Engine diagram SUZUKI GRAND VITARA 2002 2.G Service User Guide

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.

YH4
GRAND
VITARA
7B1-38 AUTOMATIC TRANSMISSION (4 A / T)
ª5º
ª4º
DIAGNOSTIC FLOW TABLE B-4 ªPOWERº LIGHT CIRCUIT CHECK
(ªPOWERº LIGHT COMES ON STEADILY)
WIRING DIAGRAM ± Refer to Table B-3 in this section.
TROUBLESHOOTING
STEPACTIONYESNO
1Check Power / Normal Change Switch Position.
Is switch button at Normal position?Go to Step 2.Set Power / Normal
change switch at
Normal position.
2Check Lamp Circuit for Short.
1) Turn ignition switch OFF and disconnect PCM
connectors.
2) Turn ignition switch ON.
Does ªPOWERº lamp come ON steadily?ªGr / Blº circuit
shorted to ground.Go to Step 3.
3Check Power / Normal Change Switch Circuit.
1) Check resistance between terminal E61-31
(G16/J20 engines) or E61-9 (H25 engine) of
disconnected PCM connector and body ground with
P / N change 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 Power / Normal Change Switch for Operation.
1) Remove Power / Normal change switch.
2) Check continuity between switch terminals ª4º and
ª5º under each condition below.
Normal position: No continuity
Power position: Continuity.
Is check result satisfactory?ªOr / Blº circuit
shorted to ground.Replace Power /
Normal change
switch.
Fig. for Step 1. Fig. for Step 4.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-39
G16 / J20 Engines
H25 Engine
1. PCM
2. J / B
3. Transmission range
sensor (switch)
1. PCM
2. Fuse
3. J / C
4. Transmission range
sensor (switch)
DTC P0705 (DTC NO.72) TRANSMISSION RANGE SENSOR (SWITCH) CIRCUIT
MALFUNCTION
WIRING DIAGRAM

YH4
GRAND
VITARA
G16/J20 Engines H25 Engine
G16/J20 Engines
H25 Engine
1. PCM
2. A / T input speed sensor 11 1 0
Bl / Y Bl / G16 8
Bl / Y Bl / G
7B1-42 AUTOMATIC TRANSMISSION (4 A / T)
DTC P0715 (DTC NO.76) INPUT / TURBINE SPEED SENSOR CIRCUIT MALFUNCTION
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA
Input speed sensor detected speed is lower than spec-
ification while vehicle running under all of the following
conditions:

at higher than 10 km / h (7 mph) with 1st gear in D
range for 1 sec. or more.

at higher than 20 km / h (13 mph) with 2nd gear in D
range for 2 sec. or more.

at higher than 30 km / h (20 mph) with 3rd gear in D
range for 2 sec. or more.
(2 driving cycles detection logic)
Input speed sensor and its circuit

PCM
DTC CONFIRMATION PROCEDURE
WARNING:

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

Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF, if available.
2) Clear DTC.
3) Start engine and turn O / D cut switch ON.
4) Shift select lever to D range and start vehicle.
5) Keep vehicle speed at higher than 10 km / h (7 mph) with 1st gear in D range for 2 sec. or more.
6) Increase vehicle speed and keep it at higher than 20 km / h (13 mph) with 2nd gear in D range for 2 sec. or more.
7) Increase vehicle speed and keep it at higher than 30 km / h (20 mph) with 3rd gear in D range for 2 sec. or more.
8) Stop vehicle.
9) Check DTC and / or pending DTC.

YH4
GRAND
VITARA
G16/J20 Engines H25 Engine
G16/J20 Engines
H25 Engine
1. PCM
2. A / T output speed sensor 23
22
WOr10 9
WOr
7B1-44 AUTOMATIC TRANSMISSION (4 A / T)
DTC P0720 (DTC NO.75) OUTPUT SPEED SENSOR CIRCUIT MALFUNCTION
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA

With 4WD LOW switch OFF, no output speed sensor
signal is inputted while vehicle speed sensor signal
are inputted.
or

With 4WD LOW switch OFF, no output speed sensor
signal is inputted while engine running at higher than
specified engine speed with ªDº range.
(2 driving cycles detection logic)
A / T output speed sensor or its circuit

PCM
DTC CONFIRMATION PROCEDURE
WARNING:

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

Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF, if available.
2) Clear DTC.
3) Start engine and shift transfer lever to ª2Hº or ª4Hº range.
4) Drive vehicle at 40 km / h (25 mph) or more for longer than 10 sec. (or higher than 3500 rpm engine speed with
D range for longer than 10 sec.)
5) Stop vehicle and check DTC and / or pending DTC.

YH4
GRAND
VITARA
G16/J20 Engines H25 Engine
G16/J20 Engines
H25 Engine
1. PCM
2. Shift solenoid-A
3. Shift solenoid-B
4. TCC solenoid
AUTOMATIC TRANSMISSION (4 A / T) 7B1-47
DTC P0743 (DTC NO.65 / 66) TCC (LOCK-UP) SOLENOID ELECTRICAL
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA
Voltage at terminal C51-1-8 for G16 / J20 (C51-1-2 for
H25) of PCM is high while TCC solenoid OFF is com-
manded or low while TCC solenoid ON is comman-
ded.
TCC (lock-up) solenoid valve

TCC (lock-up) solenoid valve circuit

PCM
DTC CONFIRMATION PROCEDURE
WARNING:

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

Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF, if available.
2) Clear DTC.
3) Start engine, warm it up to normal operating temperature and shift transfer lever to ª2Hº or ª4Hº range.
4) Shift selector lever in D range and keep it there for 10 seconds.
5) Increase vehicle speed to about 80 km / h (50 mph) in 4th gear and in D range.
6) Keep driving at above speed for 20 seconds.
7) Release accelerator pedal, decrease vehicle speed and stop vehicle.
8) Check DTC and / or pending DTC.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-49
DTC P0751 SHIFT SOLENOID VALVE-A (#1) PERFORMANCE OR STUCK OFF
DTC P0756 SHIFT SOLENOID VALVE-B (#2) PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA
While running in D range, gear change control from
PCM to A / T does not agree with actual A / T gear posi-
tion even though solenoid valve is electrically in good
condition.
(A / T gear position is calculated based on engine
speed signal and vehicle speed sensor signal.)
(2 driving cycles detection logic)DTC P0751:

Shift solenoid valve-A stuck or leakage.

2-3 shift valve stuck.

Valve body fluid passage clogged.

Mechanical malfunction in transmission.
(Direct clutch malfunction)
DTC P0756:

Shift solenoid valve-B stuck or leakage.

1-2 shift valve stuck.

3-4 shift valve stuck.

Valve body fluid passage clogged.

Mechanical malfunction in transmission.
(2nd brake malfunction)
DTC CONFIRMATION PROCEDURE
WARNING:

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

Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTC, pending DTC and freeze frame data in PCM memory by using scan tool and check fuel level meter
indication is 1 / 4 or more.
3) Start engine, warm it up to normal operating temperature and shift transfer lever to ª2Hº or ª4Hº range.
4) Increase vehicle speed with D range, and check that gear position changes from 1st to 2nd, 3rd and 4th in that
order as vehicle speed increases, referring to ªGear Shift Diagramº in this section.
5) Stop vehicle and check pending DTC and DTC by using scan tool.
TROUBLESHOOTING
STEPACTIONYESNO
1Was ªA / T DIAG. FLOW TABLEº performed?Go to Step 2.Go to ªA / T DIAG.
FLOW TABLEº.
2Shift solenoid valve-A or -B operation check:
1) Check shift solenoid valve-A or -B for operation
referring to ªSolenoid Valves Operation Checkº
section.
Is it in good condition?Go to Step 3.Faulty shift solenoid
valve-A or -B.
3Valve body check:
1) Check valve body and its passage referring to
ªUnit Repairº section.
Are they in good condition?Overhaul and repair
automatic transmis-
sion.Faulty valve body.

YH4
GRAND
VITARA
G16/J20 Engines H25 Engine
H25 Engine G16/J20 Engines
1. PCM
2. Shift solenoid-A
3. Shift solenoid-B
4. TCC solenoid
7B1-50 AUTOMATIC TRANSMISSION (4 A / T)
DTC P0753 (DTC NO.61 / 62) SHIFT SOLENOID-A (#1) ELECTRICAL
DTC P0758 (DTC NO.63 / 64) SHIFT SOLENOID-B (#2) ELECTRICAL
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA
DTC P0753:
Voltage detected at C51-1-2 for G16/J20 (C51-1-6 for
H25) terminal is specified voltage or lower when shift
solenoid valve-A is ON or specified voltage or higher
when it is OFF.
Shift solenoid valve-A

Shift solenoid valve-A circuit

PCM
DTC P0758:
Voltage detected at C51-1-1 terminal is specified volt-
age or lower when shift solenoid valve-B is ON or spe-
cified voltage or higher when it is OFF.
Shift solenoid valve-B

Shift solenoid valve-B circuit

PCM