ignition switch SUZUKI GRAND VITARA 2005 2.G Service Repair Manual

YH4
GRAND
VITARA
1. Malfunction indicator lamp (MIL)
2. Scan tool
3. DLC
7B1-18 AUTOMATIC TRANSMISSION (4 A / T)
[For Vehicle without Monitor Connector]
ON-BOARD DIAGNOSTIC SYSTEM
For automatic transmission control system, PCM (ECM) has follow-
ing functions. Refer to Section 6 / 6-1 for details.

When the ignition switch is turned ON with the engine at a stop,
malfunction indicator lamp (MIL) turns ON to check the bulb of the
MIL.

When PCM detects a malfunction in A / T control system (and / or
a malfunction which gives an adverse effect to vehicle emission)
while the engine is running, it makes the malfunction indicator
lamp in the meter cluster of the instrument panel turn ON and
stores the malfunction area in its memory. (If it detects that contin-
uously 3 driving cycles are normal after detecting a malfunction,
however, it makes MIL turn OFF although DTC stored in its
memory will remain.)

It is possible to communicate through DLC by using not only SU-
ZUKI scan tool (Tech-1) but also generic scan tool. (Diagnostic in-
formation can be accessed by using a scan tool.)
2 Driving Cycle Detection Logic
Refer to section 6 / 6-1 for details.
Pending DTC
Refer to section 6 / 6-1 for details.
Freeze Frame Data
Refer to section 6 / 6-1 for details.

YH4
GRAND
VITARA
1. Malfunction indicator lamp (MIL)
2. Scan tool
3. DLC
4. Monitor connector
5. Diagnosis switch terminal
6. Ground terminal MIL
OFF
Time (sec.)
AUTOMATIC TRANSMISSION (4 A / T) 7B1-19
[For Vehicle with Monitor Connector]
ON-BOARD DIAGNOSTIC SYSTEM
For automatic transmission control system, PCM (ECM) has follow-
ing functions. Refer to Section 6 / 6-1 for details.

When the ignition switch is turned ON with the engine at a stop,
malfunction indicator lamp (MIL) turns ON to check the bulb of the
MIL.

When PCM detects a trouble in electronic shift control system, it
stores its trouble code in back-up memory in itself. (The memory
is kept as it is even if the trouble was only temporary and disap-
peared immediately. And it is not erased unless the power to PCM
is shut off for 30 seconds or longer.)

It is possible to communicate through DLC by using not only SU-
ZUKI scan tool (Tech-1) but also generic scan tool. (Diagnostic in-
formation can be accessed by using a scan tool.)

It is also possible to communicate by not using scan tool. PCM
indicates trouble area in memory by means of flashing of malfunc-
tion indicator lamp at the time of inspection (i.e. when diagnosis
switch terminal is grounded and ignition switch is turned ON).

YH4
GRAND
VITARA
7B1-24 AUTOMATIC TRANSMISSION (4 A / T)
MALFUNCTION INDICATOR LAMP (MIL) CHECK
Refer to the same item in Section 6 / 6-1 for checking procedure.
ªO / D OFFº LAMP CHECK
1) Check that O / D cut switch button is at OFF position (pushed).
2) Turn ignition switch ON.
3) Check that ªO / D OFFº lamp lights for about 2 ± 4 sec. and then goes OFF.
If anything faulty is found, advance ªDiagnostic flow table B-1 or B-2º O / D OFF ªLAMP CIRCUIT CHECKº.
ªPOWERº LAMP CHECK
1) Check that Power / Normal change switch button is at Normal position.
2) Turn ignition switch ON.
3) Check that ªPowerº Lamp light for 2 ± 4 sec. and then goes OFF.
If anything faulty is found, advance ªDiagnostic flow table B-3 or B-4 ªPOWERº LAMP CIRCUIT CHECK 2.
DIAGNOSTIC TROUBLE CODE (DTC) CHECK
Refer to the same item in Section 6 / 6-1 for checking procedure.
DIAGNOSTIC TROUBLE CODE (DTC) CLEARANCE
Refer to the same item in Section 6 / 6-1 for clearance procedure.
DIAGNOSTIC TROUBLE CODE (DTC) TABLE (A / T RELATED CODE)
DTC NO.MIL
Using
scan toolNot using
scan toolDETECTED ITEMDETECTING CONDITION
Vehicle
without
monitor
connectorVehicle
with
monitor
connector
±12±No trouble.±±
P070572Transmission range
sensor circuit
Multiple signals inputted simulta-
neously or no signal inputted while
2 driving
cycles
Not
applicablesensor circuit
malfunction
neously or no signal in utted while
running at 60 km / h or more.
cyclesa licable
P071576Input / Turbine speed
sensor circuit
malfunctionInput shaft revolution speed is lower
than specified value while
vehicle is running with ªDº range and
specified engine speed or higher.2 driving
cyclesNot
applicable
P072075Output speed sensor
circuit malfunctionOutput speed sensor signal not
inputted while VSS signal being
inputted.2 driving
cyclesNot
applicable
*1
P0741
Not
applicableTCC (lock-up) solenoid
performance or stack
offActual TCC operation does not
agree with ON / OFF control from
PCM to TCC.2 driving
cyclesNot
applicable
P074365
66TCC (lock-up)
solenoid electricalMonitor signal OFF is detected
When TCC control solenoid is ON or
monitor signal ON is detected when
it is OFF.1 driving
cycleNot
applicable
*1
P0751
Not
applicableShift solenoid A (#1)
performance or stuck
offGear change control from PCM to
A / T does not agree with actual gear
position of A / T.2 driving
cyclesNot
applicable
P075361
62Shift solenoid A (#1)
electricalMonitor signal OFF is detected
when shift solenoid A (#1) is ON or
monitor signal ON is detected when
it is OFF.1 driving
cycleNot
applicable

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-31
Brake pedal Released Depressed
Voltage 0 VBattery
voltage
DIAGNOSTIC FLOW TABLE A-1 (NO TCC LOCK-UP OCCURS)
SYSTEM DESCRIPTION
PCM turns TCC solenoid OFF under any of the following conditions.

Brake pedal switch: ON

4WD LOW switch: ON

Cruise control module: TCC OFF command signal is output (if equipped).

ECT: ECT < 30C (86F)
TROUBLESHOOTING
WARNING:

When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and very careful during testing to avoid occurrence of an accident.

Road test should be carried out with 2 person, a driver and tester, on a level road.
STEPACTIONYESNO
1Was ªAUTOMATIC TRANSMISSION
DIAGNOSTIC FLOW TABLEº performed?Go to Step 2.Go to ªAUTOMATIC
TRANSMISSION
DIAGNOSTIC FLOW
TABLEº.
2ECT check:
(1) Warm up engine to normal operating
temperature.
(2) Check ECT using scan tool.
Is ECT more than 30C (86F)?Go to Step 3.Faulty ECT sensor, its
circuit or engine cooling
system.
If OK, substitute a known-
good PCM and recheck.
3Perform running test under the following
conditions and check voltage between
C51-1-8 (G16 / J20 engines) or C51-1-2 (H25
engine) terminal of PCM coupler and ground.

Normal mode in ªDº range.

Transfer ª2Hº position.

Cruise control is not operated (if equipped).

Brake pedal released.

Drive vehicle with TCC ON condition
referring to ªTCC lock-up diagramº in
this section.
Is it battery voltage?Faulty TCC solenoid
valve, its circuit or
transmission.Go to Step 4.
4Is vehicle equipped with H25 engine?Go to Step 5.Go to Step 6.
5Brake switch signal inspection:
(1) With ignition switch ON, check voltage
between E61-31 terminal of PCM coupler
terminal and ground.
Is the result as specified?Go to Step 6.Faulty brake pedal switch
or its circuit.
If OK, substitute a known-
good PCM and recheck.

YH4
GRAND
VITARA
7B1-32 AUTOMATIC TRANSMISSION (4 A / T)
Transfer gear
positionª4Lº or ªNº ª4Hº or ª2Hº
Voltage 0 VBattery
voltage
STEPACTIONYESNO
6ª4WD LOWº switch signal inspection:
(1) With ignition switch ON, check voltage
between C51-1-26 (G16 / J20 engines) or
C51-1-5 (H25 engine) terminal of PCM
coupler and ground.
Is the result as specified?Go to Step 7.Faulty ª4WD LOWº
switch or its circuit.
If OK, substitute a known-
good PCM and recheck.
7Is vehicle equipped with cruise control
system?Go to Step 8.Substitute a known-good
PCM and recheck.
8Cruise control signal inspection:
(1) With ignition switch ON, check voltage
between E61-35 (G16 / J20 engines) or
E61-3 (H25 engine) terminal of PCM
coupler and ground.
Is it battery voltage?Substitute a known-good
PCM and recheck.Faulty cruise control
module or its circuit.
If OK, substitute a known-
good PCM and recheck.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-33
O / D cut
switchOFF ON
VoltageBattery
voltage0 V
DIAGNOSTIC FLOW TABLE A-2 (NO GEAR SHIFT TO O / D)
SYSTEM DESCRIPTION
PCM does not shift to O / D gear under any of the following conditions.

O / D cut switch: ON

4WD LOW switch: ON

Cruise control module: O / D OFF command signal is output (if equipped).

ECT: ECT < 30C (86F)
TROUBLESHOOTING
WARNING:

When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and very careful during testing to avoid occurrence of an accident.

Road test should be carried out with 2 person, a driver and tester, on a level road.
STEPACTIONYESNO
1Was ªAUTOMATIC TRANSMISSION
DIAGNOSTIC FLOW TABLEº performed?Go to Step 2.Go to ªAUTOMATIC
TRANSMISSION
DIAGNOSTIC FLOW
TABLEº.
2ECT check:
(1) Warm up engine to normal operating
temperature.
(2) Check ECT using scan tool.
Is ECT more than 30C (86F)?Go to Step 3.Faulty ECT sensor,
its circuit or engine
cooling system.
If OK, substitute a known-
good PCM and recheck.
3Perform running test under the following
conditions and check voltage between
C51-1-2 (G16 / J20 engines) or C51-1-6 (H25
engine) terminal of PCM coupler and ground,
C51-1-1 terminal of PCM coupler and ground.

O / D cut switch OFF (ªO / D OFFº lamp OFF).

Normal mode in ªDº range.

Transfer ª2Hº position.

Cruise control is not operated (if equipped).

Drive vehicle with 4th gear condition
referring to ªGear shift diagramº in this
section.
Is each voltage about 0 V?Faulty shift solenoid
valve, its circuit or
transmission.ªGº wire or ªG / Rº wire
shorted to power circuit.
If OK, go to Step 4.
4O / D cut switch signal inspection:
(1) With ignition switch ON, check voltage
between E61-33 (G16 / J20 engines) or
E61-14 (H25 engine) terminal of PCM
coupler and ground.
Is the result as specified?Go to Step 5.Faulty O / D cut switch or
its circuit.
If OK, substitute a known-
good PCM and recheck.

YH4
GRAND
VITARA
7B1-34 AUTOMATIC TRANSMISSION (4 A / T)
Transfer gear
positionª4Lº or ªNº ª4Hº or ª2Hº
Voltage 0 VBattery
voltage
STEPACTIONYESNO
54WD LOW switch signal inspection:
(1) With ignition switch ON, check voltage
between C51-1-26 (G16 / J20 engines) or
C51-1-5 (H25 engine) terminal of PCM
coupler and ground.
Is the result as specified?Go to Step 6.Faulty 4WD LOW switch
or its circuit.
If OK, substitute a known-
good PCM and recheck.
6Is vehicle equipped with cruise control
system?Go to Step 7.Substitute a known-good
PCM and recheck.
7Cruise control signal inspection:
(1) With ignition switch ON, check voltage
between E61-35 (G16 / J20 engines) or
E61-3 (H25 engine) terminal of PCM
coupler and ground.
Is it battery voltage?Substitute a known-good
PCM and recheck.Faulty cruise control
module or its circuit.
If OK, substitute a known-
good PCM and recheck.

YH4
GRAND
VITARA
G16 / J20 Engines
H25 Engine
1. PCM
2. J / B
3. O / D cut switch
4. P / N change switch
5. J / C
1. PCM
2. Fuse
3. O / D cut switch
4. P / N change switch
5. J / C
6. J / C
AUTOMATIC TRANSMISSION (4 A / T) 7B1-35
DIAGNOSTIC FLOW TABLE B-1 ªO / D OFFº LIGHT CIRCUIT CHECK
(ªO / D OFFº LIGHT DOESN'T LIGHT AT IGNITION SWITCH ON BUT
ENGINE STARTS UP)
WIRING DIAGRAM
TROUBLESHOOTING
STEPACTIONYESNO
1ªO / D OFFº light circuit check:
(1) With ignition switch OFF, disconnect
couplers from PCM.
(2) Using service wire, connect E61-20
(G16 / J20 engines) or E61-7 (H25 engine)
terminal of disconnected PCM coupler and
ground.
Does ªO / D OFFº light turn ON at ignition
switch ON?Poor E61-20 (G16 / J20
engines) or E61-7 (H25
engine) terminal
connection.
If OK, substitute a known-
good PCM and recheck.Bulb burned out or faulty
ªW / Bº, ªB / Wº wire.

YH4
GRAND
VITARA
7B1-36 AUTOMATIC TRANSMISSION (4 A / T)
Switch ON
positionSwitch OFF
positionSwitch ON
position
Switch OFF
position
DIAGNOSTIC FLOW TABLE B-2 ªO / D OFFº LIGHT CIRCUIT CHECK
(ªO / D OFFº LIGHT COMES ON STEADILY)
WIRING DIAGRAM ± Refer to Table B-1 in this section.
TROUBLESHOOTING
STEPACTIONYESNO
1Check O / D cut Switch Position.
Is O / D cut switch turned OFF (Is switch button at OFF
position)?Go to Step 2.Turn O / D cut switch
OFF.
2Check Lamp Circuit for Short.
1) Turn ignition switch OFF and disconnect PCM
connectors.
2) Turn ignition switch ON.
Does ªO / D OFFº lamp come ON steadily?ªW / Bº circuit shorted
to ground.Go to Step 3.
3Check O / D cut Switch Circuit.
1) Check resistance between terminal E61-33
(G16 / J20 engines) or E61-14 (H25 engine) of
disconnected PCM connector and body ground with
O / D cut switch OFF.
Is continuity indicated?Go to Step 4.Check PCM ground
circuit for open.
If ground circuit is
OK, substitute a
known-good PCM
and recheck.
4Check O / D cut Switch for Operation.
1) Remove console box.
2) Disconnect O / D cut switch connector.
3) Check continuity between switch terminals under
each condition below.
Switch OFF position: No continuity
Switch ON position: Continuity
Is check result satisfactory?ªY / Rº circuit shorted
to ground.Replace O / D cut
switch.
Fig. for Step 1. Fig. for Step 4.

YH4
GRAND
VITARA
G16 / J20 Engines
H25 Engine
1. PCM
2. J / B
3. O / D cut switch
4. P / N change switch
5. J / C
1. PCM
2. Fuse
3. O / D cut switch
4. P / N change switch
5. J / C
6. J / C
AUTOMATIC TRANSMISSION (4 A / T) 7B1-37
DIAGNOSTIC FLOW TABLE B-3 ªPOWERº LIGHT CIRCUIT CHECK
(ªPOWERº LIGHT DOESN'T LIGHT AT IGNITION SWITCH ON BUT
ENGINE STARTS UP)
WIRING DIAGRAM
TROUBLESHOOTING
STEPACTIONYESNO
1ªPOWERº light circuit check:
(1) With ignition switch OFF, disconnect
couplers from PCM.
(2) Using service wire, connect E61-21 (G16 /
J20 engines) or E61-10 (H25 engine)
terminal of disconnected PCM coupler and
ground.
Does ªPOWERº light turn ON at ignition switch
ON?Poor E61-21 (G16 / J20
engines) or E61-10 (H25
engine) terminal
connection.
If OK, substitute a known-
good PCM and recheck.Bulb burned out or faulty
ªGr / Blº, ªB / Wº wire.