8G-2 Immobilizer Control System

Precautions
Precautions in Diagnosing Troubles • Do not leave ignition key in a place where
temperature is high. High temperature may cause
Petrol model: Refer to “PRECAUTIONS FOR damage to the transponder built in the ignition key.
DIAGNOSING TROUBLE” in Section 6-1.
Bi-Fuel CNG model: Refer to “PRECAUTIONS FOR
DIAGNOSING TROUBLE” in Section 6-2.

Precaution in Replacing Ignition Key

To register ignition key in case of replacing key(s) and/or
making spare key(s), the transponder code in the ignition
key is registered with ECM. Or the engine can not be
started up. For the registration procedure, refer to
“Ignition Key Registration”.

Precautions in Immobilizer System

• Do not turn ON ignition switch with ignition key in
contact with another one or quite close to another
one. Or, the immobilizer control system may detect I3RH0AA30003-01

some abnormal condition and prevent the engine from • Do not turn ignition switch to ON position by bringing
starting. radio antenna close to coil antenna. Or, the
immobilizer control system may detect some
abnormal condition and prevent the engine from
starting.

I3RH0AA30001-01

• Do not turn ON ignition switch by using ignition key

with any type of metal (1) wrapped its grip or in
contact with it. Or, the immobilizer control system may
I3RH0AA30004-01
detect some abnormal condition and prevent the
engine from starting.

I3RH0AA30002-01
 Immobilizer Control System 8G-3

General Description
Immobilizer Control System Description
The immobilizer control system is an anti-theft device that immobilizes the vehicle. It stops the engine from working
and prevents the vehicle from being stolen. It mainly consists of the following components. For immobilizer control
system components location, refer to “Immobilizer Control System Component Location”.
• ECM
• Immobilizer control module with the built-in coil antenna
• Ignition key with the built-in transponder
A code called the transponder code is memorized in the transponder. And, the code is registered with ECM. Basically,
when the ignition switch is turned ON, ECM reads the code by the coil antenna. Then, if the code in transponder in the
ignition key does not match with the one registered with ECM, ECM stops the operation signal of the fuel injection and
ignition coil so as not to start up the engine and turns the immobilizer indicator light blinks using CAN communication
lines.

Ignition key Combination meter

Transponder Immobilizer indicator light

[A]
Immobilizer control module Fuel injector

ECM
[B]
Petrol fuel injector

CNG control module

CNG fuel injector

: Serial communication
Ignition coil
: CAN communication
I9L60BA30005-01

[A]: Petrol model [B]: Bi-Fuel CNG model

On-Board Diagnostic System Description (Self-Diagnosis Function)

ECM diagnoses if there is any trouble with the immobilizer control system. The diagnostic information is stored as the
diagnostic trouble code (DTC) in ECM. To read the diagnostic information, use SUZUKI scan tool referring to “DTC
Check”.
With the ignition switch turned ON (but the engine at stop) regardless of the condition of the engine and emission
control system, ECM indicates whether there is any trouble with the immobilizer control system or not by either lighting
ON or blinking ON and OFF the immobilizer indicator light.

Immobilizer indicator light lights: (Engine can be started)

No trouble exists in the immobilizer control system. (After starting up the engine, the light turns OFF.)

Immobilizer indicator light blinks: (Engine can not be started)

There is some trouble in the immobilizer control system. Its diagnostic information is stored in ECM.
8G-4 Immobilizer Control System

Schematic and Routing Diagram

Immobilizer Control System Wiring Circuit Diagram

3 5 6
4
2 [A]YEL/BLK
BLK/WHT G06-1 G06-3 G58-29
[B]GRN/ORN
[A]YEL/RED
7 IG1 BLK/ORN G06-2 G06-4 G58-30
[B]BLK/RED

8
[A]G21-6
WHT WHT G58-35
[B]G21-5
10 10
2 [A]G21-8 [A]RED [A]RED
[B]G21-7 [B]BLU [B]BLU G58-34

[A]G21-7 9
WHT/BLK
[B]G21-6
1
[A]G21-9
RED/BLK
[B]G21-8

[A]: K10B model 2. Fuse 5. Immobilizer control module 8. Immobilizer indicator light
[B]: F8D model 3. Ignition switch 6. ECM 9. DLC
1. Battery 4. Circuit fuse box 7. Combination meter 10. CAN driver
 Immobilizer Control System 8G-5

Component Location
Immobilizer Control System Component Location

[A] [B]
2

[A]: Without tachometer 1. ECM 3. Immobilizer control module

[B]: With tachometer 2. Immobilizer indicator light 4. Ignition key
8G-6 Immobilizer Control System

Diagnostic Information and Procedures

Immobilizer Control System Check
Step Action Yes No
1 Engine start check Immobilizer control Go to Step 2.
1) Start engine. system is in good
condition.
Does engine start?
2 DTC check Go to applicable DTC GO to “ENGINE BASIC
1) Check DTC referring to “DTC Check”. troubleshooting. INSPECTION FLOW
TABLE”.
Is DTC detected?
Petrol model: Refer to
“Engine Basic
Inspection ” in Section
6E2.
Bi-Fuel CNG model:
Refer to “ENGINE
BASIC INSPECTION
FLOW TABLE” of
“ENGINE
DIAGNOSTIC FLOW
TABLE” in Section 6-2.

DTC Check
Refer to “DTC check”.
Petrol model: Refer to “DTC Check” in Section 6E2.
Bi-Fuel CNG model: Refer to “DTC Check” in Section 6E3.

DTC Clearance
Refer to “DTC Clearance”.
Petrol model: Refer to “DTC Clearance” in Section 6E2.
Bi-Fuel CNG model: Refer to “DTC Clearance” in Section 6E3.
 Immobilizer Control System 8G-7

DTC Table
ECM
NOTE
ECM detects DTC. Immobilizer control module does not detects DTC.

Immobilizer
DTC No. Detecting Item Detecting Condition Indicator
Light
Transponder code in transponder built in
P1614 Transponder Response Error ignition key cannot be read through Blinking
immobilizer control module.
Communication error between immobilizer
P1621 Immobilizer Communication Line Error Blinking
control module and ECM.
P1622 EEPROM Reading / Writing Error EEPROM in ECM is corrupted. Blinking
Transponder code in the transponder built in
P1623 Unregistered Transponder Blinking
the ignition key is invalid.
P1625 Immobilizer Antenna Error Immobilizer control module is faulty. Blinking

NOTE
If any DTC other than the above DTCs is detected, refer to “DTC Table: Petrol model” in Section 6E2 or
“DTC Table (ECM): Bi-Fuel CNG model” in Section 6E3.

Scan Tool Data

Immobilizer control module
SUZUKI scan tool displays the following data. For detailed information on operation of SUZUKI scan tool, refer to
“SUZUKI SDT Immobilizer Control System Operator's Manual”.
Special tool
: SUZUKI scan tool (SUZUKI-SDT)
Scan Tool Data
Definition Initial Setting
(Registration Information Data)
Number of the Registered Immobilizer Key The number of the transponder 2 keys
code that is registered with ECM. A
maximum of four transponder
codes can be registered.
Latest Year for the Key Registration The year which registered Different according to the
transponder code. registration year.
Latest Month for the Key Registration The month which registered Different according to the
transponder code. registration month.
8G-8 Immobilizer Control System

DTC P1614
Detecting Condition and Trouble Area
Detecting Condition Trouble Area
P1614: Transponder Response Error • Use of unregistered ignition key
Transponder code in transponder built in ignition key • Corruption of transponder in ignition key
cannot be read through immobilizer control module.
• Immobilizer control module
• ECM

Troubleshooting
NOTE
Before performing troubleshooting be sure to read “Precautions in Immobilizer System”.

Step Action Yes No

1 DTC check Go to applicable DTC Go to Step 2.
1) Check DTC referring to “DTC Check”. troubleshooting.

Is DTC P1625 detected?

2 Engine start check using the other registered ignition Register ignition key in Substitute a known-
key ECM and recheck. If good immobilizer
1) Start engine using the other registered ignition key. engine cannot be control module and
started up, replace the recheck engine start. If
Does engine start? faulty ignition key. engine can not start up,
substitute a known-
good ECM and recheck
engine start.
 Immobilizer Control System 8G-9

DTC P1621
Detecting Condition and Trouble Area
Detecting Condition Trouble Area
P1621: Immobilizer Communication Line Error • Poor connection at immobilizer control module
Communication error between immobilizer control module connector or ECM connector
and ECM. • Immobilizer control module power supply (includes
fuse)
• Immobilizer control module ground circuit
• Communication circuits between immobilizer control
module and ECM
• Immobilizer control module
• ECM

Wiring Diagram

5 6
3 4 A1 A3
2 2 2 [A]YEL/BLK
BLK/WHT G06-1 G06-3 [B]GRN/ORN G58-29

G06-2 G06-4 [A]YEL/RED G58-30

1 [B]BLK/RED
BLK/ORN
A2 A4

[C] [D]
G06
C42 G58
2 1 7 6 5 4 3 2 1 6 5 4 3 2 1 6 5 4 3 2 1
1 10 9 8 19 18 17 16 15 14 13 12 11 10 9 8 16 15 14 13 12 11 10 9 8 7 12 11 10 9 8 7
1 20 19 18 27 26 25 24 23 22 21 20 27 26 25 24 23 22 21 20 19 18 17
1 30 29 28 35 34 33 32 31 30 29 28 35 34 33 32 31 30 29 28

[A]: K10B model A2: Immobilizer control module ground circuit 3. Ignition switch
[B]: F8D model A3: Immobilizer control module signal circuit No.1 4. Circuit fuse box
[C]: ECM connector (View: A) A4: Immobilizer control module signal circuit No.2 5. Immobilizer control module
[D]: Immobilizer control module connector (View: A) 1. Battery 6. ECM
A1: Immobilizer control module power supply circuit 2. Fuse

Troubleshooting
Step Action Yes No
1 Immobilizer control module power supply wire circuit Go to Step 2. Repair circuit (includes
check fuse).
1) Disconnect immobilizer control module connector.
2) Check for proper terminal connection to immobilizer
control module.
3) If connections are OK, measure voltage between “G06-
1” terminal of immobilizer control module connector and
vehicle ground with ignition switch turned ON.

Is voltage 10 – 14 V?
2 Immobilizer control module ground wire circuit check Go to Step 3. Repair circuit.
1) Measure voltage between “G06-1” terminal and “G06-2”
terminal of immobilizer control module connector.

Is voltage 10 – 14 V?
8G-10 Immobilizer Control System

Step Action Yes No

3 Immobilizer control module signal circuit check Go to Step 4. Repair circuit.
1) Disconnect ECM “G58” connector with ignition switch
turned OFF.
2) Check for proper terminal connection to ECM.
3) If connections are OK, check that immobilizer control
module signal circuit (A3 / A4) is as follows.
• Wiring harness resistance of immobilizer control
module signal circuit is less than 3 .
• Insulation resistance between immobilizer control
module signal circuit and vehicle body ground is
infinity.
• Insulation resistance of wire harness is infinity
between immobilizer control module signal circuit
terminal and each terminal at immobilizer control
module connector.
• Circuit voltage of immobilizer control module signal
circuit is 0 – 1 V with ignition switch in ON position.

Is each immobilizer control module signal circuit in good

condition?
4 DTC Check Substitute a known End.
1) Replace immobilizer control module referring to good ECM and recheck
“Immobilizer Control Module and Installation”. DTC.
2) Recheck DTC referring to “DTC Check”.

Is DTC P1621 still detected?

DTC P1622
Detecting Condition and Trouble Area
Detecting Condition Trouble Area
P1622: EEPROM Reading / Writing Error ECM
EEPROM in ECM is corrupted.

Troubleshooting
Step Action Yes No
1 DTC check Replace ECM and Check for intermittent
1) Clear DTC referring to “DTC Clearance”. recheck DTC. trouble referring to
“INTERMITTENTS
2) Turn the ignition switch to OFF position.
AND POOR
3) Turn the ignition switch to ON position. CONNECTION
4) Recheck DTC referring to “DTC Check”. INSPECTION” in
Section 0A
Is DTC P1622 still detected?
 Immobilizer Control System 8G-11

DTC P1623
Detecting Condition and Trouble Area
Detecting Condition Trouble Area
P1623: Unregistered Transponder • Use of the unregistered ignition key
Transponder code in the transponder built in the ignition • Immobilizer control module
key is invalid.
• ECM

Troubleshooting
Step Action Yes No
1 Registration of the ignition key Substitute a known- End (ignition key was
1) Register the ignition key referring to “Ignition Key good immobilizer not registered).
Registration”. control module and
recheck DTC. If DTC
2) Clear DTC referring to “DTC Clearance”.
P1623 is still detected,
3) Check DTC referring to “DTC Check”. substitute a known-
Is DTC P1623 still detected? good ECM and recheck
DTC.

DTC P1625
Detecting Condition and Trouble Area
Detecting Condition Trouble Area
P1625: Immobilizer Antenna Error • Immobilizer control module
Immobilizer control module is faulty. • ECM

Troubleshooting
Step Action Yes No
1 DTC confirmation Substitute a known- Check for intermittent
1) Clear DTC referring to “DTC Clearance”. good immobilizer trouble referring to
control module and “INTERMITTENTS
2) Turn the ignition switch to OFF position.
recheck DTC. If DTC AND POOR
3) Turn the ignition switch to ON position. P1625 is still detected, CONNECTION
4) Check DTC referring to “DTC Check”. substitute a known- INSPECTION” in
good ECM and recheck Section 0A
Is DTC P1625 still detected? DTC.
8G-12 Immobilizer Control System

Repair Instructions
Immobilizer Control Module Removal Ignition Key Registration
and Installation To finish the registration of the ignition key, the
transponder code memorized in the transponder built in
! CAUTION the ignition key has to be registered with ECM. To
• As immobilizer control module consists of register the transponder code with ECM, perform
precision parts, be careful not to expose it registration of the ignition key using SUZUKI scan tool.
to excessive shock. Refer to “SUZUKI SDT Immobilizer Control System
Operator’s Manual” for detail.
• Do not disassemble immobilizer control
module. NOTE

Removal • A maximum of four transponder codes can

be registered with ECM.
1) Turn ignition switch to OFF position.
• At an early part of the registration process,
2) Remove steering column upper and lower covers.
all transponder codes of the ignition keys
3) Disconnect connector (1) from immobilizer control in use already registered with ECM are
module (2). cleared. Therefore, before starting the
4) Remove screw (3) from immobilizer control module. registration, prepare all ignition keys in
use in addition to the new ignition key(s) to
be registered with ECM.

Special tool
: SUZUKI scan tool (SUZUKI-SDT)

Procedure after ECM Replacement

After ECM is replaced with new one or used one, the
2 transponder code in the transponder built in the ignition
1
key has to be registered with ECM. To register
3
transponder code in the ignition key with ECM, perform
5) Remove immobilizer control module from steering registration of the ignition key using SUZUKI scan tool.
lock assembly. Refer to “SUZUKI SDT Immobilizer Control System
Operator’s Manual” for detail.
Installation
Reverse removal procedure for installation. NOTE
A maximum of four transponder codes can
be registered with ECM.

Special tool
: SUZUKI scan tool (SUZUKI-SDT)

Special Tools and Equipment

Special Tool
SUZUKI scan tool (SUZUKI- 6
SDT)
— 1 2
This kit includes following
4
items. 1. SUZUKI-SDT 2. 3
DLC cable 3. USB cable 4. 5
AC/DC power supply 5.
Voltage meter probe 6.
Storage case
 Communication System 8I-1

SECTION 8I

Communication System

CONTENTS
Precautions....................................................... 8I-2 CAN DTC (Lost Communication and
Precautions in Servicing Communication Bus Off) Table...................... 8I-7
CAN Communication Line .............................. 8I-2 Troubleshooting for Lost Communication ...... 8I-7
Precautions in Diagnosing Trouble ................ 8I-2 Wiring Diagram .......................................... 8I-7
General Description ......................................... 8I-3 Diagnosis Procedure.................................. 8I-7
Diagnosis Flow Selection Table
CAN Communication System Description...... 8I-3
by Equipment ............................................. 8I-7
System Description .................................... 8I-3
Troubleshooting ......................................... 8I-8
CAN Communication Signal....................... 8I-3
Troubleshooting for
CAN Communication System
Communication Bus Off ................................. 8I-9
Diagnosis General Description....................... 8I-4
Wiring Diagram .......................................... 8I-9
CAN Communication System
Diagnosis Procedure.................................. 8I-9
Transmitting and Receiving Data Table ......... 8I-4
Reference Waveform ............................... 8I-10
Schematic and Routing Diagram.................... 8I-5 Normal waveform ..................................... 8I-10
CAN Communication Examples of abnormal waveforms ........... 8I-10
System Circuit Diagram.................................. 8I-5 Troubleshooting ....................................... 8I-13
Component Location ....................................... 8I-6 Communication Check ............................. 8I-14
CAN Communication System Special Tools and Equipment....................... 8I-14
Component Location ...................................... 8I-6 Special Tool ................................................. 8I-14
Diagnostic Information and Procedures........ 8I-6
CAN Communication System
Symptom Diagnosis ....................................... 8I-6