Component Identifiers (CID¹)

Module Identifier (MID²) RENR9554 Electrical Schematic Symbols And Definitions

Engine Control Module November 2005
CID
(MID No. 036)
Component
J2 ECM connector Symbols
0001 Cylinder #1 Injector
0002 Cylinder #2 Injector 6 No 6 injector return
0003 Cylinder #3 Injector
0004 Cylinder #4 Injector
62 No 6 injector T

0005 Cylinder #5 Injector 7 No 5 injector return Pressure Temperature Level Flow Circuit Breaker
0006 Cylinder #6 Injector Symbol Symbol Symbol Symbol Symbol
0041 ECM (Engine Control Module) 8 Volt DC Supply 63 No 5 injector
0091 Throttle Position
8 No 4 injector return
0100 Engine Oil Pressure
0110 Engine Coolant Temperature 64 No 4 injector Symbols And Definitions
0168 System Voltage
0172 Intake Manifold Pressure 33 No 3 injector return Fuse - A component in an electrical circuit that will open the circuit if too much current flows
0190 Engine speed Signal through it.
59 No 3 injector
0247 J.1939 Data Link
34 No 2 injector return Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The
0253 Personality Module
circle indicates that the component has screw terminals and a wire can be disconnected from it.
0261 Engine Timing
0262 5 Volt Sensor DC Supply
58 No 2 injector
Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.).
0268 Programmable Parameters 35 No 1 injector return
0342 Secondary Engine Speed Signal
No circle indicates that the wire cannot be disconnected from the component.
0526 Turbo Wastegate Actuator 57 No 1 injector
0774 Secondary Throttle Position Sensor
46 IMP Power supply (+5V) Ground (Wired): This indicates that the component is connected to a grounded wire. The
1639 Machine Security System Module grounded wire is fastened to the machine.
1743 Engine Mode Selection Switch 38 IMP return
1797 Fuel Rail Pressure Valve 1 Solenoid
55 IMP signal
1785 Intake Manifold Pressure Ground (Case): This indicates that the component does not have a wire connected to ground.
1797 Fuel Rail Pressure Sensor 47 Oil pressure Power (+5V) It is grounded by being fastened to the machine.
1834 Ignition Key Switch
2246 Glow Plug Start Aid Relay
39 Oil pressure
¹ The CID is a diagnostic code that indicates which circuit is faulty.
sensor return Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the
² The MID is a diagnostic code that indicates which electronic control module 56 Oil pressure contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
diagnosed the fault.
sensor signal
48 FMP sensor
C6.6 Industrial Engine Sender: A component that is used with a temperature or pressure gauge. The sender
power supply (+5V) measures the temperature or pressure. Its resistance changes to give an indication to
FMI No.
0
Failure Mode Identifiers (FMI)¹
Failure Description
Data valid but above normal operational range.
40 FMP sensor ground Electrical System T
the gauge of the temperature or pressure.

1 Data valid but below normal operational range. 51 FMP sensor signal Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity.
2
3
Data erratic, intermittent, or incorrect.
Voltage above normal or shorted high.
43 Coolant temperature 6661-UP It has a coil that makes an electromagnet when current flows through it. The
electromagnet can open or close the switch part of the relay.
signal
4 Voltage below normal or shorted low.
5 Current below normal or open circuit. 42 IMT Signal
Solenoid: A solenoid is an electrical component that is activated by electricity. It has a
6 Current above normal or grounded circuit.
37 Temperature sensor coil that makes an electromagnet when current flows through it. The electromagnet
7 Mechanical system not responding properly.
return can open or close a valve or move a piece of metal that can do work.
8 Abnormal frequency, pulse width, or period.
9 Abnormal update. 10 Speed sensor
10 Abnormal rate of change. power (+8V) MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is
11 Failure mode not identifiable. activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch)
52 Crankshaft position
12 Bad device or component. that make electromagnet when current flows through them. It also has an internal switch that places
sensor signal
13 Out of calibration. the latch coil circuit open at the time the coil latches.
14 Parameter failures. 53 Secondary position
15 Parameter failures. sensor signal
16 Parameter not available.
17 Module not responding. 25 Fuel injection pump Harness And Wire Symbols
18 Sensor supply fault. PWM signal
Wire, Cable, or Harness Component
19 Condition not met. 26 Fuel injection pump Assembly Identification Part Number
20 Parameter failures. solenoid PWM return Pin Socket Wire Color Fuse
¹The FMI is a diagnostic code that indicates what type of failure has occurred.
44 Wastegate return P J 105-9344

17 Wastegate PWM 325-PK 1

signal Receptacle
Event Codes
Machine Control 18 Bat + Single Wire Circuit Number
Connector Identification
Event Code Condition 45 Bat -
Plug
E172 High Air Filter Restriction 2
21 CDL + 200-BK
E232 High Fuel / Water Separator Water Level
E360 Low Engine Oil Pressure 20 CDL -
Ground Connection Pin or Socket Number
E361 High Engine Coolant Temperature 23 J1939 -
E362 Engine Overspeed
24 J1939 + 1 Typical representation of a Deutsch 1 Typical representation of a Sure-Seal
E396 High Fuel Rail Pressure connector. The plug contains all connector. The plug and receptacle
E398 Low Fuel Rail Pressure 2 sockets and the receptacle contains 2 contain both pins and sockets.
E539 High Intake Manifold Air Temperature all pins.
E2143 Low Engine Coolant Temperature

© 2005 Caterpillar Printed in U.S.A.

All Rights Reserved

Related Electrical Service Manuals ECM Fuel pressure sensor

Title Form Number
Troubleshooting: C6.6 Industrial Engine SENR9969

Oil
pressure
sensor
Coolant temperature Inlet air pressure Inlet air temperature
sensor sensor sensor

P681 P682 P683

Coolant temperature sensor Inlet air pressure sensor

Inlet air temperature sensor

RENR9554
Coolant temperature Primary

12 Page
Sensor Inlet air pressure sensor position
and sensor
Inlet air temperature sensor

Fuel pressure Oil pressure

sensor sensor

Fuel pressure sensor

Fuel injection pump
solenold

Primary position
sensor

Primary posisition
Secondary position Oil pressure
sensor
sensor sensor
Secondary position
sensor

Alternator

Starting motor Solenoid

 P2 J2 ECM Connector System Overview
J693 P693 P691 P692 P693
T962-BK 1 X931-YL 6
T306
Internal connection to the External connection to the T956-BK 2 X925-PK 62 J691 J692 J693
electronic fuel injector electronic fuel injector T961-BK 3 X930-GY 7
T305
T955-BK 4 X924-BR 63 P511
Harness Connector J692 P692 T301 T302 T303 T304 T305 T306
Connector Harness T960-BK X929-BU 8
INJECTOR 1
side side side side CYLINDER 6 T304
T954-BK 2 X923-OR 64
INJECTOR T959-BK 3 X928-GN 33 J511
CYLINDER 5 T303
T953-BK 4 X922-WH 59
P532
J691 P691 No.1 No.2 No.3 No.4 No.5 No.6
INJECTOR
CYLINDER 4
T958-BK 1 X927-YL 34
T302
T952-BK 2 X921-PK 58
INJECTOR
CYLINDER 3
T957-BK 3 X926-GY 35
T301
T951-BK 4 X920-BR 57 P402
1 INJECTOR
J1 P401
CYLINDER 2
2
3 4 4 3 2 1 P200
INJECTOR
CYLINDER 1 1 T997-OR 46 P2/J2
P200
Inlet Manifold 2
Pressure Sensor T993-BR 38
Pressure connector Temperature connector 3
X731-BU 55 P228
P201
J23 P201
Oil 1 L730-OR 47
Pressure 2
Sensor Y947-BR 39
3
994-GY 56 P103
P228
1 R997-0R 48
Fuel Rail P100
Pressure Sensor 2 Y948-BR 40
3
Pressure Pressure Temperature Temperature Y946-BU 51
sensor sensor P100
sensor sensor
Coolant 1
1 Voltage Temperature
1 Signal Sensor 2 995-BU 43 P2 Harness side
2 Ground 2 Ground C967-BU 42
L731-BR 37 Pin 25 Pin 32 Pin 57 Pin 64
3 Signal P103
Inlet Manifold 1
Temperature
Sensor 2

P401
Crankshaft 1
Position 996-GN 10
Sensor 2
E965-BU 52
P920-BR 53
1 2 3 1 2
P402
Secondary 1
Postion Pin 1 Pin 8 Pin 33 Pin 40
Sensor 2
P532
Side view
1
Fuel Injection
Pump Solenoid 2

Y950-YL 25
Y951-PU 26
C211-BK 44
P511
M795-WH 17
Wastegate 1
Solenoid
2
Coolant
temperature
Inlet air pressure connector J23
connector A 101-RD 18
Diagnostic Connector E B 229-BK 45 ECM Side
D
Inlet air temperature J 23 C C
Diagnostic D 944-OR 21 Pin 64 Pin 57 Pin 32 Pin 25
Fuel injection pump solenoid connector B Connector
connector E 945-BR 20
F Y793-YL 23
F
A G Y792-PK 24
Secondary position J H
connector G J
H
RENR9554

(+) BATTERY
Connection for
(+) BATTERY SWITCHED
No.1 and 2
12 Page, Color 2

STARTING CIRCUIT
electronic injector Pin 1
(-) BATTERY / SENSOR RETURN Pin 40 Pin 33 Pin 8
SENSOR / ACTUATOR SUPPLY

SIGNAL PLUS TO ECM

SIGNAL MINUS TO ECM
Oil pressure connector
CONTROL PLUS FROM ECM
CONTROL MINUS FROM ECM

CAT DATA LINK

(J1939) CAN DATA LINK
Battery Pin 40

-
Starting and charging Pin 64
Connection for No.3 and 4 J1
electronic injector Pin 57
Pin 33
+ Pin 32
Pin 8
Relay Fuse Pin 25
J23 Pin 1
Diagnostic connector
P2 connector Pin 1 Pin 25
30
50
Pin 8 J2
Pin 32
G
Pin 33
Fuel pressuure connector Pin 57
Resistors Pin 40
Starting motor optional Pin 64
Crankshaft position 300 ohms (24V)
sensor connector 100 ohms (12V)
Waste gate
Connection for No.5 and 6 B+
connector Key switch
Electronic D+
Alternator
injector W Ignition warning
light
THIS DIAGRAM IS FOR THE C6.6 INDUSTRIAL ENGINE(E797)