2000 SUZUKI SWIFT key

8G-2 IMMOBILIZER CONTROL SYSTEM
PROCEDURE AFTER IMMOBILIZER CONTROL
MODULE REPLACEMENT ........................... 8G-24
PROCEDURE AFTER ECM
REPLACEMENT............................................ 8G-25SPECIAL TOOL ............................................ 8G-25

GENERAL DESCRIPTION
The immobilizer control system designed to prevent vehicle burglar consists of following components.
Engine control module (ECM)
Immobilizer control module (1) with coil antenna
Ignition key (2) with built-in transponder
Operation of this system is as follows.
i) Each ignition key has its own code (Transponder code) stored in memory. When the ignition switch is
turned ON, Immobilizer Control Module tries to read the Transponder code through the coil antenna
installed to the steering lock assembly.
ii) Immobilizer Control Module compares the Transponder code read in Step (i) and that registered in Immo-
bilizer Control Module and checks if they match.
iii) When it is confirmed that two Transponder codes match each other as described above, Immobilizer Con-
trol Module and ECM check if ECM/Immobilizer Control Module codes registered in them respectively
match.
iv) Only when it is confirmed that ECM/Immobilizer Control Module codes match, the engine starts running. If
Transponder codes in Step (ii) or ECM/Immobilizer Control Module codes in Step (iii) do not match, ECM
will stop operation of the injector and ignition of spark plug.
3. Data link connector (DLC)
4. Immobilizer indicator lamp
5. ECM

IMMOBILIZER CONTROL SYSTEM 8G-5
DIAGNOSIS
PRECAUTIONS IN DIAGNOSING TROUBLES
PRECAUTIONS IN IDENTIFYING DIAGNOSTIC TROUBLE CODE
ECM
Before identifying diagnostic trouble code indicated through Suzuki scan tool, don't disconnect couplers from
ECM, battery cable from battery, ECM ground wire harness from engine.
Such disconnection will clear trouble codes for engine and emission control system and immobilizer control
system stored in memory of ECM.
Take a note of diagnostic trouble code indicated first.
IMMOBILIZER CONTROL MODULE
Take a note of diagnostic trouble code indicated first.
INTERMITTENT TROUBLES
There is case where Suzuki scan tool indicate a diagnostic trouble code representing a trouble which
occurred only temporarily and has gone. In such case, it may occur that good parts are replaced unneces-
sarily. To prevent such accident, be sure to follow instructions given below when checking by using “Diag-
nostic Flow Table”.
–When trouble can be identified, it is not an intermittent one :
Check coil antenna, ignition key, wires and each connection and if they are all in good condition, substi-
tute a known-good ECM and recheck.
–When trouble can not be identified but Suzuki scan tool indicate a trouble code :
Diagnose trouble by using that code No. and if ignition key, coil antenna, wires and each connection are
all in good condition, turn OFF ignition switch and then ON.
Then check what Suzuki scan tool indicate.Only when they indicate trouble code again, substitute a known-
good ECM or Immobilizer Control Module and check again.
If they indicate not trouble code but normal code, it means that an intermittent trouble did occur and has gone. In
this case, check wires and connections carefully again.

IMMOBILIZER CONTROL SYSTEM 8G-9
DIAGNOSTIC TROUBLE CODE TABLE
IMMOBILIZER CONTROL MODULE
ECM
DTC
(indicated on Suzuki scan tool)DIAGNOSTIC AREA DIAGNOSIS
NO DTC Normal (No code)This code appears when none of
the other codes are identified.
11
Transponder code
Diagnose trouble according to
“Diagnostic Flow Table” corre-
sponding to each code No. 31
32
12 Immobilizer Control Module
13 Coil antenna or ignition key with
built-in transponder
21 ECM/Immobilizer Control Module
code
22 Ignition switch circuit
23 Serial data link circuit
DTC
(indicated on Suzuki scan tool)DIAGNOSTIC AREA DIAGNOSIS
NO DTC NormalThis code appears when it is con-
firmed that none of other trouble
codes is set for immobilizer control
system or engine and emission
control system.
P1623 ECM/Immobilizer Control Module
codeDiagnose trouble according to
“DIAGNOSTIC FLOW TABLE” cor-
responding to each code No. P1620
P1622 ECM
P1621 Serial data link wire

IMMOBILIZER CONTROL SYSTEM 8G-13
Fig. 1 for Step 1
Fig. 2 for Step 2
DTC11/32 TRANSPONDER CODE NOT MATCHED
DESCRIPTION
Immobilizer Control Module checks if Transponder code transmitted from ignition key and that registered in
Immobilizer Control Module match when ignition switch is ON. If they do not, DTC 11 and/or 32 are set.
INSPECTION
Register ignition key with built-in transponder by using SUZUKI scan tool and performing following steps.
1) Register Transponder code in Immobilizer Control Module by performing procedure described in “How To
Register Ignition Key”.
2) Turn ignition switch OFF, then turn it ON and check that DTC11 and/or 32 are not set.

8G-14 IMMOBILIZER CONTROL SYSTEM
DTC31 TRANSPONDER CODE NOT REGISTERED
DESCRIPTION
Immobilizer Control Module checks if Transponder code transmitted from ignition key and that registered in
Immobilizer Control Module match when ignition switch is ON. If there is no Transponder code registered in
Immobilizer Control Module, this DTC is set.
INSPECTION
Register ignition key with built-in transponder by using SUZUKI scan tool and performing following steps.
1) Register Transponder code in Immobilizer Control Module by performing procedure described in “How To
Register Ignition Key”.
2) Turn ignition switch OFF, then turn it ON and check that DTC31 is not set.
DTC12 FAULT IN IMMOBILIZER CONTROL MODULE
DESCRIPTION
This DTC is set when an internal fault is detected in Immobilizer Control Module.
INSPECTION
Step Action Yes No
1 1) Ignition switch OFF.
2) Disconnect connectors from Immobilizer
Control Module.
3) Check for proper connection to Immobilizer
Control Module at all terminals.
Are they in good condition?Substitute a known-good
Immobilizer Control Module
and recheck.
See NOTE below.Repair or replace.
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.

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.

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.

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.