ignition SUZUKI SWIFT 2000 1.G Transmission Service Repair Manual

IMMOBILIZER CONTROL SYSTEM 8G-15
DTC13 NO TRANSPONDER CODE TRANSMITTED OR COIL ANTENNA
OPENED/SHORTED
DESCRIPTION
Immobilizer Control Module energizes the coil antenna when the ignition switch is ON and reads Transponder
code from the ignition key. When Immobilizer Control Module cannot read Transponder code from the ignition
key even when the coil antenna is energized, this DTC is set.
INSPECTION
Fig. 1 for Step 1
1. Main fuse 2. Main relay 3. Immobilizer Control Module 4. Coil antenna 5. To ECM
BLK/RED
BLK/YEL
G06-4
2
3
4 5
1
Step Action Yes No
1 Check that knob shape and color for igni-
tion key are as shown below.
Knob color : Dark gray
Knob shape : the same as shown in
Fig.1.
Is it the original one?Substitute a known-good Immobilizer
Control Module and recheck.
See NOTE below.Replace ignition
key with original
one and follow
“Diagnostic Flow
Table” again.
NOTE:
After replacing with a known-good Immobilizer Control Module, register ECM/Immobilizer Control
Module code in ECM and Transponder code and ECM/Immobilizer Control Module code in Immobilizer
Control Module by performing procedure described in “PROCEDURE AFTER IMMOBILIZER CON-
TROL MODULE REPLACEMENT” in this section.

8G-16 IMMOBILIZER CONTROL SYSTEM
DTC21 ECM/IMMOBILIZER CONTROL MODULE CODE NOT MATCHED (IMMO-
BILIZER CONTROL MODULE SIDE)
DTC P1623 ECM/IMMOBILIZER CONTROL MODULE CODE NOT MATCHED
(ECM SIDE)
DTC P1620 ECM/IMMOBILIZER CONTROL MODULE CODE NOT REGISTERED
DESCRIPTION
DTC21
Immobilizer Control Module checks if ECM/Immobilizer Control Module code transmitted from ECM and that
registered in Immobilizer Control Module match when ignition switch is ON. If they do not, this DTC is set.
DTC P1623
ECM checks if ECM/Immobilizer Control Module code transmitted from Immobilizer Control Module and that
registered in ECM match when ignition switch is ON. If they do not, this DTC is set.
DTC P1620
ECM checks if code transmitted from Immobilizer Control Module and that registered in ECM match when
ignition switch is ON. If there is no ECM/Immobilizer Control Module code registered in ECM, this DTC is
set.
INSPECTION
Perform procedure described in “PROCEDURE AFTER ECM REPLACEMENT” in the section.
DTC P1622 FAULT IN ECM
DESCRIPTION
This DTC is set when an internal fault is detected in ECM.
INSPECTION
Step Action Yes No
1 1) Ignition switch OFF.
2) Disconnect connectors from ECM.
3) Check for proper connection to ECM
at all terminals.
Are they in good condition?Substitute a known-good ECM and
recheck.
See NOTE below.Repair or replace.
NOTE:
After replacing with a known-good ECM, register ECM/Immobilizer Control Module code in ECM by
performing procedure described in “PROCEDURE AFTER ECM REPLACEMENT” in this section.

IMMOBILIZER CONTROL SYSTEM 8G-17
DTC22 IGNITION SWITCH CIRCUIT OPEN/SHORT
DESCRIPTION
Immobilizer Control Module monitors ignition signal when the ignition switch is ON. This DTC is set when no
ignition signal input is detected by Immobilizer Control Module.
INSPECTION
Fig. 1 for Step 1
1. Main fuse 2. Ignition switch 3. Immobilizer Control Module
BLK/WHTBLK/WHTG06-3
12
3
Step Action Yes No
1 Check voltage between Immobilizer Con-
trol Module (1) coupler terminal G06-3
and body ground with ignition switch
turned ON. (See Fig. 1)
Is it 10 – 14V?Poor G06-3 terminal connection.
If connection is OK, substitute a
known-good Immobilizer Control Mod-
ule and recheck.
See NOTE below.“BLK/WHT” wire
open or short.
NOTE:
After replacing with a known-good Immobilizer Control Module, register ECM/Immobilizer Control
Module code in ECM and Transponder code and ECM/Immobilizer Control Module code in Immobilizer
Control Module by performing procedure described in “PROCEDURE AFTER IMMOBILIZER CON-
TROL MODULE REPLACEMENT” in this section.

8G-18 IMMOBILIZER CONTROL SYSTEM
DTC23 NO ECM/IMMOBILIZER CONTROL MODULE CODE TRANSMITTED
FROM ECM OR DLC CIRCUIT OPENED/SHORTED
DTC P1621 NO ECM/IMMOBILIZER CONTROL MODULE CODE TRANSMITTED
FROM IMMOBILIZER CONTROL MODULE OR DLC CIRCUIT OPENED/
SHORTED
DESCRIPTION
When the ignition switch is ON, Immobilizer Control Module requests ECM and ECM requests Immobilizer Con-
trol Module to transmit ECM/Immobilizer Control Module code. If ECM/Immobilizer Control Module code is not
transmitted from ECM or Immobilizer Control Module, Immobilizer Control Module sets DTC23 and ECM sets
DTC P1621.
INSPECTION
1. Immobilizer Control Module 2. ECM 3. To #9-pin in DLC
YEL G06-2G02-7YEL
YEL
1
32
Step Action Yes No
1 Check voltage between Immobilizer Con-
trol Module (1) coupler terminal G06-2
and body ground with ignition switch
turned ON.
Is it 4 – 5V?Go to Step 2.“YEL” wire short.
2 1) Disconnect ECM coupler with ignition
switch turned OFF.
2) Is there continuity between Immobi-
lizer Control Module coupler (1) termi-
nal G06-2 and serial data link terminal
(G02-7) of ECM coupler? (For posi-
tions of Data link connector terminal
of ECM coupler, refer to “WIRING
CIRCUIT” in this section.)Poor G06-2 terminal connection
(Immobilizer Control Module) or Poor
Data link connector terminal connec-
tion (ECM).
If connections are OK, substitute a
known-good ECM or Immobilizer Con-
trol Module and recheck.
See NOTE below.“YEL” wire between
Immobilizer Control
Module and ECM
open.

8G-20 IMMOBILIZER CONTROL SYSTEM
INSPECTION OF ECM, IMMOBILIZER CON-
TROL MODULE AND ITS CIRCUIT
ECM, Immobilizer Control Module and its circuit can be checked
at ECM wiring couplers and Immobilizer Control Module wiring
coupler by measuring voltage. Described here is only inspection
of Immobilizer Control Module. For inspection of ECM, refer to
“ENGINE & EMISSION CONTROL INPUT/OUTPUT TABLE” in
Section 6E1.
Voltage Check
1) Remove Immobilizer Control Module from steering lock
assembly with ignition switch OFF, referring to “REMOVAL”
of “IMMOBILIZER CONTROL MODULE” in this section.
2) Connect Immobilizer Control Module coupler to Immobilizer
Control Module.
3) Check voltage at each terminal of coupler connected.CAUTION:
Immobilizer Control Module cannot be checked by itself.
It is strictly prohibited to connect voltmeter or ohmmeter
to Immobilizer Control Module with coupler disconnected
from it.
NOTE:
As each terminal voltage is affected by the battery volt-
age, confirm that it is 11V or more when ignition switch is
ON.
1. Immobilizer Control Module
2. Immobilizer Control Module coupler
3. Body ground
TERMINAL CIRCUIT NOMAL VOLTAGE CONDITION
G06-1 Ground––
G06-2Data link connector
(Serial data terminal)4 – 5V Ignition switch ON
G06-3 Ignition signal10 – 14V Ignition switch ON
0 – 0.8V Ignition switch OFF
G06-4 Power source 10 – 14V Ignition switch ON

IMMOBILIZER CONTROL SYSTEM 8G-21
ON-VEHICLE SERVICE
PRECAUTIONS IN HANDLING IMMOBILIZER
CONTROL SYSTEM
Don’t turn ON ignition switch with ignition key for immobilizer
control system put together with another one or placed quite
close to another one. Or the system may detect abnormal
condition and prevent engine from starting.
Do not turn ON ignition switch by using ignition key with any
type of metal wound around its grip or in contact with it. Or
the system may detect abnormal condition and prevent
engine from starting.
Do not leave ignition key where high temperature is antici-
pated.High temperature will cause transponder in ignition
key to be abnormal or damaged.

8G-22 IMMOBILIZER CONTROL SYSTEM
Do not turn ON ignition switch with a radio antenna placed
near Immobilizer Control Module. Or the system may detect
abnormal condition and prevent engine from starting.
IMMOBILIZER CONTROL MODULE
REMOBAL
1) Disconnect negative (–) cable at battery.
2) Remove steering column upper and lower cover.
3) Disconnect coupler at Immobilizer Control Module.
4) Remove immobilizer control module (1) from steering lock
assembly (2) after removing instrument cluster panel.
INSTALLATION
Reverse removal procedure for installation.
NOTE:
If a screwdriver whose length is 40mm or less is used,
the immobilizer control module can be removed without
removing the instrument cluster panel.
NOTE:
After replacing Immobilizer Control Module, be sure to
register Transponder code and ECM/Immobilizer Control
Module code in Immobilizer Control Module and ECM/
Immobilizer Control Module code in ECM by performing
procedure described in “PROCEDURE AFTER IMMOBI-
LIZER CONTROL MODULE REPLACEMENT” in this sec-
tion.

IMMOBILIZER CONTROL SYSTEM 8G-23
HOW TO REGISTER IGNITION KEY
Register the ignition key with a built-in transponder in Immobilizer
Control Module by using the following procedure.
1) Prepare SUZUKI scan tool and cartridge for immobilizer con-
trol system.
2) With ignition switch OFF, connect SUZUKI scan tool to data
link connector (DLC) (1) located on underside of instrument
panel at driver’s seat side.
(A) : 09931-76011 (SUZUKI scan tool)
(B) : Immobilizer cartridge
(C) : 09931-76030 (16/14 pin DLC cable)
3) Prepare ignition key with a built-in transponder (1). And then
turn ignition switch ON by using it.
4) Number of Transponder codes for ignition key with a built-in
transponder that can be registered in Immobilizer Control
Module is limited to 4. If needed, clear all Transponder
codes for ignition key with a built-in transponder that have
been registered in Immobilizer Control Module by executing
the “CLR. TRANS COD (CLEAR TP CODE)” command in
the SELECT MODE menu by using SUZUKI scan tool. CAUTION:
When registering the ignition key including a transpon-
der into the immobilizer control module by using Suzuki
scan tool, confirm that the knob color of the ignition key
to be registered for the vehicle is dark gray. The ignition
key with wrong knob color cannot be registered.
NOTE:
For operation procedure of SUZUKI scan tool, refer to
SUZUKI scan tool operator’s manual.
1
(C)(A)
(B)
NOTE:
When “CLR. TRANS COD (CLEAR TP CODE)” command
is executed with the immobilizer indicator lamp ON, it
remains ON even after execution of that command is
over. It will start flashing when the ignition switch is
turned OFF once and then turned ON after some sec-
onds.

8G-24 IMMOBILIZER CONTROL SYSTEM
5) Using SUZUKI scan tool, register Transponder code in
Immobilizer Control Module by executing “ENT. TRANS
COD (ENT. TP CODE)” command in SELECT MODE menu.
6) Make sure that immobilizer indicator lamp lights when igni-
tion switch is turned OFF once and then ON.
7) If any other Transponder code for ignition key with a built-in
transponder needs to be registered, repeat above steps 3),
5) and 6).
PROCEDURE AFTER IMMOBILIZER CONTROL MODULE
REPLACEMENT
When Immobilizer Control Module was replaced, including when replaced because rechecking by using a
known-good Immobilizer Control Module was necessary during trouble diagnosis, register Transponder code
and ECM/Immobilizer Control Module code in Immobilizer Control Module and ECM/Immobilizer Control Module
code in ECM by performing following procedure.
1) Perform steps 1) and 2) described in “How To Register Ignition Key”.
2) Prepare ignition key with a built-in transponder. And then turn ignition switch ON by using it.
3) Using SUZUKI scan tool, clear all transponder codes registered in Immobilizer Control Module by executing
“CLR. TRANS COD (CLEAR TP CODE)” command in SELECT MODE menu.
4) Using SUZUKI scan tool, register Transponder code in Immobilizer Control Module by executing “ENT.
TRANS COD (ENT. TP CODE)” command in SELECT MODE menu.
5) Using SUZUKI scan tool, register ECM/Immobilizer Control Module code in both Immobilizer Control Module
and ECM by executing “RECORD ECU (RECORD ECM/PCM/ICM)” command in SELECT MODE menu.
6) Make sure that immobilizer indicator lamp lights when ignition switch is turned OFF once and then ON.
7) If any other Transponder code for ignition key with a built-in transponder needs to be registered, repeat
above steps 2), 4) and 6).NOTE:
Up to 4 Transponder codes for ignition key with a built-
in transponder can be registered.
It is not possible to register the same Transponder
code for ignition key with a built-in transponder as the
one already registered in Immobilizer Control Module.
CAUTION:
When registering the ignition key including a transponder into the immobilizer control module by
using Suzuki scan tool, confirm that the knob color of the ignition key to be registered for the vehicle
is dark gray. The ignition key with wrong knob color cannot be registered.
NOTE:
When “CLR. TRANS COD (CLEAR TP CODE)” command is executed with the immobilizer indicator
lamp ON, it remains ON even after execution of that command is over. It will start flashing when the
ignition switch is turned OFF once and then turned ON after some seconds.

IMMOBILIZER CONTROL SYSTEM 8G-25
PROCEDURE AFTER ECM REPLACEMENT
When ECM was replaced, including when replaced because rechecking by using a known-good ECM was nec-
essary during trouble diagnosis, register ECM/Immobilizer Control Module code in ECM by performing following
procedure.
1) Perform steps 1) and 2) described in “How To Register Ignition Key”. And then turn ignition switch ON.
2) Using SUZUKI scan tool, register ECM/Immobilizer Control Module code in ECM by executing “RECORD
ECU (RECORD ECM/lCM)” command in SELECT MODE menu.
3) Make sure that malfunction indicator lamp lights when ignition switch is turned OFF once and then ON.
SPECIAL TOOL
NOTE:
Up to 4 Transponder codes for ignition key with a built-in transponder can be registered.
It is not possible to register the same Transponder code for ignition key with a built-in transponder
as the one already registered in Immobilizer Control Module.
NOTE:
For operation procedure of SUZUKI scan tool, refer to SUZUKI scan tool operator’s manual.
09931-76011 09931-76030
Tech 1A kit
See NOTE below.Immobilizer cartridge of
version 1.1 or more16/14 pin DLC cable Mass storage cartridge of
version 1.5 or more
NOTE:
This kit includs the following items.
1. Storage case, 2. Operator’s manual, 3. Tech 1A, 4. DLC cable, 5. Test lead/probe,
6. Power source cable, 7. DLC cable adaptor, 8. Self-test adaptor