CHECK SUZUKI SWIFT 2000 1.G SF310 Service Workshop Manual

Ignition key
Transponder
code
Immobilizer
Control
Module
ECM
(1)(2)
(3)(4)
1. Coil antenna
2. Immobilizer Control
Module
3. Engine Control Module
(ECM)
4. Ignition key
8G-2 IMMOBILIZER CONTROL SYSTEM
GENERAL DESCRIPTION
The immobilizer control system designed to prevent vehicle burglar consists of following components.

Engine Control Module (ECM)

Immobilizer Control Module

Ignition key (with built-in transponder)

Coil antenna
Operation of this system is as follows.
(1) 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.
(2) Immobilizer Control Module compares the Transponder code read in (1) and that registered in Immobilizer Con-
trol Module and checks if they match.
(3) When it is confirmed that two Transponder codes match each other as described above, Immobilizer Control
Module and ECM check if ECM/Immobilizer Control Module codes registered in them respectively match.
(4) Only when it is confirmed that ECM/Immobilizer Control Module codes match, the engine starts running. If
Transponder codes in Step (2) or ECM/Immobilizer Control Module codes in Step (3) do not match, ECM will
stop operation of the injector and the ignitor (i.e., ignition of spark plug).

IMMOBILIZER CONTROL SYSTEM 8G-5
0.5TIME (sec.) Ignition switch ON
High Immobilizer
control system
is normal
Immobilizer
control system
is abnormalLow
0.5 0.5 0.5 0.5
High
Low
<Vehicle not equipped with monitor coupler>
With the ignition switch turned ON (but the engine at stop) regard-
less of the condition of the engine and emission control system,
ECM indicates whether a trouble has occurred in the immobilizer
control system or not by causing the immobilizer indicator lamp to
flash or turn ON.
Immobilizer indicator lamp is ON:
No trouble exists in the immobilizer control system.
Immobilizer indicator lamp is flashing:
ECM or Immobilizer Control Module has detected some trouble in
the immobilizer control system.
NOTE:
As soon as the ignition switch is turned ON, ECM and Immobi-
lizer Control Module diagnose if a trouble has occurred in the
immobilizer control system. While the diagnosis is being
made, the Immobilizer indicator lamp stays ON and if the diag-
nosis result is “abnormal”, it immediately changes to flashing
but if the result is “normal”, it remains ON. Diagnosis takes
about 3 seconds at maximum.
When ECM and Immobilizer Control Module detects a trouble, it
stores DTC corresponding to the exact trouble area in ECM and Im-
mobilizer Control Module memory.
DTCs stored in memory of each controller (Immobilizer Control
Module and ECM) can be read by using the procedure described
in “DIAGNOSTIC TROUBLE CODE CHECK (IMMOBILIZER CON-
TROL MODULE)” and “DIAGNOSTIC TROUBLE CODE CHECK
(ECM)” in this section.

IMMOBILIZER CONTROL SYSTEM 8G-7
[INTERMITTENT TROUBLES]
<Vehicle equipped with monitor coupler>

There are cases where output of diagnostic output terminal
and / or malfunction indicator lamp 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
unnecessarily. To prevent such accident, be sure to follow instruc-
tions given below when checking by using “Diagnostic 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, substitute a known-good
ECM and recheck.
* When trouble can not be identified but output of diagnostic out-
put terminal and / or malfunction indicator lamp 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 malfunction indicator lamp and / or output of diag-
nostic output terminal 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.
<Vehicle not equipped with monitor coupler>

There are cases where output of diagnostic output terminal and /
or Suzuki scan tool indicate a diagnostic trouble code represent-
ing a trouble which occurred only temporarily and has gone. In
such case, it may occur that good parts are replaced unnecessar-
ily. To prevent such accident, be sure to follow instructions given
below when checking by using “Diagnostic 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, substitute a known-good
ECM and recheck.
* When trouble can not be identified but output of diagnostic out-
put terminal and / or 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 and / or output of diagnostic out-
put terminal 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.

8G-8 IMMOBILIZER CONTROL SYSTEM
Fig. 1 for Step 1 Fig. 2 for Step 1 Fig. 3 for Step 2
1. Monitor coupler
2. Service wire
A: Diagnosis switch terminal
B: Ground terminal
Fig. 4 for Step 3
“CHECK ENGINE” light
0.5
ON
OFF
TIME (sec.)
DIAGNOSTIC FLOW TABLE
<Vehicle equipped with monitor coupler>
STEPACTIONYESNO
11) Make sure that diagnosis switch
terminal in monitor coupler is not
grounded by service wire. See Fig. 1.
2) Check malfunction indicator lamp
while ignition switch is ON (but without
starting engine). See Fig. 2.
Dose malfunction indicator lamp flash?Go to Step 3.
If malfunction indicator lamp
remains ON, go to Step 2.

If malfunction indicator lamp
remains OFF, go to
“MALFUNCTION INDICATOR
LAMP CHECK” in Section 6.
21) Using service wire, ground diagnosis
switch terminal in monitor coupler.
See Fig. 3.
Dose malfunction indicator lamp flash?Immobilizer control
system is in good
condition.Go to “MALFUNCTION
INDICATOR LAMP CHECK” in
Section 6.
3Dose malfunction indicator lamp flash as
Fig. 4?Go to Step 4.Go to “MALFUNCTION
INDICATOR LAMP CHECK” in
Section 6.
41) Check DTC stored in Immobilizer
Control Module referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (IMMOBILIZER CONTROL
MODULE)” in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Go to Step 5.
51) Check DTC stored in ECM referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (ECM)” in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Substitute a known-good ECM
and recheck.
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” section.

IMMOBILIZER CONTROL SYSTEM 8G-9
<Vehicle not equipped with monitor coupler>
STEPACTIONYESNO
11) Check immobilizer indicator lamp
while ignition switch is ON (but without
starting engine). See Fig. 1.
Dose immobilizer indicator lamp flash?Go to Step 3.
If immobilizer indicator lamp
remains ON, go to Step 2.

If immobilizer indicator lamp
remains OFF, go to
“IMMOBILIZER INDICATOR
LAMP CHECK” in this section.
21) Check DTC stored in ECM referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (ECM)” in this section.
Is there any DTC(s)?Go to “IMMOBILIZER
INDICATOR LAMP
CHECK” in this section.Immobilizer control system is in
good condition.
31) Check DTC stored in Immobilizer
Control Module referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (IMMOBILIZER CONTROL
MODULE)” in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Go to Step 4.
41) Check DTC stored in ECM referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (ECM)” in this section.
Is there any DTC(s) for immobilizer
control system?Go to flow table for
DTC No.Substitute a known-good ECM
and recheck.
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” section.
FIg. 1 for Step 1

8G-10 IMMOBILIZER CONTROL SYSTEM
1. Immobilizer diagnostic coupler
EXAMPLE :
COIL ANTENNA FAILURE (CODE NO.13)
Voltmeter indicator

NORMAL (No code)
Voltmeter indicatorTIME (sec.)
TIME (sec.) CODE No. 13CODE No. 13CODE No. 13
High
Low
High
Low
1. Monitor coupler
2. Service wire
A: Diagnosis switch
terminal
B: Ground terminal
DIAGNOSTIC TROUBLE CODE (DTC) CHECK
(IMMOBILIZER CONTROL MODULE)
1) Using analog type voltmeter, connect positive probe to diagnos-
tic output terminal and negative probe to ground of immobilizer
diagnostic coupler with ignition switch turned ON.
2) Read deflection of voltmeter indicator which represents DTC as
shown in example below and write it down. For details of DTC,
refer to Immobilizer Control Module side in “Diagnostic Trouble
Code Table”.
If voltmeter indicator dose not deflect, go to “Diagnostic Flow
Table A”.
NOTE:
If abnormality or malfunction lies in two or more areas, volt-
meter indicates applicable codes three times each.
DIAGNOSTIC TROUBLE CODE (DTC) CHECK (ECM)
[Not using SUZUKI scan tool] (Vehicle equipped with
monitor coupler)
1) Using service wire, ground diagnostic switch terminal in monitor
coupler.
2) Read DTC from flashing pattern of malfunction indicator lamp as
shown in example below and write it down. For details of DTC,
refer to ECM side in “Diagnostic Trouble Code Table”.
If lamp remains ON, go to “Malfunction Indicator Lamp Check”
in Section 6.
NOTE:
If abnormality or malfunction lies in two or more areas, mal-
function indicator lamp indicates applicable codes three
times each.
And flashing of these codes is repeated as long as diagno-
sis terminal is grounded and ignition switch is held at ON
position.

IMMOBILIZER CONTROL SYSTEM 8G-11
EXAMPLE: When serial data link wire is defective (Code No.83)
ON
OFFMalfunction
indicator lamp
Code No.83 Code No.83 Code No.83
Time (sec.)
1. Data link connector (DLC)
3) After completing the check, turn ignition switch OFF and discon-
nect service wire from monitor coupler.
[Using SUZUKI scan tool] (Vehicle not equipped with
monitor coupler)
1) Turn ignition switch OFF.
2) After setting cartridge to Suzuki scan tool, connect it to data link
connector (DLC) located on underside of instrument panel at
driver’s seat side.
Special Tool
(A): 09931-76011 (Suzuki scan tool)
(B): Mass storage cartridge
(C): 09931-76030 (16 / 14 pin DLC adapter)
3) Turn ignition switch ON.
4) Read DTC stored in ECM according to instructions displayed on
Suzuki scan tool and print it or write it down. Refer to Suzuki scan
tool operator’s manual for further details.
NOTE:

When reading DTC stored in ECM using Suzuki scan tool,
select “ECM” from the applications menu and “SUZUKI
mode” from the communication mode menu displayed on
Suzuki scan tool.

If ECM detects a trouble in both electric fuel injection sys-
tem and immobilizer control system, Suzuki scan tool in-
dicates trouble codes of both systems using Suzuki mode
of ECM application.
If communication between Suzuki scan tool and ECM is not pos-
sible, check if Suzuki scan tool is communicable by connecting
it to ECM in another vehicle. If communication is possible in this
case, Suzuki scan tool is in good condition. Then check data link
connector and serial data line (circuit) in the vehicle with which
communication was not possible.
5) After completing the check, turn ignition switch OFF and discon-
nect Suzuki scan tool from data link connector (DLC).

3 To ECM
A5 A7A31. Main fuse
2. Main relay
3. Immobilizer Control Module
4. Immobilizer diagnostic
coupler
4-1. Diagnostic output terminal
4-2. Ground terminalIn cabin
Check voltage between A3 terminal
and body ground with ignition switch
turned ON.
Is it 10 – 14 V?“ f ” wire open.
1. Connect voltmeter between A5
terminal and body ground.
2. Does voltmeter indicator deflect?
“ n ” wire of ground terminal for im-
mobilizer diagnostic coupler open.
1. Connect voltmeter between diag-
nostic output terminal of immobi-
lizer diagnostic coupler and body
ground.
2. Is it possible to read DTC by
checking deflection of voltmeter
indicator?

Poor A3, A5 or A7 connection.

“ h ” wire of A7 terminal open.

“ m ” wire between A5 terminal and
diagnostic output terminal of im-
mobilizer diagnostic coupler short.
If wire and connections are OK, sub-
stitute a known-good ICM and re-
check.
NOTE:
After replacing with a known-
good ICM, register ECM/ICM code
in ECM and TP code and ECM/ICM
code in ICM by performing proce-
dure described in “Procedure af-
ter ICM Replacement” section.
“ m ” wire between A5 terminal and
diagnostic output terminal of immobi-
lizer diagnostic coupler open. NO
YES
NO
NO YES
YES
IMMOBILIZER CONTROL SYSTEM 8G-13
A-1 CODE (DTC) IS NOT OUTPUTTED FROM DIAGNOSTIC OUTPUT TERMINAL OF
IMMOBILIZER DIAGNOSTIC COUPLER

8G-14 IMMOBILIZER CONTROL SYSTEM
1. Main fuse
2. Main relay
3. ECM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler)For G10 engine
For G13B engine
For G10 engine For G13B engine
A-2 IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP DOSE NOT LIGHT AT IGNITION SWITCH ON)
STEPACTIONYESNO
11) Turn ignition switch ON.
Do other indicator / warning lights in
combination meter come ON?Go to Step 2.“IG” fuse blown, main fuse blown,
ignition switch malfunction,
“(d)” circuit between “IG” fuse
and combination meter or poor
coupler connection at
combination meter.
21) Turn ignition switch OFF and
disconnect connectors from ECM.
2) Check for proper connection to ECM
at terminal C02-18 for G10 engine or
C01-28 for G13B engine.
3) If OK, then using service wire, ground
terminal C02-18 for G10 engine or
C01-28 for G13B engine in connector
disconnected.
Does immobilizer indicator lamp turn on
at ignition switch ON?Substitute a known-
good ECM and
recheck.Bulb burned out or “(P)” wire
circuit open.

1. Main fuse
2. Main relay
3. ECM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler)For G10 engine
For G13B engine
For G10 engine For G13B engine
IMMOBILIZER CONTROL SYSTEM 8G-15
A-3 IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP REMAINS ON AFTER ENGINE STARTS)
STEPACTIONYESNO
11) With ignition switch OFF, disconnect
couplers from ECM.
Does immobilizer indicator lamp turn ON
at ignition switch ON?“(p)” wire shorted to
ground circuit.Substitute a known-good ECM
and recheck.