2000 SUZUKI SWIFT relay

7B-6 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
[G13 Engine Model]
1. PCM
2. Camshaft position (CMP) sensor
3. Throttle position (TP) sensor
4. Engine coolant temperature (ECT) sensor
5. Transmission range sensor (shift switch)
6. Output shaft speed sensor (A / T VSS)7. Malfunction indicator lamp (MIL)
8. Data link connector (DLC)
9. Shift solenoid-A
(No.1, Direct clutch solenoid valve)
10. Shift solenoid-B
(No.2, 2nd brake solenoid valve)11. Ignition switch
12. Main relay
13. Inhibitor switch
14. To starter
15. Terminal arrangement of PCM coupler
(Viewed from harness side)

7B-12 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
PRECAUTION IN DIAGNOSING TROUBLE

Don’t disconnect couplers from PCM, battery cable from battery, PMC ground wire harness from engine or main
fuse before checking the diagnosis information (DTC, freeze frame data, etc.) stored in PCM memory.
Such disconnection will clear memorized information in PCM.

Using SUZUKI scan tool (Tech-1) the diagnostic information stored in PCM memory can be checked and cleared
as well. Before its use, be sure to read Operator’s (instruction) Manual supplied with it carefully to have good
understanding of its functions and usage.

Priorities for diagnosing troubles
If two or more diagnostic trouble codes (DTCs) are stored, proceed to flow table (chart) of DTC which was de-
tected earliest in order and follow instruction in that table (chart).
If no instructions are given, troubleshoot diagnostic trouble codes according to the following priorities.
1. Diagnostic trouble codes (DTCs) other than DTC P0171 / P0172 (Fuel system too lean / too rich), DTC
P0300 / P0301 / P0302 / P0303 / P0304 (Misfire detected) and DTC P0400 (EGR flow malfunction)
2. DTC P0171 / P0172 (Fuel system too lean / too rich) and DTC P0400 (EGR flow malfunction)
3. DTC P0300 / P0301 / P0302 / P0303 / P0304 (Misfire detected)

Be sure to read “PRECAUTION FOR ELECTRICAL CIRCUIT SERVICE” in Section 0A before inspection and
observe what is written there.

PCM replacement
When substituting a known-good PCM, check for following conditions.
Neglecting this check may result in damage to good PCM.
–All relays and actuators have resistance of specified value.
–MAF sensor, TP sensor and fuel tank pressure sensor (if equipped) are in good condition. Also, the power cir-
cuit of these sensors is not shorted to the ground.

IMMOBILIZER CONTROL SYSTEM 8G-3
Vehicle without monitor coupler
1. Coil antenna
2. Immobilizer Control Module
3-1. ECM (G10 engine)
3-2. ECM (G13 engine without monitor coupler)
3-3. ECM (G13 engine with monitor coupler)
4. Immobilizer diagnostic coupler
4-1. Diagnostic output terminal
4-2. Ground terminal
5. Malfunction indicator lamp
6. Main relay
7. Ignition switch
8. Fuse
9. Main fuse
10. To #9-pin in Data link connector
11. To #7-pin in Data link connector
12. To ABS control module
13. Immobilizer indicator lamp
(Vehicle not equipped with monitor coupler)
14. Monitor coupler (Vehicle not equipped
with immobilizer indicator lamp)
Vehicle with monitor couplerG10 engineG13 engine
G13B engine
n
W/R
Bl / B
W/Bl
B/W
V/G
W/Bl
B/W
B
V/W
V/W
P/B
P/Bl
P/G
B
B
B/Bl
B/R
–
R/G
–W/R
Gr
R/B
B/W
V/G
W/Bl
B/W
B
Y/B
V/W
P/B
P/Bl
P/G
B
B
B/Or
B/Or
–
R/G
–W/R
G/B
W/Bl
B/W
–
W/Bl
B/W
B
V/W
V/W
P/B
P/Bl
P/G
B
B/Bl
B/Bl
B/G
V
–
V/Y WIRE
SYMBOL
G10 engineG13 engine
without monitor
couplerG13 engine
with monitor
coupler WIRE COLORabcdefghijklmnopqrst

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.