.1 Oxygen Sensor Heaters before Catalytic Converter,
Checking”, page 112
⇒ “2.2 Oxygen Sensor Heater after Catalytic Converter, Check‐
ing”, page 115
⇒ “2.3 Throttle Valve Control Module, Checking”, page 118
⇒ “2.4 Engine Speed Sensor, Checking”, page 122
⇒ “2.5 Intake Air Temperature Sensor, Checking”, page 124
⇒ “2.6 Engine Coolant Temperature Sensor, Checking”,
page 127
⇒ “2.7 Fuel and Residual Pressures before High Pressure Pump,
Checking”, page 131
⇒ “2.8 Fuel Pressure Sensor, Checking”, page 133
⇒ “2.9 Low Fuel Pressure Sensor, Checking”, page 136
⇒ “2.10 Fuel Metering Valve, Checking”, page 139
⇒ “2.11 Intake Manifold Tuning Valve Position Sensor, Checking”,
page 142
⇒ “2.12 Intake Manifold Runner Position Sensor 2, Checking”,
page 145
⇒ “2.13 Intake Manifold Runner Control Valve,
Protected Checking”,
by copyright. Copying for private or commercial purposes, in part or in whole, is not
page 148 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
⇒ “2.14 Intake Manifold Runner Position Sensor, Checking”, page
151
⇒ “2.15 Fuel Injectors, Checking”, page 153
⇒ “2.16 Intake System, Checking for Leaks”, page 157

2.1 Oxygen Sensor Heaters before Catalyt‐

ic Converter, Checking
This procedure is used to check Oxygen Sensor (O2S) Heater -
Z19- or Oxygen Sensor (O2S) Heater - Z28- .

Note

When servicing terminals in harness connector of Heated Oxygen

Sensors (HO2S) , use only gold-plated terminals.

Special tools and workshop equipment required

112 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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• A/C switched off.

• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Disconnect the Oxygen Sensor (O2S) Heater - Z19- electrical
harness connector -1-.
To disconnect the Oxygen Sensor (O2S) Heater - -Z28-- , perform
the following steps:

– Remove the screw -arrow- retaining the coolant reservoir.

– Disconnect the Engine Coolant Level (ECL) Warning Switch -
F66- electrical connector from the bottom of the coolant res‐
ervoir and set aside the coolant reservoir with the coolant
hoses -1- and -2- connected.

– Disconnect the Oxygen Sensor (O2S) Heater - -Z28-- electri‐

cal harness connector -2-.
Checking internal resistance

2. Components, Checking 113

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Heated Oxygen Sensor (HO2S)

terminals 3 to 5 for resistance.
Specified value: 2.5 to 10.0 Ω (at approx. 20° C)
If the specification was not obtained:
– Replace the faulty Heated Oxygen Sensor (HO2S) before the
catalytic converter. Refer to Fuel Injection and Ignition Repair
Manual.
If the specification was obtained:
Checking voltage supply
Switch the ignition on.
– Using a multimeter , check the Heated Oxygen Sensor (HO2S)
electrical harness connector terminal 5 to the Engine Compo‐
nent Power Supply Relay - J757- terminal 2/87 for voltage.
Heated Oxygen Sensor Engine Component Power Sup‐
(HO2S) electrical harness ply Relay - J757- electrical har‐
connector terminal ness connector terminal
5 2
Switch the ignition off.
Specified value: Battery voltage.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Ground
(GND), or an open circiut.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If the specification was obtained:
Checking Ground (GND) activation
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

114 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Oxygen Sensor (O2S) Heater

electrical harness connector terminal to the Engine Control
Module (ECM) - J623- electrical harness connector T94 for an
open circuit.
Oxygen Sensor (O2S) Heater Engine Control Module (ECM) -
- Z19- electrical harness con‐ J623- electrical connector T94
nector terminal terminal or test box socket
3 51

Oxygen Sensor (O2S) Heater Engine Control Module (ECM) -

- Z28- electrical harness con‐ J623- electrical connector T94
nector terminal terminal or test box socket
3 73
Specified value: 1.5 Ω max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply
was OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in reverse order of removal, note the fol‐
lowing:
Final procedures
After repair work, the following work steps must be performed in
the mentioned sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

2.2 Oxygen Sensor Heater after Catalytic

Converter, Checking Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
This procedure is used to check Oxygen Sensor (O2S) Heater -
with respect to the correctness of information in this document. Copyright by AUDI AG.

Z29- or Oxygen Sensor (O2S) Heater - Z30- .

Note

When servicing terminals in harness connector of Oxygen Sensor

(O2S) 1 (behind Three Way Catalytic Converter (TWC) Heater ,
use only gold-plated terminals.

Special tools and workshop equipment required

♦ Multimeter .
♦ Wiring diagram.

2. Components, Checking 115

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Test requirements
• The Oxygen Sensor (O2S) Behind Three Way Catalytic Con‐
verter (TWC) - G130- fuse OK.
• The Oxygen Sensor (O2S) 2 Behind Three Way Catalytic
Converter (TWC) - G131- fuse OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Disconnect the Oxygen Sensor (O2S) Heater - Z29- electrical
harness connector -2-.
To disconnect the Oxygen Sensor (O2S) Heater - Z30- , perform
the following steps:

– Remove the screw -arrow- retaining the coolant reservoir.

116 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the Oxygen Sensor (O2S) Heater - Z30- electrical

harness connector -1-.
Checking internal resistance

– Using a multimeter , check the Oxygen Sensor (O2S) Heater

terminals 1 to 2 for resistance.
Specified value: 1.0 to 20.0 Ω (at approx. 20° C)
If the specification was not obtained:
– Replace the faulty Heated Oxygen Sensor (HO2S) behind the
Three Way Catalytic Converter (TWC). Refer to Fuel Injection
and Ignition Repair Manual.
If the specification was obtained:
Checking voltage supplyProtected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Switch the ignition on. with respect to the correctness of information in this document. Copyright by AUDI AG.

– Using a multimeter , check the Oxygen Sensor (O2S) Behind

Three Way Catalytic Converter (TWC) electrical harness con‐
nector terminal 1 to Engine Component Power Supply Relay
- J757- terminal 2/87 for voltage.
Oxygen Sensor (O2S) Behind Engine Component Power Sup‐
Three Way Catalytic Convert‐ ply Relay - J757- electrical har‐
er (TWC) - G130- electrical ness connector terminal
harness connector terminal
1 2
– Switch the ignition off.
Specified value: Battery voltage.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Ground
(GND), or an open circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If the specification was obtained:
Checking Ground (GND) activation
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

2. Components, Checking 117

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Oxygen Sensor (O2S) Behind

Three Way Catalytic Converter (TWC) electrical harness con‐
nector terminal 2 to the Engine Control Module (ECM) - J623-
electrical harness connector T94 for an open circuit.
Oxygen Sensor (O2S) Behind Engine Control Module (ECM) -
Three Way Catalytic Convert‐ J623- electrical connector T94
er (TWC) - G130- electrical terminal or test box socket
harness connector terminal
2 75

Heated Oxygen Sensor Engine Control Module (ECM) -

(HO2S) - -G131-- electrical J623- electrical connector T94
harness connector terminal terminal or test box socket
2 91
Specified value: 1.5 Ω max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply
was OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in reverse order of removal, note the fol‐
lowing:
Final procedures
After repair work, the following work steps must be performed in
the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

2.3 Throttle Valve Control Module, Check‐

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
ing permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

Note

Use only gold-plated terminals when servicing terminals in har‐

ness connector of Throttle Valve Control Module - J338- .

Special tools and workshop equipment required

♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.

118 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Throttle valve must not be damaged or dirty.
• Coolant Temperature at least 80° C.
Function
Throttle valve operation occurs by an electric motor ( Throttle
Drive (for Electronic Power Control (EPC)) - G186- ) in the Throttle
Valve Control Module - J338- . It is operated by the Engine Control
Module (ECM) - J623- and the Throttle Position (TP) Sensor -
G79- / Accelerator Pedal Position Sensor 2 - G185- .
The Throttle Valve Control Module - J338- is made up of the fol‐
lowing components:
♦ Throttle Drive (for Electronic Power Control (EPC)) - G186-
♦ Throttle Drive Angle Sensor 1 (for Electronic Power Control
(EPC)) - G187-
♦ Throttle Drive Angle Sensor 2 (for Electronic Power Control
(EPC)) - G188-
The Throttle Valve Control Module -Protected
J338- by cannot
copyright.be serviced
Copying for private or commercial purposes, in part or in whole, is not
separately and must be serviced as permitted
a unit. unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Function test
– Connect the scan tool.
– Switch ignition on.
– Using the scan tool, check the throttle valve position (absolute)
at idle stop:
Diagnostic text Specified value
Throttle valve position (absolute)
Idle stop 3.0 to 25.0%
– Slowly depress the accelerator pedal to Wide Open Throttle
(WOT) stop while observing the percentage display. The per‐
centage display must increase uniformly.
– Using the scan tool, check the throttle valve position (absolute)
at Wide Open Throttle (WOT) stop:
Diagnostic text Specified value
Throttle valve position (absolute)
Wide Open Throttle (WOT) stop 84.0 to 97.0%
– End diagnosis and switch ignition off.
If the specified values are not obtained:

2. Components, Checking 119

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Remove the rear engine cover -arrows-.

– Disconnect the Throttle Valve Control Module - J338- electri‐

cal harness connector -1-.
Checking resistance

– Using a multimeter , check the Throttle Drive (for Electronic

Power Control (EPC) - G186- at the Throttle Valve Control
Module - J338- terminals 3 to 5 for resistance.
Specified value: 1.0 to 5.0 Ω (at 20° C)
If the specification was not obtained:
– Replace the Throttle Valve Control Module - J338- . Refer to .
If the specification was obtained:
– Check the voltage supply of the Throttle Valve Control Module
- J338- to the Engine Control Module (ECM) - J623- .
– ⇒ page 107 .
Checking voltage supply and wiring
– Switch the ignition on.

120 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Using a Multimeter , check the Throttle Drive (for Electronic

Power Control (EPC)) - G186- at the Throttle Valve Control
Module - J338- electrical harness connector terminals 2 to 6
for voltage.
Specified value: at least 4.5 V
– Switch the ignition off.
If the specification was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Using a Multimeter , check the Throttle Drive (for Electronic

Power Control (EPC)) - G186- at Throttle Valve Control Mod‐
ule - J338- electrical harness connector terminals to the En‐
gine Control Module (ECM) - J623- electrical harness
connector T60 terminals for an open circuit.
Throttle Valve Control Engine Control Module (ECM) -
Module - J338- electrical J623- electrical connector T60 ter‐
harness connector termi‐ minals or test box socket
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
nalsunless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
permitted
with respect to the correctness of information in this document. Copyright by AUDI AG.
1 13
2 14
3 15
4 28
5 30
6 12
Specified value: 1.5 Ω max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply
was OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

2. Components, Checking 121

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Install the rear engine cover -arrows-.

Final procedures
After repair work, the following work steps must be performed in
the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

2.4 Engine Speed Sensor, CheckingProtected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

Note

Use only gold-plated terminals when servicing terminals in the

electrical harness connector of the Engine Speed (RPM) Sensor
- G28- .

Special tools and workshop equipment required

♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Function
The Engine Speed (RPM) Sensor - G28- detects RPM and ref‐
erence marks. Without an engine speed signal, the engine will not
start. If the engine speed signal fails while the engine is running,
the engine will stop immediately.
Function test
– Connect the scan tool.
– Switch the ignition on.
– Using the scan tool, check the engine speed:
Diagnostic text Specified value
Engine rotations per minute (RPM) Idle speed
– End diagnosis and switch ignition off.
If the specified value was not obtained:

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Audi A4 2005 ➤
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Procedure
– Disconnect the Engine Speed (RPM) Sensor - G28- electrical
harness connector -arrow-.
Checking internal resistance

– Using a multimeter , check the Engine Speed (RPM) Sensor -

G28- terminals 1 to 2 -B- for resistance.
Specified value: 0.7 to 1000 kOhm
If the specified value was not obtained:
– Replace the Engine Speed (RPM) Sensor - G28- .
If the specified value is obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

2. Components, Checking 123

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Engine Speed (RPM) Sensor -

G28- electrical harness connector terminals to the Engine
Control Module (ECM) - J623- electrical harness connector
T60 terminals for an open circuit.
Engine Speed (RPM) Sensor - Engine Control Module
G28- electrical harness connector (ECM) - J623- electrical
terminals connector T60 terminals or
test box socket
1 53
2 38
Specified value: Wire resistance max 1.5 Ω.
If the specification is not obtained:
– Check the wiring for a short circuit to Battery positive (+) or an
open circuit.
– If necessary, repair the wiring connection.
If no malfunctions are detected:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in reverse order of removal, note the fol‐
lowing:
Final procedures
After repair work, the following work steps must be performed in
the mentioned sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End diagnosis and switch the ignition off.

2.5 Intake Air Temperature Sensor, Check‐

ing
The Intake Air Temperature (IAT) Sensor - G42- and the Manifold
Absolute Pressure (MAP) Sensor - G71- are integrated into one
unit and cannot be serviced separately.
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram
Test requirements
• Fuses for engine electronics OK.
• Battery voltage at least 12.5 V.
• The ignition switched off.
Checking function
– Connect the scan tool.
– Switch the ignition on. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– Using the scan tool, check the intake air temperature:
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

124 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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Diagnostic text Specified value

Intake Air Temperature approx. ambient air temperature
(IAT)
If the specified value is not obtained:
– End diagnosis and switch the ignition off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the rear engine cover -arrows-.
Checking voltage supply

– Disconnect the Intake Air Temperature (IAT) Sensor - G42-

electrical harness connector-4-.
Switch the ignition on

2. Components, Checking 125

Audi A4 2005 ➤
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– Using a Multimeter , check the Intake Air Temperature (IAT)

Sensor - G42- electrical harness connector for voltage.
Intake Air Temperature (IAT) Sensor - Specified value
G42- electrical harness connector
1 to B+ Battery voltage (+)
2 to Ground (GND) Battery voltage (+)
3 to Ground (GND) about 5 V
4 to Ground (GND) Battery voltage (+)
Switch the ignition off
If the specified values are obtained:
– Replace the Intake Air Temperature (IAT) Sensor - G42- .
If specified values are not obtained:
Checking wiring connections
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Using a Multimeter , check the Intake Air Temperature (IAT)

Sensor - G42- electrical harness connector terminals to the
Engine Control Module (ECM) - J623- electrical harness con‐
nector terminals for an open circuit.
Intake Air Temperature (IAT) Sensor Engine Control Module
- G42- electrical harness connector (ECM) - J623- electrical
terminals harness connector termi‐
nals or test box sockets
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
1 40permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2 39
3 29
4 44
Specified value: 1.5 Ω max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply
was OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

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– Install the rear engine cover -arrows-.

2.6 Engine Coolant Temperature Sensor,

Checking

WARNING

♦ Cooling system is under pressure.

♦ Danger of scalding when opening!

Note

Use only gold-plated terminals when servicing terminals in the

electrical harness connector of Engine Coolant Temperature
(ECT) Sensor - G62- .

Special tools and workshop equipment required

♦ Multimeter .
♦ jumper wire .
♦ Wiring diagram.
Test requirements
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
• Engine cold.
Function test
– Connect the scan tool.
– Switch the ignition on.
– Using the scan tool, check the coolant temperature:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Diagnostic text Specified value
Coolant temperature Approx. coolant temperature

2. Components, Checking 127

Audi A4 2005 ➤
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If the specified value is not obtained:

– Continue test according to the following table:
Indicated Cause Test
approx. - Open circuit or short cir‐ ⇒ page 129
40.0° C cuit to (B+)
approx. Short circuit to Ground ⇒ page 129
140.0° C (GND)
If the specified value was obtained:
– Start the engine and let it run at idle.
The temperature value must increase uniformly in increments of
1.0° C.
If the engine shows problems in certain temperature ranges and
if the temperature does not climb uniformly, the temperature sig‐
nal is intermittent.
– Replace the the Engine Coolant Temperature (ECT) Sensor -
G62- .
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 . Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Start diagnosis with respect to the correctness of information in this document. Copyright by AUDI AG.

– Remove the front engine cover -arrows-.

Checking internal resistance

– Disconnect the Engine Coolant Temperature (ECT) Sensor -

G62- electrical harness connector -arrow-.

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– Using a multimeter , check the Engine Coolant Temperature

(ECT) Sensor - G62- terminals 1 to 2 for resistance.
Use the chart below for the specified values:
♦ Area A: Resistance values 0 to 50° C.
♦ Area B: Resistance values 50 to 100° C.

Specified values:
♦ Range A, 30° C equals a resistance of 1.5 to 3.2 kΩ
♦ Range B, 80° C equals a resistance of 275 to 375Ω
If any of the specified values was not obtained:
– Replace the Engine Coolant Temperature (ECT) Sensor -
G62- ADD LINK.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Testing if unless
permitted display is approx.
authorised - 40.0°
by AUDI AG. Cdoes not guarantee or accept any liability
AUDI AG
with respect to the correctness of information in this document. Copyright by AUDI AG.

– Disconnect the Engine Coolant Temperature (ECT) Sensor -

G62- electrical harness connector -arrow-.
– Using a jumper wire , connect the Engine Coolant Tempera‐
ture (ECT) Sensor - G62- electrical harness connector termi‐
nals 1 to 2.

– Check the value indicated on the scan tool display.

If the value jumps to approx. 140.0° C
– End diagnosis and switch the ignition off.
– Replace the Engine Coolant Temperature (ECT) Sensor -
G62- ADD LINK.
If indication remains at approx. -40.0° C:
Testing if display approx. 140.0° C

2. Components, Checking 129

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the Engine Coolant Temperature (ECT) Sensor -

G62- electrical harness connector -arrow-.
If indication jumps to approx. -40.0° C:
– End diagnosis and switch ignition off.
– Replace the Engine Coolant Temperature (ECT) Sensor -
G62- ADD LINK.
If indication remains at approx. 140.0° C:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Using a Multimeter , check theProtected

Engine CoolantCopying
by copyright. Temperature
for private or commercial purposes, in part or in whole, is not
(ECT) Sensor - G62- electrical permitted
harness connector
unless terminals
authorised by AUDI AG. AUDI to AG does not guarantee or accept any liability
the Engine Control Module (ECM) - J623- electrical harness
with respect to the correctness of information in this document. Copyright by AUDI AG.

connector T60 terminals for an open circuit.

Engine Coolant Tempera‐ Engine Control Module (ECM) -
ture (ECT) Sensor - G62- J623- electrical connector T60 ter‐
electrical harness connec‐ minals or test box socket
tor terminals
1 40
2 43
Specified value: 1.5 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Install the front engine cover -arrows-.

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2.7 Fuel and Residual Pressures before

High Pressure Pump, Checking
Special tools and workshop equipment required
♦ Hand held remote control (jumper) .
♦ Electrical connector test lead set .
♦ Fuel pressure test set (high pressure) .
♦ Measuring container, fuel-resistant .
Test requirements
• The Fuel Pump (FP) Control Module - J538- OK.
• The fuel filter OK.
• The parking brake engaged.
• Battery voltage at least 12.5 V.
• The selector lever of automatic transmission in position “P” or
“N”.
• All electrical consumers switched off (radiator fan must NOT
run during test).
• A/C switched off.
• The fuel tank at least 1/4 filled.
• The ignition switched off.
Checking system pressure
– Remove the rear seat bench.
– Remove the cover for the right locking flange -arrows-.

– Disconnect the electrical harness connector -arrow- from the

fuel delivery unit.
– Connect a Hand held remote control (jumper) to terminal -1-
of the fuel delivery unit and to vehicle battery (+).

2. Components, Checking 131

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Connect a jumper cable from a Electrical connector test lead

set to terminal -5- of the fuel delivery unit and to vehicle Ground
(GND).

– Remove the rear engine cover -arrows-.

WARNING

The fuel system is under high pressure! Before opening high

pressure components of the fuel injection system, pressure
must be relieved to residual pressure . Then wrap a clean rag
around the connection and relieve residual pressure by care‐
fully loosening the connection.

– Disconnect the fuel line -arrow-.

– Connect the Fuel pressure test set (high pressure) to the fuel
line.

– Connect the assisting hose -arrow- to the pressure gauge and

hold in the measuring container.
– Open the pressure gauge shut-off valve. The lever points in
direction of flow.
– Press the switch on the Hand held remote control (jumper)
briefly to bleed the fuel system

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– Close the pressure gauge shut-off valve. The lever is perpen‐

dicular to the direction of flow -arrow-.
– Press the switch on the Hand held remote control (jumper)
until no more pressure increase is observed on the fuel pres‐
sure gauge.
• Specification: approx. 6 bar positive pressure
If the specification was not obtained:
– Check the delivery rate of the fuel pump. Refer to
⇒ page 94 .
Checking residual pressure
– Check for leaks and residual pressure by observing the pres‐
sure loss on the pressure gauge.
• After 10 minutes there must be a residual pressure of at least
3.75 bar.
The holding pressure drops below 3.75 bar:
♦ Check the connection between the fuel pressure gauge and
the fuel line for leaks.
♦ Check the pressure gauge for leaks.
♦ Check the fuel lines and their connections for leaks.
♦ Replace the fuel filter with integrated fuel pressure regulator.
♦ Replace the fuel pump.
Assembly is performed in the reverse order of removal. Note the
following:

Note

Before disconnecting the pressure gauge, release the fuel pres‐

sure by opening the shut-off valve. Hold a container under the
connection. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Torque specifications
Component Nm
Fuel line to fuel rail 22

2.8 Fuel Pressure Sensor, Checking

Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Fuel Pump (FP) Control Module - J538- OK.
• The Engine Control Module (ECM) - J623- fuses OK.
• The fuel filter OK.
• The battery voltage at least 12.5 V.
• All electrical consumers switched off (radiator fan must NOT
run during test).
• A/C switched off.
• The fuel tank at least 1/4 filled.

2. Components, Checking 133

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

• The ignition switched off.

Procedure
– Remove the rear engine cover -arrows-.
Checking voltage

134 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Disconnect the Fuel Pressure Sensor - G247- .

– Switch the ignition on.
– Using a Multimeter, Check the electrical harness connector
terminals 1 to 3 for voltage.
Specified value: near 5.0 V
– Switch the ignition off.
Continue test according to the following table:
Value Cause Test
If the specified Open or shorted cir‐ ⇒ page 135
value was not ob‐ cuit
tained:
If the specified Check reference sig‐ ⇒ page 135
value was ob‐ nal circuit
tained:
Checking wiring
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– Remove the Motronic Engine Control Module (ECM) - J623 - .
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

Refer to appropriate service manual.

with respect to the correctness of information in this document. Copyright by AUDI AG.

– Using a Multimeter, Check the Fuel Pressure Sensor - G247-

electrical harness connector to the Motronic Engine Control
Module (ECM) electrical harness connector T60 for an open
circuit.
Fuel Pressure Sensor - Motronic Engine Control Module
G247- electrical harness (ECM) electrical harness connec‐
connector terminals tor T60 terminals
1 40
3 29
Specified value: 1.5 Ω Max.
If the specified value was Not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery positive or Ground
– Check the wiring connection for damage, corrosion, loose or
broken terminals.
– If necessary, repair the faulty wiring connection.
– Go to Final procedures
If the specified value was obtained:
– If no faults were found Replace the Motronic Engine Control
Module (ECM) - J623 - . Refer to appropriate service manual.
– Go to Final procedures
Checking wiring
– Remove the Motronic Engine Control Module (ECM) - J623 - .
Refer to appropriate service manual.
– Using a Multimeter, Check the Fuel Pressure Sensor - G247-
electrical harness connector to the Motronic Engine Control
Module (ECM) - J623 - electrical harness connector T60 for
an open circuit.
Fuel Pressure Sensor - Motronic Engine Control Module
G247- electrical harness (ECM) electrical harness connector
connector terminals T60 terminals
2 59

2. Components, Checking 135

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery positive or Ground
– Check the wiring connection for damage, corrosion, loose or
broken terminals.
– If necessary, repair the faulty wiring connection.
– Go to Final procedures
If the specified value was obtained: Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Replace the Fuel Pressure Sensor - G247- . Refer to appro‐
with respect to the correctness of information in this document. Copyright by AUDI AG.
priate service manual.
Final procedures
– Reinstall the engine cover and air filter housing, if necessary.
Refer to the appropriate service manual.
– After the repair work, the following work steps must be per‐
formed in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .

2.9 Low Fuel Pressure Sensor, Checking

136 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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Start diagnosis
– Remove the front engine cover -arrows-.
Checking voltage

– Disconnect the Low Fuel Pressure Sensor - G410- electrical

harness connector -1-.
– Switch the ignition on.

2. Components, Checking 137

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Low Fuel Pressure Sensor -

G410- electrical harness connector for voltage.
Low Fuel Pressure Sensor - Specified value
G410- electrical harness connec‐
tor terminals
1 to Battery positive (+) Battery voltage (+)
2 to Ground (GND) Battery voltage (+)
3 to Ground (GND) about 5 V
– Switch the ignition off.
If the specified values are obtained:
– Replace the Low Fuel Pressure Sensor - G410- , note the fol‐
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
lowing: permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

Note

The 3.2L 6-Cyl. 4V (BKH) engine is equipped with two different

Low Fuel Pressure Sensors - G410- designs. One design is inte‐
grated into the high pressure fuel pump and must be replaced as
a complete assembly. The second design is not integrated into
the high pressure fuel pump and may be replaced separately.

If the specified values are not obtained:

138 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Using a Multimeter , check the Low Fuel Pressure Sensor -

G410- electrical harness connector terminals to the Engine
Control Module (ECM) - J623- electrical harness connector
T60 terminals for an open circuit according to the wiring dia‐
gram.
Low Fuel Pressure Sensor - Engine Control Module
G410- electrical harness connec‐ (ECM) - J623- electrical con‐
tor terminals nector T60 terminals or test
box socket
1 40
2 49
3 29
Specified value: 1.5 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– If necessary,
permitted unless authorisedrepair
by AUDI the faulty
AG. AUDI AG wiring connection.
does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Install the front engine cover -arrows-.

2.10 Fuel Metering Valve, Checking

Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Fuel Pump (FP) Control Module - J538- OK.
• The Engine Component Power Supply Relay - J757- OK.
• The fuel filter OK.
• The parking brake engaged.
• The battery voltage at least 12.5 V.
• The selector lever of automatic transmission in position “P” or
“N”.
• All electrical consumers switched off (radiator fan must NOT
run during test).

2. Components, Checking 139

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

• A/C switched off.

• The fuel tank at least 1/4 filled.
• The ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the front engine cover -arrows-.

– Remove three screws -arrows- and the engine lifting eye to

gain access to the Fuel Metering Valve - N290- electrical har‐
ness connector.

140 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Disconnect the Fuel Metering Valve - N290- electrical harness

connector -2-.
Checking internal resistance
– Using a Multimeter , check the Fuel Metering Valve - N290-
terminals for resistance
Specified value: 1.5 to 11 Ω (at approx. 20° C)
If the specified value was not obtained:
– Replace the Fuel Metering Valve - N290- .
If the specified value was obtained:
Checking voltage
Switch the ignition on.
– Using a Multimeter , check the Fuel Metering Valve - N290-
electrical harness connector terminal 1 to Ground (GND) for
voltage.
– Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained:
– Check the wiring from the Fuel Metering Valve - N290- elec‐
trical harness connector terminal 1 to the Engine Component
Power Supply Relay - J757- terminal 2/87 for a short circuit to
Ground (GND), or an open circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the wiring connection.
If no malfunctions are found in the wiring:
Checking wiring connections
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

2. Components, Checking 141

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Fuel Metering Valve - N290-

electrical harness connector terminal 2 to the Engine Control
Module (ECM) - J623- electrical harness connector T60 ter‐
minal 45 for an open circuit.
Fuel Metering Valve - N290- Engine Control Module (ECM) -
electrical harness connector J623- electrical connector T60
terminal terminal or test box socket
2 45
Specified value: 1.5 Ω Max.
If the specification was not obtained:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

– Check the wiring for a short circuit to each other, Battery (+),
with respect to the correctness of information in this document. Copyright by AUDI AG.

and Ground (GND).

– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Install the front engine cover -arrows-.

2.11 Intake Manifold Tuning Valve Position

Sensor, Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Engine Control Module (ECM) - J623- fuses OK.
• The parking brake engaged.
• The battery voltage at least 12.5 V.
• The selector lever of automatic transmission in position “P” or
“N”.
• All electrical consumers switched off (radiator fan must NOT
run during test).
• A/C switched off.
• The fuel tank at least 1/4 filled.
• The ignition switched off.

142 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the front engine cover -arrows-.
Checking voltage supply

– Disconnect the Intake Manifold Tuning (IMT) Valve Position

Sensor - G513- electrical harness connector -3-.
Switch the ignition on.

2. Components, Checking 143

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Intake Manifold Tuning (IMT)

Valve Position Sensor - G513- electrical harness connector for
voltage.
Intake Manifold Tuning (IMT) Specified value
Valve Position Sensor - G513-
electrical harness connector
1 to Ground (GND) Battery positive (+)
2 to Ground (GND) about 5 V
3 to Battery positive (+) Battery positive (+)
Switch the ignition off.
If the specified values are obtained:
– Replace the Intake Manifold Tuning (IMT) Valve Position Sen‐
sor - G513- . Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
If specified values are not obtained: with respect to the correctness of information in this document. Copyright by AUDI AG.

Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a multimeter , check the Intake Manifold Tuning (IMT)
Valve Position Sensor - G513- electrical harness connector
terminals to the Engine Control Module (ECM) - J623- electri‐
cal harness connector T94 terminals for an open circuit.
Intake Manifold Tuning (IMT) Valve Engine Control Module
Position Sensor - G513- electrical (ECM) - J623- electrical
harness connector harness connector T94
terminals or test box
socket
1 63
2 52
3 9
Specified value: 1.5 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

144 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Install the front engine cover -arrows-.

Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

2.12 Intake Manifold Runner Position Sensor

with respect to the correctness of information in this document. Copyright by AUDI AG.

2, Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Engine Control Module (ECM) - J623- fuses OK.
• The parking brake engaged.
• The battery voltage at least 12.5 V.
• The selector lever of automatic transmission in position “P” or
“N”.
• All electrical consumers switched off (radiator fan must NOT
run during test).
• A/C switched off.
• The fuel tank at least 1/4 filled.
• The ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the rear engine cover -arrows-.
Checking voltage supply

Note

The Intake manifolds have been removed for clarity.

2. Components, Checking 145

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the Intake Manifold Runner Position Sensor 2 -

G512- electrical harness connector -1-.
Switch the ignition on.

146 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Intake Manifold Runner Posi‐

tion Sensor 2 - G512- electrical harness connector for voltage.
Intake Manifold Runner Position Specified value
Sensor 2 - G512- electrical har‐
ness connector
1 to Ground (GND) about 5 V
2 to Battery positive (+) Battery voltage (+)
3 to Ground (GND) Battery voltage (+)
Switch the ignition off.
If the specified values are obtained:
– Replace the Intake Manifold Runner Position Sensor 2 -
G512- .
If specified values are not obtained:
Checking wiring
If the manufacturers test box is being used.
Protected by Perform the following
copyright. Copying for private or commercial purposes, in part or in whole, is not
step. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a multimeter , check the Intake Manifold Runner Posi‐
tion Sensor 2 - G512- electrical harness connector terminals
to the Engine Control Module (ECM) - J623- electrical harness
connector T60 terminals for an open circuit.
Intake Manifold Runner Position Engine Control Module
Sensor 2 - G512- electrical harness (ECM) - J623- electrical
connector harness connector T60
terminals or test box
socket
1 29
2 50
3 40
Specified value: 1.5 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

2. Components, Checking 147

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Install the rear engine cover -arrows-.

2.13 Intake Manifold Runner Control Valve,

Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Intake Manifold Runner Control (IMRC) Valve - N316-
fuse OK.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
• The Engine Component
permitted unlessPower
authorisedSupply Relay
by AUDI AG. AUDI -AG
J757-
does notOK.
guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
• The parking brake engaged.
• The battery voltage at least 12.5 V.
• The selector lever of automatic transmission in position “P” or
“N”.
• All electrical consumers switched off (radiator fan must NOT
run during test).
• A/C switched off.
• The fuel tank at least 1/4 filled.
• The ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the rear engine cover -arrows-.

148 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the Intake Manifold Runner Control (IMRC) Valve

- N316- electrical harness connector -5-.
Checking internal resistance

– Using a Multimeter , check the Intake Manifold Runner Control

(IMRC) Valve - N316- terminals 1 to 2 for resistance
Intake Manifold Runner Control (IMRC) Valve - N316- terminals
1 to 2
Specified value: around 30 Ω.
If the specified value was not obtained:
– Replace the Intake Manifold Runner Control (IMRC) Valve -
N316- .
If the specified value was obtained:
Checking voltage
Switch the ignition on.

2. Components, Checking 149

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Intake Manifold Runner Control

(IMRC) Valve - N316- electrical harness connector terminal 1
to ground (GND) for voltage.
Specified value: battery voltage.
– Switch the ignition off.
If the specified value was not obtained:
– Check the wiring from the Intake Manifold Runner Control
(IMRC) Valve - N316- electrical harness connector terminal 1
to the Engine Component Power Supply Relay - J757- termi‐
nal 2/87 for a short circuit to Ground (GND), or an open circuit.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the wiring connection.
If no malfunctions are found in the wiring: Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Checking wiring with respect to the correctness of information in this document. Copyright by AUDI AG.

If the manufacturers test box is being used. Perform the following

step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a multimeter , check the Intake Manifold Runner Control
(IMRC) Valve - N316- electrical harness connector terminal 2
to the Engine Control Module (ECM) - J623- electrical harness
connector T60 terminal 35 for an open circuit.
Intake Manifold Runner Control Engine Control Module
(IMRC) Valve - N316- electrical har‐ (ECM) - J623- electrical
ness connector terminal harness connector T60
terminal or test box
socket
2 35
Specified value: 1.5 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

150 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Install the rear engine cover -arrows-.

2.14 Intake Manifold Runner Position Sen‐

sor, Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Intake Manifold Runner Position Sensor - G336- fuse OK.
• The Engine Component Power Supply Relay - J757- OK.
• The parking brake engaged.
• The battery voltage at least 12.5 V.
• The selector lever of automatic transmission in position “P” or
“N”.
• All electrical consumers switched off (radiator fan must NOT
run during test).
• A/C switched off.
• The fuel tank at least 1/4 filled.
• The ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the rear engine cover -arrows-.

Note
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
The Intake manifolds have
permitted unless been
authorised by removed forAGclarity.
AUDI AG. AUDI does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

2. Components, Checking 151

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the Intake Manifold Runner Position Sensor -

G336- electrical harness connector -1-.
Checking voltage supply
Switch the ignition on.

– Using a Multimeter , check the Intake Manifold Runner Posi‐

tion Sensor - G336- electrical harness connector for voltage.
Harness connector Terminal Specified value Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
1 to Ground (GND) about 5 V with respect to the correctness of information in this document. Copyright by AUDI AG.
2 to Battery positive (+) Battery voltage (+)
3 to Ground (GND) Battery voltage (+)
Switch the ignition off.
If the specified values are obtained:
– Replace the Intake Manifold Runner Position Sensor - G336- .
If the specified values are not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

152 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Intake Manifold Runner Posi‐

tion Sensor - G336- electrical harness connector terminals to
the Engine Control Module (ECM) - J623- electrical harness
connector T60 terminals for an open circuit.
Intake Manifold Runner Position Engine Control Module
Sensor - G336- electrical harness (ECM) - J623- electrical
connector terminals harness connector T60
terminals or test box
Socket
1 29
2 55
3 40
Specified value: 1.5 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
The Intake Manifold Runner Position Sensor - G336- must be
adapted to the Engine Control Module (ECM) - J623- .
To adapt the Intake Manifold Runner Position Sensor - G336- to
the Engine Control Module (ECM) - J623- perform the following
steps:
Test requirements
• The battery voltage at least 12.5 V.
• Coolant temperature must be between 20° C and 80° C.
• No DTC's stored in DTC memory.
– Start the engine and let run at idle for at least 70 seconds.
– The Engine Control Module (ECM) - J623- will automatically
adept the Intake Manifold Runner Position Sensor - G336- .

– Install the rear engine cover -arrows-.

Final procedures
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
After the repair permitted
work, the following work steps must be performed
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

in the following sequence:

with respect to the correctness of information in this document. Copyright by AUDI AG.

1- Check the DTC memory. ⇒ page 6 .

2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

2.15 Fuel Injectors, Checking

The following procedure is used to diagnose -N30, N31, N32,
N33, N83, N84-
Special tools and workshop equipment required

2. Components, Checking 153

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

♦ Multimeter .
♦ Diode test lamp (12V) .
♦ Wiring diagram.
Test requirements
• The Fuel Injectors - N30, N31, N32, N33,N83,N84- fuses OK.
• The Engine Speed (RPM) Sensor - G28- OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the rear engine cover -arrows-.
Right bank

– Disconnect the 6 pin electrical harness connector -1- for Fuel

Injectors - N30, N31, N32- from the right rear of the engine.
Left bank

154 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the 14 pin electrical harness connector -3- for Fuel

Injectors - N33, N83, N84- from the left rear of the engine.
Checking internal resistance
– Using a Multimeter , check the Fuel Injectors for resistance.
Right bank
Fuel Injector 6 pin electrical harness connector ter‐
minal
N30 Cyl. 1 1 to 2
N31 Cyl. 2 3 to 4
N32 Cyl. 3 5 to 6
Left bank
Fuel Injector 14 pin electrical harness connector
terminal
N33 Cyl. 4 5 to 6
N83 Cyl. 5 7 to 8
N84 Cyl. 6 9 to 10
Specified value: 12 to 13 Ω (at room temperature).

Note

With an engine at operating temperature, the resistance of the

fuel injectors increases by approx. 4 to 6 Ω.

If any of the specified values are not obtained:

– Replace the malfunctioning Fuel Injector .
If the specified values are obtained:
Checking activation
– Connect a diode test lamp (12V) to the electrical harness con‐
nector terminals of the Fuel Injector to be tested.
Right bank
Fuel Injector 6 pin electrical harness connector ter‐
minal
N30 Cyl. 1 1 to 2
N31 Cyl. 2 3 to 4
N32 Cyl. 3 5 to 6
Left bank
Fuel Injector 14 pin electrical harness connector
terminal
N33 Cyl.
Protected 4 Copying for private or commercial
by copyright. 5 to 6
purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
N83 Cyl.to5the correctness of information in this 7document.
with respect to 8 Copyright by AUDI AG.
N84 Cyl. 6 9 to 10
– Operate the starter briefly.

2. Components, Checking 155

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

Voltage testers do not go out completely during low current pick-

up between activations by the ECM, but rather continue to glow
a little and then get slightly brighter during activation.

The LED must light up.

– Switch the ignition off.
If the LED does not light up:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– UsingProtected
a Multimeter , check
by copyright. theprivate
Copying for Fuel Injector electrical
or commercial harness
purposes, in part or in whole, is not
connector terminals
permitted to the
unless authorised Engine
by AUDI Control
AG. AUDI AG doesModule (ECM)
not guarantee or accept- any liability
J623- electrical harness connector T60 terminals for an open
with respect to the correctness of information in this document. Copyright by AUDI AG.

circuit.
Right bank
Fuel injector 6 pin electrical Engine Control Module
harness connec‐ (ECM) - J623- electrical har‐
tor terminals ness connector T60 terminals
or test box socket
N30 Cyl. 1 1 33
2 1
N31 Cyl. 2 3 46
4 16
N32 Cyl. 3 5 32
6 3
Left bank
Fuel injector 14 pin electrical Engine Control Module
harness connec‐ (ECM) - J623- electrical har‐
tor terminals ness connector T60 terminals
or test box socket
N33 Cyl. 4 5 31
6 18
N83 Cyl. 5 7 47
8 17
N84 Cyl. 6 9 48
10 2
Specified value: 1.5 Ω Max.
If any of the specified values are not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).

156 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Check the electrical harness connector for damage, corrosion,

lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

– Install the rear engine cover -arrows-.

2.16 Intake System, Checking for Leaks

Special tools and workshop equipment required
♦ Engine Leak Detection Spray .

Note

♦ Vacuum in the intake system sucks in the leak detection spray

with false air. Leak detection spray decreases ignition quality
of the fuel mixture. This causes a reduction in engine speed
and a sharp increase of CO content.
♦ It is absolutely necessary to follow the safety precautions listed
on the can.

Test requirements
• Coolant temperature at least 80° C.
• The parking brake engaged.
• The selector lever of automatic transmission in position “P” or
“N”.
• The ignition switched off.
Test sequence
– Connect the scan tool.
– Start the engine and let run at idle.
– Select “Mode 1: Checking measured values”.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– Select the following measured values:
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

PID Diagnostic text Specified value

06: Short time gasoline-air ratio bank 1 -7.00 to 7.00%
08: Short time gasoline-air ratio bank 2 -7.00 to 7.00%
12: Engine rotations per minute (RPM) 640 to 720 RPM
– Spray the intake system parts with engine leak detection spray
in a systematic manner.

2. Components, Checking 157

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

If the engine speed drops or if the short-term gasoline-air ratio

changes:
– End diagnosis and switch the ignition off.
– Check the sprayed part of intake system for leaks, and repair
the malfunction.
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
3- If the DTC memory was erased, generate
permitted readiness
unless authorised code.
by AUDI AG. AUDI AG does not guarantee or accept any liability
⇒ page 24 . with respect to the correctness of information in this document. Copyright by AUDI AG.

– End of diagnosis.

158 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

3 Functions, Checking
⇒ “3.1 Heated Oxygen Sensors before Catalytic Converter,
Checking”, page 159
⇒ “3.2 Oxygen Sensors after Catalytic Converter, Checking”,
page 162

3.1 Heated Oxygen Sensors before Cata‐

lytic Converter, Checking
This procedure is used to diagnose Heated Oxygen Sensor
(HO2S) - G39- or Heated Oxygen Sensor (HO2S) 2 - G108- .

Note

Use only gold-plated terminals when servicing terminals in the

electrical harness connector of the Heated Oxygen Sensor
(HO2S) .

Special tools and workshop equipment required

♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Heated Oxygen Sensor (HO2S) - G39- fuse OK.
• The Heated Oxygen Sensor (HO2S) 2 - G108- fuse OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Exhaust system between catalytic converter and cylinder head
properly sealed.
• Coolant Temperature at least 80° C.
Function test
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Perform a function test of the Heated Oxygen Sensors (HO2S) .
Refer to ADD LINK
If specified values are obtained:
– End diagnosis and switch the ignition off.
If the specified values are not obtained:
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .

3. Functions, Checking 159

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Start diagnosis
– Disconnect the Heated Oxygen Sensor (HO2S) - G39- elec‐
trical harness connector -1-.
To disconnect the Heated Oxygen Sensor (HO2S) 2 - G108- ,
perform the following steps:

– Remove the screw -arrow- retaining the coolant reservoir.

– Disconnect the Oxygen Sensor (O2S) Heater - -Z28-- electri‐

cal harness connector -2-.
Checking primary voltage

160 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a multimeter , check the Heated Oxygen Sensor (HO2S)

electrical harness connector terminals 1 to 2 for voltage.
Specified value: 0.400 to 0.500 Volts
– Switch the ignition off.
If the specified value was obtained:
– Replace the faulty Heated Oxygen Sensor (HO2S) . Refer to
Fuel Injection and Ignition Repair Manual.
If the specified value was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

3. Functions, Checking 161

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Heated Oxygen Sensor (HO2S)

electrical harness connector terminals to the Engine Control
Module (ECM) - J623- electrical harness connector T94 ter‐
minals for an open circuit.
Heated Oxygen Sensor Engine Control Module (ECM) - J623-
(HO2S) - G39- electri‐ electrical connector T94 terminals or
cal harness connector test box sockets
terminals
1 83
2 61
4 82
6 84

Heated Oxygen Sensor Engine Control Module (ECM) - J623-

(HO2S) - -G108-- elec‐ electrical connector T94 terminals or
trical harness connec‐ test box sockets
tor terminals
1 81
2 59
4 60
6 62
Specified value: 1.5 Ω Max.
If any of the specified values are not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– permitted
If necessary, repairby the
unless authorised AUDIfaulty wiring
AG. AUDI AG doesconnection.
not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

3.2 Oxygen Sensors after Catalytic Con‐

verter, Checking
This procedure is used to diagnose Oxygen Sensor (O2S) Behind
Three Way Catalytic Converter (TWC) - G130- or Oxygen Sensor
(O2S) 2 Behind Three Way Catalytic Converter (TWC) - G131- .

Note

When servicing the electrical harness connector of the Oxygen

Sensors (O2S) Behind Three Way Catalytic Converter (TWC) ,
use only gold-plated terminals.

162 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Special tools and workshop equipment required

♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Oxygen Sensor (O2S) Behind Three Way Catalytic Con‐
verter (TWC) - G130- fuse OK.
• The Oxygen Sensor (O2S) 2 Behind Three Way Catalytic
Converter (TWC) - G131- fuse OK. Refer to ⇒ page 115 .
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, selector lever in position
“P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Exhaust system between catalytic converter and cylinder head
properly sealed. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
• Coolant Temperature at least 80°
withC.
respect to the correctness of information in this document. Copyright by AUDI AG.

Function test
Perform a function test of the Heated Oxygen Sensors (HO2S) .
Refer to ADD LINK
If specified values are obtained:
– End diagnosis and switch the ignition off.
If the specified values are not obtained:
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Disconnect the Oxygen Sensor (O2S) Behind Three Way Cat‐
alytic Converter (TWC) - G130- electrical harness connector
-2-.
To disconnect the Oxygen Sensor (O2S) 2 Behind Three Way
Catalytic Converter (TWC) - G131- , perform the following steps:

3. Functions, Checking 163

Audi A4 2005 ➤
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– Remove the screw -arrow- retaining the coolant reservoir.

– Disconnect the Oxygen Sensor (O2S) 2 Behind Three Way

Catalytic Converter (TWC) - G131- electrical harness connec‐
tor -2-.
Checking primary voltage

– Using a Multimeter , check the Oxygen Sensor (O2S) 2 Behind

Three Way Catalytic Converter (TWC) electrical harness con‐
nector terminals 3 to 4 for voltage.
– Switch the ignition on.
Specified value: 0.400 to 0.500 V.
– Switch the ignition off.
If the specified value was obtained:
– Replace the faulty Oxygen Sensor (O2S) Behind Three Way
Catalytic Converter (TWC) . Refer to Fuel Injection and Ignition
Repair Manual.
If the specified value was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

164 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Using a Multimeter , check the Oxygen Sensor (O2S) Behind

Three Way Catalytic Converter (TWC) electrical harness con‐
nector terminals to the Engine Control Module (ECM) - J623-
electrical harness connector T94 terminals for an open circuit.
Oxygen Sensor (O2S) Be‐ Engine Control Module (ECM) -
hind Three Way Catalytic J623- electrical harness connector
Converter (TWC) - G130- T94 terminals or test box sockets
electrical harness connector
terminals
3 76
4 77

Oxygen Sensor (O2S) 2 Be‐ Engine Control Module (ECM) -

hind Three Way Catalytic J623- electrical harness connector
Converter (TWC) - G131- T94 terminals or test box sockets
electrical harness connector
terminals
3 54
4 55
Specified value: 1.5 Ω Max.
If any of the specified values are not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
and Ground (GND).
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

3. Functions, Checking 165

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

4 Engine Control Module

⇒ “4.1 ECM Voltage Supply, Checking”, page 166
⇒ “4.2 ECM, Removing and Installing”, page 168
The Engine Control Module (ECM) - J623- regulates fuel injection,
Throttle Valve Control Module - J338- , oxygen sensor regulation,
ignition, knock control, Evaporative Emission (EVAP) Canister
Purge Regulator Valve - N80- , engine speed limitation through
On Board Diagnostic (OBD).

4.1 ECM Voltage Supply, Checking

Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, selector lever in position
“P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test sequence
– Remove the Engine Control Module (ECM) Power Supply Re‐
lay - J271- .
Checking voltage
– Using a Multimeter , check the Engine Control Module (ECM)
Power Supply Relay - J271- socket 1/30 to Ground (GND).
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Specified value: battery voltage.
with respect to the correctness of information in this document. Copyright by AUDI AG.

If the specified value was not obtained:

– Check the wiring connections from the Battery to the Engine
Control Module (ECM) Power Supply Relay - J271- socket
1/30 for an open circuit or a short circuit.
– Check the wiring connections for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If the specified value was obtained:
– Switch the ignition on.
– Using a Multimeter , check the Engine Control Module (ECM)
Power Supply Relay - J271- socket 3/86 to Ground (GND).
Specified value: battery voltage.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.

166 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a Multimeter , check the Engine Control Module (ECM)
Power Supply Relay - J271- socket 3/86 to the Engine Control
Module (ECM) - J623- electrical harness connector T94 ter‐
minal 92 for resistance.
Engine Control Module Engine Control Module (ECM) -
(ECM) Power Supply Relay - J623- electrical connector T94
J271- socket terminal terminal or test box socket
3/86 92
Specified value: 3.2 Ω Max.
If the specification was not obtained:
– Check the wiring for a short circuit to each other, Battery (+),
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
and Ground (GND). permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Check the electrical harness connector for damage, corrosion,
lose or broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
Checking activation
– Switch the ignition on.
– Using a Multimeter , check the Engine Control Module (ECM)
Power Supply Relay - J271- socket 4/85 to the Engine Control
Module (ECM) - J623- electrical harness connector T94 ter‐
minal 69 for voltage.
Engine Control Module Engine Control Module (ECM) -
(ECM) Power Supply Relay - J623- electrical connector T94
J271- socket terminal terminal or test box socket
4/85 69
– Switch the ignition off.
Specified value: 0.5 V Max.
If the specified value was obtained:
– Replace the Engine Control Module (ECM) Power Supply Re‐
lay - J271- .
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was not
OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

4. Engine Control Module 167

Audi A4 2005 ➤
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4.2 ECM, Removing and Installing

Special tools and workshop equipment required
♦ Heat gun .

Note

When the Engine Control Module (ECM) - J623- electrical har‐

ness connectors are disconnected, the adaptation values are
erased and the DTC memory content remains intact.

Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Start diagnosis with respect to the correctness of information in this document. Copyright by AUDI AG.

Check the identification of the previous Engine Control Module

(ECM) - J623- as follows:
– Connect the scan tool.
– Switch the ignition on.
– Using the scan tool, select “Mode 09: Vehicle information”.
– Select “ Calibration Identification”.
The Engine Control Module (ECM) - J623- identification number
will be displayed, e.g.: 06A906032NA 4983
– Record the Engine Control Module (ECM) - J623- identifica‐
tion number.
– End diagnosis and switch the ignition off.
Removing
– Remove the rubber seal -arrow- from the plenum chamber
cover-1-.
– Remove the plenum chamber cover -1-.

168 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
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– Using a screwdriver, remove the wiper arms caps -3-.

– Loosen the wiper arm nuts -4- several turns.
– Loosen the wiper arms-2- by gently rocking.
– Remove the wiper arm nuts and wiper arms -2-.
– Disconnect the retaining clips -1- and remove the cowl panel
grille -5-.

– Remove the screws -arrows- and electronics box cover from

the electronics box.

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Using a screwdriver, carefully pry off mounting bracket
with respect to the correctness of information in this document. Copyright by AUDI AG.

-arrow- and remove the Engine Control Module (ECM) - J623-

from the electronics box.

Note

The Engine Control Module (ECM) - J623- remains connected at

the wiring harnesses.

Caution

To prevent damage (burning) to wire and harness connections,

insulation and control modules, perform the following work
steps exactly! Observe operating instructions for heat gun.

Note

The threads in the protective housing, into which the shear bolts
are threaded, are then heated with the heat gun. During this step,
the holding effect that the locking compound has on the shear bolt
threads is reduced, thereby allowing the shear bolts to be re‐
moved easier.

4. Engine Control Module 169

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Heat gun set at its lowest setting, heat the shear bolt
for approx. 20 to 25 seconds.
– Remove the shear bolt with locking pliers. Discard the used
shear bolts.

Repeat the previous steps for the second shear bolt.

– Remove the electrical harness connector retaining brackets

-2- and -5- and the electrical harness connectors from the En‐
gine Control Module (ECM) - J623- .
– Remove the Engine Control Module (ECM) - J623- .
Installing
Installation is performed in reverse order of the removal. Note the
following:

Note

♦ New shear bolts must be used when reinstalling the electrical

harness connector retaining brackets to the Engine Control
Module (ECM) - J623- .
♦ After installing a new Engine Control Module (ECM) - J623- it
must be adapted. ADD LINK

Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
2- If necessary, erase the DTC memory.
permitted ⇒ pageby7AUDI
unless authorised . AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

170 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

5 Additional Signals, Checking

⇒ “5.1 Speed Signal, Checking”, page 171
⇒ “5.2 Brake Light and Brake Pedal Switches, Checking”,
page 172
⇒ “5.3 Can-Bus Terminal Resistance, Checking”, page 174

5.1 Speed Signal, Checking

The following procedure requires a test drive. Observe all safety
precautions.
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Test requirements permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
• The Speedometer - G21- OK.
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Function test
– Connect the scan tool.
– Perform a road test with a vehicle speed greater than 5 Km/h.
– Using the scan tool, Check the vehicle speed:
Diagnostic text Specified value
Vehicle Speed Approx. Vehicle Speed
– Compare the vehicle speed on the scan tool to the Speedom‐
eter - G21- .
Specified value: a difference of no greater than 10%.
If the specified value was not obtained or no speed was displayed:
– Check the wiring from the Engine Control Module (ECM) -
J623- to the Instrument Cluster Control Module - J285- for an
open circuit, Short to Battery (+), or to Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .

5. Additional Signals, Checking 171

Audi A4 2005 ➤
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– End of diagnosis.

5.2 Brake Light and Brake Pedal Switches,

Checking
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirements
• The Brake Light Switch - F- fuse OK.
• The Brake Pedal Switch - F47- fuse OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the drivers side storage compartment.
Checking internal resistance
– Disconnect the Brake Light Switch - F- / Brake Pedal Switch -
F47- electrical harness connector.
– Using a Multimeter , check the Brake Pedal Switch - F47- ter‐
minals 1 to 4 for a internal short.
Specified value: ∞ (infinity).
If the specified value was not obtained:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Replace the Brake Light Switchwith
- F- / Brake
respect Pedal Switch
to the correctness - in this document. Copyright by AUDI AG.
of information
F47- .
If the specified value was obtained:

172 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Brake Pedal Switch - F47- ter‐

minals 1 to 4 for resistance.
– Press the brake pedal switch plunger in.
Specified value: approx. 0 Ω
If the specified value was obtained:
– Check the voltage supply of the Brake Light Switch - F- / Brake
Pedal Switch - F47- ⇒ page 173 .
If the specified value was not obtained:
– Replace the Brake Light Switch - F- / Brake Pedal Switch -
F47- .
Checking voltage supply
– Switch the ignition on.

– Using a Multimeter , check the Brake Pedal Switch - F47-

electrical harness connector terminal 1 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
– Using a Multimeter , check the Brake Pedal Switch - F47-
electrical harness connector terminal 3 to Ground (GND).
Specified value: battery voltage.
– Switch the ignition off.
If the specified value was not obtained:
– Check the wiring ⇒ page 173 .
If the specified value was obtained:
– Replace the Brake Light Switch - F- / Brake Pedal Switch -
F47- .
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

5. Additional Signals, Checking 173

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Brake Light Switch - F- / Brake

Pedal Switch - F47- electrical harness connector to the Engine
Control Module (ECM) - J623- electrical harness connector
T94 for open an circuit.
Brake Light Switch - F- / Engine Control Module (ECM) -
Brake Pedal Switch - F47- J623- electrical connector T94 ter‐
electrical harness connec‐ minals or test box sockets
tor terminals
2 43
4 16
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was not
OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Install the drivers side storage compartment. Refer to Fuel In‐
jection and Ignition Repair Manual.
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

5.3 Can-Bus Terminal Resistance, Check‐

ing
The Engine Control Module (ECM) - J623- communicates with all
databus capable control modules via a CAN databus.
These databus capable control modules are connected via two
data bus wires which are twisted together (CAN_High and
CAN_Low), and exchange information (messages). Missing in‐
formation on the databus iscopyright.
Protected by recognizedCopying as a malfunction
for private and in part or in whole, is not
or commercial purposes,
stored. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Trouble-free operation of the CAN-bus requires that it have a ter‐
minal resistance. The central terminal resistor is located in the
Engine Control Module (ECM) - J623- .
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirement
• A CAN-Bus malfunction was recognized.
• The Engine Control Module (ECM) - J623- fuses OK.

174 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

• Battery voltage at least 12.5 V.

• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Disconnect the Instrument Cluster Control Module - J285-
electrical harness connector.

Note

The Engine Control Module (ECM) - J623- must remain connec‐

ted for the following step.

– Using a Multimeter , check the Instrument Cluster Control

Module - J285- electrical harness connector terminals 12 to
13 for resistance.
Specified value: 60 to 72 Ω (at approx. 20° C)
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND). Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Check the wiring connection for damage,with
corrosion,
respect to thelose or of information in this document. Copyright by AUDI AG.
correctness
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a Multimeter , check the Instrument Cluster Control
Module - J285- electrical harness connector to the Engine
Control Module (ECM) - J623- electrical harness connector
T94 for resistance.
Instrument Cluster Control Engine Control Module (ECM) -
Module - J285- electrical J623- electrical connector T94 ter‐
harness connector termi‐ minals or test box sockets
nals
12 (Can_Bus Low) 67
13 (Can_Bus High) 68
Specified value: 1.5 Ω Max.
If the specified value was not obtained:

5. Additional Signals, Checking 175

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Check the wiring connection for an open circuit, short circuit

to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
– Replace the Instrument Cluster Control Module - J285- .
Final procedures
After the repair work, the following work steps must be performed
in the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

176 Rep. Gr.24 - Multiport Fuel Injection

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

26 – Exhaust System, Emission Controls

1 Exhaust System Components, Re‐
moving and Installing
For all Exhaust System, Emission control component locations.
Refer to Engine Mechanical Repair Manual
For all Exhaust System, Emission control removal/installation
procedures and torque specifications. Refer to Engine Mechani‐
cal Repair Manual
Check the Technical Bulletins for information that may supersede
any information included in this manual.

Note

♦ All manufacturers special tools as well as common tools may

Three Way Catalytic Converter (TWC), checking

Test requirements
• Battery voltage at least 12.5 volts.
• Oxygen Sensors OK.
• No leaks or damage to exhaust system.
Function test
– Perform the function test in Diagnostic Mode 06. Refer to
⇒ page 8 . Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

– End diagnosis and switch the ignition off. with respect to the correctness of information in this document. Copyright by AUDI AG.

If the specified values are exceeded:

– Check the exhaust system for leaks.
– If necessary, repair the leak in the exhaust system.
– Erase the DTC memory. Refer to ⇒ page 6 .
– Perform a road test to verify Repair.
If the DTC does not return:
Repair complete, Generate readiness code. Refer to ⇒ page 24 .
– End diagnosis.
If no leaks are found in the exhaust system:
– Replace the catalytic converter including front exhaust pipe.
Refer to Engine Mechanical, Repair. Group. 26.
Final procedures
After the Repair work, the following work steps must be performed
in the following sequence:

1. Exhaust System Components, Removing and Installing 177

Audi A4 2005 ➤
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1- Check the DTC memory. Refer to ⇒ page 6 .

2- If necessary, erase the DTC memory. Refer to ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
Refer to ⇒ page 24 .
End of Diagnosis

178 Rep. Gr.26 - Exhaust System, Emission Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

28 – Ignition/Glow Plug System

1 Ignition System, Servicing
⇒ “1.1 Safety Precautions”, page 179
⇒ “1.2 General Information”, page 179
⇒ “1.3 Spark Plug Test Data”, page 180
⇒ “1.4 Camshaft Position Sensors, Checking”, page 180
⇒ “1.5 Camshaft Adjustment Valve, Checking”, page 183
⇒ “1.6 Knock Sensors, Checking”, page 186
⇒Protected
“1.7 Ignition Coils
by copyright. with
Copying for Power Output Stage,
private or commercial purposes, Checking”,
in part or in whole, is not
page 189unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
permitted
with respect to the correctness of information in this document. Copyright by AUDI AG.
1.1 Safety Precautions
To reduce the risk of personal injury and/or damage to the fuel
injection and ignition system, always observe the following:

WARNING

Observe the following for all installations, especially in the en‐

gine compartment due to lack of room:
♦ Route lines of all types (e.g. for fuel, hydraulic, EVAP can‐
ister system, coolant and refrigerant, brake fluid, vacuum)
and electrical wiring so that the original path is followed.
♦ Watch for sufficient clearance to all moving or hot com‐
ponents.
♦ Fuel system is under pressure! Before opening system,
place rags around the connection point. Then release
pressure by carefully loosening connection.
♦ Test equipment must always be secured to the rear seat
and operated by a second person.
♦ Test and measuring equipment that is operated from the
passenger seat, the person seated could be injured in the
event of an accident involving deployment of the passen‐
ger-side airbag.
♦ Do not touch or disconnect ignition wires when engine is
running or turning at starting RPM.
♦ Only disconnect and reconnect wires for injection and ig‐
nition system, including test leads, if the ignition is turned
off.
♦ The use of nails, paper clips, or another unauthorized ma‐
terials to back-probe electrical harness connectors is
strictly prohibited and may cause damage to the electrical
harness connectors, terminal ends or damage to a com‐
ponent. Use only the manufacturers test lead kit or an
equivalent aftermarket test lead kit for back-probing all
electrical harness connectors.

1.2 General Information

For all Ignition/Glow plug system component locations. Refer to
Fuel Injection and Ignition Repair Manual

1. Ignition System, Servicing 179

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

For all Ignition/Glow plug system removal/installation procedures

and torque specifications. Refer to Fuel Injection and Ignition Re‐
pair Manual
Check the Technical Bulletins for information that may supersede
any information included in this manual.

Note

♦ All manufacturers special tools as well as common tools may

1.3 Spark Plug Test Data

Engine code BKH (3.2 l / 4V / 188 kW engine)
Engine Control Module (ECM) Siemens Simos 6
System identification
Engine idle speed 650 to 750 RPM (not adjustable)
Engine speed (RPM) limitation Starting at approx. 6500 RPM
Ignition sequence 1-5-3-6-2-4
Ignition timing Not adjustable, regulated by Electronic control module
Ignition system Single coil ignition system with 6 ignition coils (output stages integrated)
that are connected directly to the spark plugs.

1.4 Camshaft Position Sensors, Checking

This procedure is used to check Camshaft Position (CMP) Sen‐
sors - G40, G300, G163, G301- .

Note

The following procedure is used to diagnose all Camshaft Position

(CMP) Sensors .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
Special toolswith
and workshop
respect equipment
to the correctness required
of information in this document. Copyright by AUDI AG.

180 Rep. Gr.28 - Ignition/Glow Plug System

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

• A/C switched off.

• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
Checking activation
– Remove the front engine cover -arrows-.

– Remove the rear engine cover -arrows-.

– Disconnect the electrical harness connector of the Camshaft
Position (CMP) Sensor - G40- to be tested.
– Switch the ignition on.

– Using a Multimeter , Check the Camshaft Position (CMP) Sen‐

sor electrical harness connector terminals 1 to 3 for voltage.
Specified value: about 5.0 V
– Switch the ignition off.
If the specification was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box isProtected
not being used. Perform the fol‐
by copyright. Copying for private or commercial purposes, in part or in whole, is not
lowing step. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

1. Ignition System, Servicing 181

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , Check the Camshaft Position (CMP) Sen‐

sor electrical harness connector to the Engine Control Module
(ECM) - J623- electrical harness connector T60 for an open
circuit.
Camshaft Position (CMP) Sensor - Engine Control Module
G40- electrical harness connector (ECM) - J623- electrical har‐
terminals ness connector T60 termi‐
nals or test box sockets
1 Battery positive (+) 11
2 (signal) 25
3 Ground (GND) 40

Camshaft Position (CMP) Sensor Engine Control Module

3 - G300- electrical harness con‐ (ECM) - J623- electrical har‐
nector terminals ness connector T60 termi‐
nals or test box sockets
1 Battery positive (+) 11
2 (signal) 54
3 Ground (GND) 40

Camshaft Position (CMP) Sensor Engine Control Module

2 - G163- electrical harness con‐ (ECM) - J623- electrical har‐
nector terminals ness connector T60 termi‐
nals by
Protected orcopyright.
test box sockets
Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
1 Battery positive (+) 11
with respect to the correctness of information in this document. Copyright by AUDI AG.

2 (signal) 9
3 Ground (GND) 40

Camshaft Position (CMP) Sensor Engine Control Module

4 - G301- electrical harness con‐ (ECM) - J623- electrical har‐
nector terminals ness connector T60 termi‐
nals or test box sockets
1 Battery positive (+) 11
2 (signal) 24
3 Ground (GND) 40
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was
OK:
– Replace the Camshaft Position (CMP) Sensor - G40- Refer to
Fuel Injection and Ignition Repair Manual.
If no malfunction is found in the wiring and voltage supply was not
OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in the reverse order of removal, note the
following:

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Audi A4 2005 ➤
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Final procedures
After repair work, the following work steps must be performed in
the mentioned sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End diagnosis and switch ignition off.

1.5 Camshaft Adjustment Valve, Checking

This procedure is used to check the Camshaft Adjustment Valves
- N205, N208, N318, N319- .
Special tools and workshop equipment required
♦ Multimeter - V.A.G 1526 A- or equivalent.
♦ Voltage Tester - VAG1527B- or equivalent.
♦ Test Box 105 Pin - VAG1598/42- .
♦ Adapter Lead Vag1598/39 - VAG1598/39-1- .
Test requirements
• The Camshaft Adjustment Valves fuses OK.
• Ignition switched off.
• the Engine Control Module (ECM) Power Supply Relay - J271-
OK.

Note

Voltage for camshaft adjustment solenoid valves is supplied by

the Engine Control Module (ECM) Power Supply Relay - J271- .

Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Start diagnosis
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Remove the front engine cover -arrows-.

1. Ignition System, Servicing 183

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Remove the rear engine cover -arrows-.

Cylinder bank 1 (right)

– Disconnect the Camshaft Adjustment Valve 1 (exhaust) -

N318- electrical harness connector or -1- the Camshaft Ad‐
justment Valve 1 - N205- -2-.
Cylinder bank 2 (left)

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Remove the screw -arrow- retaining the coolant reservoir.

– Disconnect the Engine Coolant Level (ECL) Warning Switch -

F66- electrical harness connector from the bottom of the cool‐
ant reservoir and set aside the coolant reservoir with the
coolant hoses -1- and -2- connected.
– Disconnect the Camshaft Adjustment Valve 2 - N208- electri‐
cal harness connector -2- or the Camshaft Adjustment Valve
2 (exhaust) - N319- -3-.
Checking internal resistance

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Audi A4 2005 ➤
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– Using a Multimeter , check the Camshaft Adjustment Valve for

resistance.
Specified value: 5.0 to 8.0 Ω (at approx. 20° C)
If the specified value was not obtained:
– Replace the faulty Camshaft Adjustment Valve Refer to Fuel
Injection and Ignition Repair Manual.
If the specified value was obtained:
Checking voltage
– Switch the ignition on.
– Using a Multimeter , Check the Camshaft Adjustment Valve
electrical harness connector terminal 1 to the Engine Control
Module (ECM) Power Supply Relay - J271- terminal 2/87 for
voltage.
– Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained:
– Check the wiring connection for an open circuit or a short cir‐
cuit Ground (GND). Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– Check the wiring connectionpermitted
for damage, corrosion, lose or
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability

broken terminals.
with respect to the correctness of information in this document. Copyright by AUDI AG.

– If necessary, repair the faulty wiring connection.

If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

1. Ignition System, Servicing 185

Audi A4 2005 ➤
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– Using a Multimeter , Check the Camshaft Adjustment Valve

electrical harness connector terminal 2 to the Engine Control
Module (ECM) - J623- electrical harness connector T60 ter‐
minal for an open circuit.
Camshaft Adjustment Valve 1 - Engine Control Module
N205- electrical harness connec‐ (ECM) electrical harness
tor terminal connector T60 terminal or
test box socket
2 51

Camshaft Adjustment Valve 2 - Engine Control Module

N208- electrical harness connec‐ (ECM) electrical harness
tor terminal connector T60 terminal or
test box socket
2 74

Camshaft Adjustment Valve 1 (ex‐ Engine Control Module

haust) - N318- electrical harness (ECM) electrical harness
connector terminal connector T60 terminal or
test box socket
2 27

Camshaft Adjustment Valve 2 (ex‐ Engine Control Module

haust) - N319- electrical harness (ECM) electrical harness
connector terminal connector T60 terminal or
test box socket
2 39
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– If necessary, repair the faulty wiring
permitted connection.
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
If no malfunction is found in the wiring and voltage supply was not
OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in the reverse order of removal.
Final procedures
After repair work, the following work steps must be performed in
the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End of diagnosis.

1.6 Knock Sensors, Checking

The following procedure is used to check Knock Sensor (KS) 1 -
G61- and Knock Sensor (KS) 2 - G66- .
Special tools and workshop equipment required

186 Rep. Gr.28 - Ignition/Glow Plug System

Audi A4 2005 ➤
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♦ Multimeter .
♦ Wiring diagram.

Note

♦ Cylinders 1, 2, and 3 (bank 1) are monitored by Knock sensor

(KS) 1 - -G61-- . Cylinders 4, 5, and 6 (bank 2) are monitored
by Knock sensor (KS) 2 - -G66-- .
♦ Knock sensors themselves cannot be checked electrically.
♦ When servicing terminals in the harness connector of knock
sensors, use only gold-plated terminals.
♦ For the knock sensors to function properly, it is important that
the tightening torque be exactly 20 Nm.
♦ Contact surfaces between Knock Sensor (KS) 1 - G61- and
Knock Sensor (KS) 2 - G66- and cylinder block must be free
of corrosion, dirt and grease.

Test requirements
• The mounting bolt of Knock Sensor (KS) 1 - G61- / Knock
Sensor (KS) 2 - G66- tightened to 20 Nm.
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Remove the rear engine cover -arrows-.
Checking knock sensor and wiring

Note

The knock sensor electrical connectors can be identified by color.

Knock Sensor (KS) 1 - -G61-- (Bank 1) is green. Knock Sensor
(KS) 2 - -G66-- (Bank 2) is gray.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

1. Ignition System, Servicing 187

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the electrical harness connector -1- or -2- of the

respective knock sensor.
1 - Knock Sensor (KS) 1 - -G61-.- .
2 - Knock sensor (KS) 2 - -G66-.- .
Checking internal resistance

– Using a Multimeter , check the Knock Sensor terminals for an

internal short.
Knock Sensor (KS) Electrical harness connector terminals
1+2
1+3
2+3
Specified value: ∞ (Infinity).
If the specified values are not obtained:
– Replace the faulty Knock Sensor (KS) . Refer to Fuel Injection
and Ignition Repair Manual.
If the specified values are obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .

188 Rep. Gr.28 - Ignition/Glow Plug System

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , Check the Knock Sensor electrical har‐

ness connector to the Engine Control Module (ECM) - J623-
electrical harness connector T60 for an open circuit.
Knock Sensor (KS) 1 - G61- Engine Control Module (ECM) elec‐
electrical harness connec‐ trical harness connector T60 termi‐
tor terminals nals or test box sockets
1 41
2 58
3 42

Knock Sensor (KS) 2 - G66- Engine Control Module (ECM) elec‐

electrical harness connec‐ trical harness connector T60 termi‐
tor terminals nals or test box sockets
1 56
2 57
3 42
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken
Protectedterminals.
by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– If necessary, repair
with respect to the the faulty
correctness wiring
of information connection.
in this document. Copyright by AUDI AG.

If no malfunction is found in the wiring and the resistance was not

OK:
– Replace the faulty Knock Sensor (KS) . Refer to Fuel Injection
and Ignition Repair Manual.
If no malfunction is found in the wiring and the resistance was OK:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in the reverse order of removal, note the
following:
Final procedures
After repair work, the following work steps must be performed in
the mentioned sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End diagnosis and switch ignition off.

1.7 Ignition Coils with Power Output Stage,

Checking
The following procedure is used to diagnose all Ignition Coil with
Power Output Stage - N70, N127, N291, N292, N323, N324- .
Special tools and workshop equipment required
♦ Multimeter .
♦ Diode test lamp .
♦ Wiring diagram.

1. Ignition System, Servicing 189

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Test requirements
• The Ignition Coils with Power Output Stage fuses OK.
• The Engine Component Power Supply Relay - J757- OK.
• The Engine Speed (RPM) Sensor - G28- OK.
• The Camshaft Position (CMP) Sensor - G40- OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window de‐
froster, switched off.
• Vehicles with automatic transmission, shift selector lever into
position “P” or “N”.
• A/C switched off.
• Ground (GND) connections between engine/transmission/
chassis OK.
• Ignition switched off. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Test procedure permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
Recognize a nonfunctional or misfiring cylinder as follows:
– Compare the spark plugs of all the cylinders to each other.
Check the electrodes for carbon fouling.
If faulty a cylinder is recognized:
– Switch the spark plug from the faulty cylinder with one from
another cylinder.
If the malfunction follows the spark plug:
– Replace the spark plug.
If the malfunction remains at the original cylinder:
– Switch the ignition coil from the faulty cylinder with one from
another cylinder.
If the malfunction follows the ignition coil:
– Replace the ignition coil.
Removal
– Remove the front engine cover -arrows-.

190 Rep. Gr.28 - Ignition/Glow Plug System

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Remove the rear engine cover -arrows-.

Cylinder bank 1 (right)

– Remove the air duct screws -arrows-.

– Remove the air ducts -1- and -2-.

– Remove the check valve -1- from the air duct hose.
– Loosen the hose clamp -2-, release the retaining clips
-arrows-, and remove the air duct hose.

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
– Disconnect the
permitted unless electrical
authorised harness
by AUDI AG. AUDI connectors fromorthe
AG does not guarantee follow‐
accept any liability
ing: with respect to the correctness of information in this document. Copyright by AUDI AG.
1- Engine Coolant Temperature (ECT) Sensor - G62-
2- Intake Manifold Flap Change-over Valve - N239-
3- Intake Manifold Tuning (IMT) Valve Position Sensor
(P2076) - G513-

1. Ignition System, Servicing 191

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Disconnect the electrical harness connectors from the follow‐

ing:
1- Camshaft Adjustment Valve 1 (exhaust) - N318- .
2- Camshaft Adjustment Valve 1 - N205- .
3- Camshaft Position (CMP) Sensor - G40- .
4- Intake Manifold Runner Position Sensor - G336- .
5- Camshaft Position (CMP) Sensor 3 - G300- .
– Remove the screws -arrows- and disconnect the electrical
connections at the ignition coils.
Cylinder bank 2 (left)

– Remove the screw -arrow- retaining the coolant reservoir.

– Disconnect the electrical connector from the Engine Coolant
Level (ECL) Warning Switch - F66- at the bottom of the coolant
reservoir and set aside the coolant reservoir with the coolant
hoses -1- and -2- connected.

– Disconnect the electrical connector from the high pressure fuel

pump -2-.

– Disconnect the electrical harness connectors from the follow‐

ing:
1- Camshaft Position (CMP) Sensor 2 - G163- .
2- Camshaft Adjustment Valve 2 - N208- .
3- Camshaft Adjustment Valve 2 (exhaust) - N319- .
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
4- Camshaft Positionpermitted
(CMP) Sensor 4 - G301- .
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

– Remove the screws -arrows- and disconnect the electrical

connections at the ignition coils.
Checking voltage supply
– Switch the ignition on.

192 Rep. Gr.28 - Ignition/Glow Plug System

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , check the Ignition Coil electrical harness

connector terminals 1 to 4 for voltage.
Specified value: battery voltage.
– Switch the ignition off.
If the specified value was not obtained:
– Check the Ignition Coil electrical harness connector terminal
1 to the Engine Component Power Supply Relay - J757- sock‐
et 4/85 for an open circuit.
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If the specified values were obtained:
Checking activation

WARNING

Do not touch the Ignition Coils connecting parts or adapter ca‐

bles during the following test.

– Disable the power supply to the Fuel Injectors - N30, N31, N32,
N33- by removing the necessary fuse.

– Using a diode test lamp , check the Ignition Coil electrical har‐
ness connector terminals 2 to 3 for voltage.
– Operate the starter.
The LED should flicker.
– Switch the ignition off.
If the LED flickers and the voltage was OK:
– Replace the faulty Ignition Coils with Power Output Stage -
N70, N127, N291, N292- Refer to Fuel Injection and Ignition
Repair Manual. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
If the LED does not flicker: with respect to the correctness of information in this document. Copyright by AUDI AG.

1. Ignition System, Servicing 193

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Using a Multimeter , Check the Ignition Coil electrical harness

connector to the Engine Control Module (ECM) - J623- elec‐
trical harness connector T60 for an open circuit.
Ignition Coils with Power Engine Control Module (ECM) elec‐
Output Stage electrical trical harness connector T60 termi‐
harness connector termi‐ nal or test box socket
nal
-N70- 3 8
-N127- 3 6
-N291- 3 7
-N292- 3 23
-N323- 3 21
-N324- 3 22
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken
Protected by terminals.
copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Ifwith
necessary,
respect to the repair the
correctness faulty wiring
of information connection.
in this document. Copyright by AUDI AG.

If the specified values were obtained:

– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
Assembly is performed in the reverse order of removal, note the
following:
Final procedures
After repair work, the following work steps must be performed in
the following sequence:
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase the DTC memory. ⇒ page 7 .
3- If the DTC memory was erased, generate readiness code.
⇒ page 24 .
– End diagnosis and switch ignition off.

194 Rep. Gr.28 - Ignition/Glow Plug System

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

38 – Automatic Transmission - Gears, Hydraulic Controls

1 Transmission Regulating Electrical
Components, Checking

WARNING

Observe the following for all installations, especially in engine

compartment due to lack of room:
♦ Route lines of all types (e.g. for fuel, hydraulic, EVAP can‐
ister system, coolant and refrigerant, brake fluid, vacuum)
and electrical wiring so that the original path is followed.
♦ Watch for sufficient clearance to all moving or hot com‐
ponents.
♦ Shift selector lever into position -P- and engage parking
brake before working with the engine running.

WARNING

♦ Test equipment must always be secured to the rear seat

and operated by a second person.
If test and measuring equipment is operated from the passen‐
ger seat, the person seated could be injured in the event of an
accident involving deployment of the passenger-side airbag.
The use of nails, paper clips, or another unauthorized materials
to back-probe electrical harness connectors is strictly prohibi‐
ted and may cause damage to the electrical harness connec‐
tors, terminal ends or damage to a component. Use only the
manufacturers test lead kit or an equivalent aftermarket test
lead kit for back-probing all electrical harness connectors.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
⇒ “1.1 Multi-Function Transmission Range Switch, Checking”,
page 196
⇒ “1.2 Transmission Input Speed Sensor, Checking”, page 197
⇒ “1.3 Transmission Output Speed Sensor, Checking”,
page 198
⇒ “1.4 Transmission Fluid Temperature Sensor, Checking”, page
199
⇒ “1.5 Solenoid Valve 1, Checking”, page 200
⇒ “1.6 Automatic Transmission Pressure Regulating Valves,
Checking”, page 201
For all Automatic Transmission- Gears, Hydraulic controls com‐
ponent locations.
For all Automatic Transmission- Gears, Hydraulic controls re‐
moval/installation procedures and torque specifications.
Check the Technical Bulletins for information that may supersede
any information included in this manual.

1. Transmission Regulating Electrical Components, Checking 195

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

♦ All manufacturers special tools as well as common tools may

contain a manufacturer specific part number. These tools may
be substituted with an equivalent aftermarket tool or are avail‐
able for purchase through Audi. Refer to ⇒ Tool catalog .
♦ Manufacturers special tools as well as common tools that con‐
tain a manufacturer specific part number may be referenced
in the test procedure illustrations showing the tool use or in‐
stallation. If the manufacturer specific tool is not being used,
an equivalent aftermarket tool may be installed in the same
manner as the manufacturers special tool.
♦ The manufacturers test box Test Box 105 Pin - VAG1598/42-
is available for purchase or rental. Refer to the ⇒ Tool catalog .
♦ Certainly you have received an electrical shock once before
when touching something made out of metal. The reason for
this is the electrostatic charge of the human body. This charge
can lead to functional problems by touching the electrical com‐
ponents of the transmission and selector lever mechanism.
Touch a grounded object, e.g. a water pipe or a hoist, before
working on the electrical components!
♦ Do not make direct contact on electrical harness connector
terminals!
♦ If special testing equipment is required during road test, note
the following:

1.1 Multi-Function Transmission Range

Switch, Checking

Note

The Multi-Function Transmission Range (TR) Switch - F125- is a

component of the Mechatronic unit and cannot be replaced sep‐
arately.

Requirements
• Control Module with indicator unit in the Instrument Cluster
Control Module - J285- must be OK.
• The battery voltage must be at least 12.5 Volts.
• All electrical consumers must be switched off.
• The parking brake must be engaged.
• The elector lever must be in the “P” position.
• The Ground (GND) connections to transmission must be OK.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Test permitted
procedure unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .
Start diagnosis
– Switch the ignition on.
– Depress the brake pedal and maintain depressed.
– Shift the selector lever into all positions.

196 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

The selector lever position must correspond to the display of the

Control Module with the indicator unit in the Instrument Cluster
Control Module - J285- .
– Switch the ignition off.
If the selector lever position does not correspond to the display of
the Control Module with indicator unit in the Instrument Cluster
Control Module - J285- :
– Disconnect the Transmission Control Module (TCM) - J217-
electrical harness connector -direction of the arrow-.
– Observe safety precautions.
– Check the electrical harness connector for contact corrosion
and ingress of water.
If the electrical harness connector is not OK:
– Repair the malfunction and repeat the test sequence.
If the electrical harness connector is OK:
– Check the wiring according to the wiring diagram:
If no malfunctions are found in the wiring:
– Replace the Mechatronic unit in the transmission.

Note

The Transmission Control Module (TCM) - J217- is a component

of the Mechatronic unit and cannot be replaced separately.

Final procedures
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

1.2 Transmission Input Speed Sensor,

Checking

Note

The Transmission Input Speed (RPM) Sensor - G182- is a com‐

ponent of the Mechatronic unit in the transmission.

Requirements
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
• The battery voltage must be at leastpermitted
12.5 Volts.
unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
• All electrical consumers must be switched off.
• The parking brake must be engaged.
• The elector lever must be in the “P” position.
• The Ground (GND) connections to transmission must be OK.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .

1. Transmission Regulating Electrical Components, Checking 197

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Start diagnosis
– Disconnect the Transmission Control Module (TCM) - J217-
electrical harness connector -direction of the arrow-.
– Observe safety precautions.
– Check the electrical harness connector for contact corrosion
and ingress of water.
If the electrical harness connector is not OK:
– Repair the malfunction.
If the electrical harness connector is OK:
– Check the wiring according to the wiring diagram:
If no malfunctions are found in the wiring:
– Replace the Mechatronic unit in the transmission.

Note

The The Transmission Input Speed (RPM) Sensor - G182- is a

component of the Mechatronic unit and cannot be replaced sep‐
arately.

Final procedures
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

1.3 Transmission Output Speed Sensor,

Checking

Note

The Transmission Output Speed (RPM) Sensor - G195- is a com‐

ponent of the Mechatronic unit in the transmission.

Requirements
• The battery voltage must be at least 12.5 Volts.
• All electrical consumers must be switched off.
• The parking brake must be engaged.
• The elector lever must be in the “P” position.
• The Ground (GND) connections to transmission must be OK.
Test procedure Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Perform a preliminary check to verify
with respect the customers
to the correctness complaint.
of information in this document. Copyright by AUDI AG.
Refer to ⇒ page 23 .

198 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

The Transmission Output Speed (RPM) Sensor - G195- is a com‐

ponent of the Mechatronic unit and cannot be replaced separate‐
ly.

Final procedures
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

1.4 Transmission Fluid Temperature Sen‐

sor, Checking

Note

The Transmission Fluid Temperature Sensor - G93- is a compo‐

nent of the Mechatronic unit and cannot be replaced separately.

1. Transmission Regulating Electrical Components, Checking 199

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

The Transmission Fluid Temperature Sensor - G93- is a compo‐

nent of the Mechatronic unit and cannot be replaced separately.

Final procedures
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

1.5 Solenoid Valve 1, Checking

Note

The Solenoid Valve 1 - N88- is a component of the Mechatronic

unit and cannot be replaced separately.

Requirements
• The battery voltage must be at least 12.5 Volts.
• All electrical consumers must be switched off.
• The parking brake must be engaged.
• The elector lever must be in the “P” position.
• The Ground (GND) connections to transmission must be OK.
Test procedure Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– Perform a preliminary check to verify the customers complaint.
with respect to the correctness of information in this document. Copyright by AUDI AG.
Refer to ⇒ page 23 .

200 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

The SolenoidProtected
Valve by1 copyright.
- N88- Copying
is a component of the Mechatronic
unit and cannot be replaced separately.
for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Final procedures
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

1.6 Automatic Transmission Pressure Reg‐

ulating Valves, Checking

Note

The Automatic Transmission Pressure Regulating Valve 1 -

N215- , Automatic Transmission Pressure Regulating Valve 2 -
N216- , Automatic Transmission Pressure Regulating Valve 3 -
N217- , Automatic Transmission Pressure Regulating Valve 4 -
N218- , Automatic Transmission Pressure Regulating Valve 5 -
N233- , and the Automatic Transmission Pressure Regulating
Valve 6 - N371- are components of the Mechatronic unit in the
transmission.

1. Transmission Regulating Electrical Components, Checking 201

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Note

The Automatic Transmission Pressure Regulating Valve 1 -

Final procedures
1permitted
- Check the DTC by memory. ⇒AGpage 6 .guarantee or accept any liability
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
unless authorised AUDI AG. AUDI does not
with respect to the correctness of information in this document. Copyright by AUDI AG.
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

202 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2 Transmission Control Module

⇒ “2.1 Transmission Control Module Voltage Supply, Checking”,
page 203
⇒ “2.2 Transmission Control Module, Replacing”, page 205
The Transmission Control Module (TCM) - J217- receives infor‐
mation from the components that affect the shifts and forwards
this information to the pressure regulator valves of the mecha‐
tronic, which control the slide valves in the valve body.

2.1 Transmission Control Module Voltage

Supply, Checking

Note

The Transmission Control Module (TCM) - J217- is a component

of the mechatronic unit in the transmission and cannot be re‐
placed separately.

Special tools and workshop equipment required

♦ Multimeter .
♦ Wiring diagram.
Requirements
• The Transmission Control Module (TCM) - J217- fuses OK.
• The battery voltage must be at least 12.5 volts.
• The Ground (GND) connections at the transmission OK.
• The parking brake engaged.
• The selector lever of automatic transmission in position “P”.
• All electrical consumers switched off.
• The ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .

2. Transmission Control Module 203

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Start diagnosis
– Disconnect the Transmission Control Module (TCM) - J217-
electrical harness connector -direction of the arrow-.
– Check the electrical harness connector for damage, contact
corrosion, or ingress of water.
If the electrical harness connector is not OK:
– Repair the malfunction.
If the electrical harness connector is OK:
Checking voltage
– Switch the ignition on.
– Using a Multimeter , check the Power Supply Relay (terminal
15) - J329- socket 2/87 to Ground (GND).
Specified value: battery voltage.
– Switch the ignition off.
If the specified value was not obtained:
– Check the wiring from the Power Supply Relay (terminal 15) -
J329- socket 2/87 to the Transmission Control Module (TCM)
- J217- electrical harness connector terminal 9 for an open
circuit or a short circuit.
– If necessary, repair the faulty wiring connection.
If the specified value was obtained:
– Using a Multimeter , check the Transmission Control Module
(TCM) - J217- electrical harness connector terminal 14 to
Ground (GND).
Specified value: battery voltage.
If the specified value was obtained:
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not

– Check the wiring from the Battery to the

to theTransmission Control
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect correctness of information in this document. Copyright by AUDI AG.
Module (TCM) - J217- electrical harness connector terminal
14 for an open circuit or a short circuit.
– If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking Ground (GND)
– Using a Multimeter , check the Transmission Control Module
(TCM) - J217- electrical harness connector terminals 13 and
16 to Ground (GND) for resistance.
Specified value: 1.5 Ω
If the specification was not obtained:
– Check the wiring for a an open circuit.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
– Replace the Mechatronic unit in the transmission.
Final procedures
1- Check the DTC memory. ⇒ page 6 .
2- If necessary, erase DTC memory of the Transmission Con‐
trol Module (TCM) - J217- . ⇒ page 7 .
3- Generate readiness code. ⇒ page 24 .

204 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

2.2 Transmission Control Module, Replac‐

ing

Note

♦ The Transmission Control Module (TCM) - J217- is a compo‐

nent of the mechatronic unit in the transmission and cannot be
replaced separately.
♦ To achieve optimal anti-theft protection for the vehicle, an anti-
theft immobilizer was installed. The anti-theft immobilizer is a
system for enabling/locking the Transmission Control Module
(TCM) - J217- .
♦ To perform adaptation of the anti-theft immobilizer.

Work procedure
Check the identification of the previous Transmission Control
Module (TCM) - J217- as follows:
– Connect the scan tool.
– Switch the ignition on.
– Select “Diagnostic mode 9: Vehicle information.”
– Select the“Test-ID 04:byCalibration
Protected identification”.
copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
– The Transmission withControl
respect to Module (TCM)
the correctness - J217-
of information identification
in this document. Copyright by AUDI AG.
will be displayed, e.g.: 09G27750 L 0301
– End diagnosis and switch the ignition off.
– Replace the Mechatronic unit in the transmission: Refer to
Transmission Repair Manual.
– Check the identification of the new Transmission Control Mod‐
ule (TCM) - J217- to ensure it matches the old Transmission
Control Module (TCM) - J217- .
– Code the Transmission Control Module (TCM) - J217- .
– Generate a readiness code. Refer to ⇒ page 24 .

2. Transmission Control Module 205

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

3 CAN-Bus Terminal Resistance, TCM

to ECM, Checking
CAN-Bus terminal resistance, Transmission Control Module
(TCM) - J217- to Engine Control Module (ECM) - J623- , checking
The Engine Control Module (ECM) - J623- communicates with all
databus capable control modules via a CAN databus.
These databus capable control modules are connected via two
data bus wires which are twisted together (CAN_High and
CAN_Low), and exchange information (messages). Missing in‐
formation on the databus is recognized as a malfunction and
stored.
Trouble-free operation of the CAN-bus requires that it have a ter‐
minal resistance. The central terminal resistor is located in the
Engine Control Module (ECM) - J623- .
Special tools and workshop equipment required
♦ Multimeter .
♦ Wiring diagram.
Test requirement
• A CAN-Bus malfunction was recognized.
• The Engine Control Module (ECM) - J623- fuses OK.
• Battery voltage at least 12.5 V.
• Ignition switched off.
Test procedure
– Perform a preliminary check to verify the customers complaint.
Refer to ⇒ page 23 .

206 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

Start diagnosis
– Disconnect the Transmission Control Module (TCM) - J217-
electrical harness connector -direction of the arrow-.

Note

The Engine Control Module (ECM) - J623- must remain connec‐

ted for the following step.

– Using a Multimeter , check the Transmission Control Module

(TCM) - J217- electrical harness connector terminals 2 to 6 for
resistance.
Specified value: 60 to 72 Ω (at approx. 20° C)
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
– Replace the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following
step.
– Install the test box. Refer to Fuel Injection and Ignition Repair
Manual.
If the manufacturers test box is not being used. Perform the fol‐
lowing step.
– Remove the Engine Control Module (ECM) - J623- . Refer to
⇒ page 168 .
– Using a Multimeter , check the Transmission Control Module
(TCM) - J217- electrical harness connector to the Engine Con‐
trol Module (ECM) - J623- electrical harness connector T94
for resistance.
Transmission Control Mod‐ Engine Control Module (ECM) -
ule (TCM) - J217- electrical J623- electrical
Protected connector
by copyright. T94
Copying for ter‐
private or commercial purposes, in part or in whole, is not
harness connector termi‐ minals or test box sockets
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
nals
2 (CAN Bus Low) 67
6 (CAN Bus High) 68
Specified value: 1.5 Ω Max.
If the specified value was not obtained:
– Check the wiring connection for an open circuit, short circuit
to Battery (+) or Ground (GND).
– Check the wiring connection for damage, corrosion, lose or
broken terminals.
– If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:

3. CAN-Bus Terminal Resistance, TCM to ECM, Checking 207

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

– Replace the Mechatronic unit in the transmission.

208 Rep. Gr.38 - Automatic Transmission - Gears, Hydraulic Controls

Audi A4 2005 ➤
Generic Scan Tool - Edition 11.2014

4 Continuously Variable Transmission,

Checking
For electrical diagnosis of the Continuously Variable Transmis‐
sion (CVT) 01J, refer to the Transmission Repair Manual.

4. Continuously Variable Transmission, Checking 209

Cautions & Warnings

Please read these WARNINGS and CAUTIONS before proceeding with maintenance
and repair work. You must answer that you have read and you understand these
WARNINGS and CAUTIONS before you will be allowed to view this information.

•= If you lack the skills, tools and equipment, or a suitable workshop for any procedure described in
this manual, we suggest you leave such repairs to an authorized Audi retailer or other qualified
shop. We especially urge you to consult an authorized Audi retailer before beginning repairs on
any vehicle that may still be covered wholly or in part by any of the extensive warranties issued by
Audi.

•= Disconnect the battery negative terminal (ground strap)whenever you work on the fuel system or
the electrical system. Do not smoke or work near heaters or other fire hazards. Keep an approved
fire extinguisher handy.

•= Audi is constantly improving its vehicles and sometimes these changes, both in parts and
specifications, are made applicable to earlier models. Therefore, part numbers listed in this
manual are for reference only. Always check with your authorized Audi retailer parts department
for the latest information.

•= Any time the battery has been disconnected on an automatic transmission vehicle, it will be
necessary to reestablish Transmission Control Module (TCM) basic settings using the VAG 1551
Scan Tool (ST).

•= Never work under a lifted vehicle unless it is solidly supported on stands designed for the purpose.
Do not support a vehicle on cinder blocks, hollow tiles or other props that may crumble under
continuous load. Never work under a vehicle that is supported solely by a jack. Never work under
the vehicle while the engine is running.

•= For vehicles equipped with an anti-theft radio, be sure of the correct radio activation code before
disconnecting the battery or removing the radio. If the wrong code is entered when the power is
restored, the radio may lock up and become inoperable, even if the correct code is used in a later
attempt.

•= If you are going to work under a vehicle on the ground, make sure that the ground is level. Block
the wheels to keep the vehicle from rolling. Disconnect the battery negative terminal (ground
strap) to prevent others from starting the vehicle while you are under it.

•= Do not attempt to work on your vehicle if you do not feel well. You increase the danger of injury to
yourself and others if you are tired, upset or have taken medicine or any other substances that
may impair you or keep you from being fully alert.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
•= Never run the enginepermitted
unless theauthorised
unless work area is AG.
by AUDI wellAUDI
ventilated.
AG does notCarbon monoxide
guarantee or (CO) kills.
accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

•= Always observe good workshop practices. Wear goggles when you operate machine tools or work
with acid. Wear goggles, gloves and other protective clothing whenever the job requires working
with harmful substances.

•= Tie long hair behind your head. Do not wear a necktie, a scarf, loose clothing, or a necklace when
you work near machine tools or running engines. If your hair, clothing, or jewelry were to get
caught in the machinery, severe injury could result.

=Page 1 of 3
© 2002 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual
property rights of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be
reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be
modified or reposted to other sites, without the prior expressed written permission of the publisher.
Version 1.0
Cautions & Warnings
•= Do not re-use any fasteners that are worn or deformed in normal use. Some fasteners are
designed to be used only once and are unreliable and may fail if used a second time. This
includes, but is not limited to, nuts, bolts, washers, circlips and cotter pins. Always follow the
recommendations in this manual - replace these fasteners with new parts where indicated, and
any other time it is deemed necessary by inspection.

•= Illuminate the work area adequately but safely. Use a portable safety light for working inside or
under the vehicle. Make sure the bulb is enclosed by a wire cage. The hot filament of an
accidentally broken bulb can ignite spilled fuel or oil.

•= Friction materials such as brake pads and clutch discs may contain asbestos fibers. Do not create
dust by grinding, sanding, or by cleaning with compressed air. Avoid breathing asbestos fibers and
asbestos dust. Breathing asbestos can cause serious diseases such as asbestosis or cancer, and
may result in death.

•= Finger rings should be removed so that they cannot cause electrical shorts, get caught in running
machinery, or be crushed by heavy parts.

•= Before starting a job, make certain that you have all the necessary tools and parts on hand. Read
all the instructions thoroughly, do not attempt shortcuts. Use tools that are appropriate to the work
and use only replacement parts meeting Audi specifications. Makeshift tools, parts and
procedures will not make good repairs.

•= Catch draining fuel, oil or brake fluid in suitable containers. Do not use empty food or beverage
containers that might mislead someone into drinking from them. Store flammable fluids away from
fire hazards. Wipe up spills at once, but do not store the oily rags, which can ignite and burn
spontaneously.

•= Use pneumatic and electric tools only to loosen threaded parts and fasteners. Never use these
tools to tighten fasteners, especially on light alloy parts. Always use a torque wrench to tighten
fasteners to the tightening torque listed.

•= Keep sparks, lighted matches, and open flame away from the top of the battery. If escaping
hydrogen gas is ignited, it will ignite gas trapped in the cells and cause the battery to explode.

•= Be mindful of the environment and ecology. Before you drain the crankcase, find out the proper
way to dispose of the oil. Do not pour oil onto the ground, down a drain, or into a stream, pond, or
lake. Consult local ordinances that govern the disposal of wastes.

•= The air-conditioning (A/C) system is filled with a chemical refrigerant that is hazardous. The A/C
system should be serviced only by trained automotive service technicians using approved
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
refrigerant recovery/recycling equipment, trained in related safety
permitted unlessprecautions, and
authorised by AUDI AG. familiar
AUDI AG does with
not guarantee or accept any liability
regulations governing the discharging and disposal of automotive
with respect tochemical refrigerants.
the correctness of information in this document. Copyright by AUDI AG.

•= Before doing any electrical welding on vehicles equipped with anti-lock brakes (ABS), disconnect
the battery negative terminal (ground strap) and the ABS control module connector.

•= Do not expose any part of the A/C system to high temperatures such as open flame. Excessive
heat will increase system pressure and may cause the system to burst.

=Page 2 of 3
© 2002 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual
property rights of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be
reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be
modified or reposted to other sites, without the prior expressed written permission of the publisher.
Version 1.0
Cautions & Warnings
•= When boost-charging the battery, first remove the fuses for the Engine Control Module (ECM), the
Transmission Control Module (TCM), the ABS control module, and the trip computer. In cases
where one or more of these components is not separately fused, disconnect the control module
connector(s).

•= Some of the vehicles covered by this manual are equipped with a supplemental restraint system
(SRS), that automatically deploys an airbag in the event of a frontal impact. The airbag is operated
by an explosive device. Handled improperly or without adequate safeguards, it can be accidentally
activated and cause serious personal injury. To guard against personal injury or airbag system
failure, only trained Audi Service technicians should test, disassemble or service the airbag
system.

•= Do not quick-charge the battery (for boost starting) for longer than one minute, and do not exceed
16.5 volts at the battery with the boosting cables attached. Wait at least one minute before
boosting the battery a second time.

•= Never use a test light to conduct electrical tests of the airbag system. The system must only be
tested by trained Audi Service technicians using the VAG 1551 Scan Tool (ST) or an approved
equivalent. The airbag unit must never be electrically tested while it is not installed in the vehicle.

•= Some aerosol tire inflators are highly flammable. Be extremely cautious when repairing a tire that
may have been inflated using an aerosol tire inflator. Keep sparks, open flame or other sources of
ignition away from the tire repair area. Inflate and deflate the tire at least four times before
breaking the bead from the rim. Completely remove the tire from the rim before attempting any
repair.

•= When driving or riding in an airbag-equipped vehicle, never hold test equipment in your hands or
lap while the vehicle is in motion. Objects between you and the airbag can increase the risk of
injury in an accident.

I have read and I understand these Cautions and Warnings.

Page 3 of 3
= Copying for private or commercial purposes, in part or in whole, is not
Protected by copyright.
© 2002 Audi of America, Inc. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect
All rights reserved. Information contained in this document is based to theinformation
on the latest correctness of information
available in this
at the time document.
of printing and Copyright bythe
is subject to AUDI AG. and other intellectual
copyright
property rights of Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be
reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be
modified or reposted to other sites, without the prior expressed written permission of the publisher.
Version 1.0

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