1999 SUZUKI GRAND VITARA J20 engine

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
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

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-51
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) Shift selector lever in D range and keep it for 10 seconds.
5) Drive vehicle about 30 km / h (20 mph) with 2nd gear in D range for 10 seconds.
6) Increase vehicle speed to about 80 km / h (50 mph) with 4th gear in D range and keep it for 10 seconds.
7) Release accelerator pedal, decrease vehicle speed and stop vehicle.
8) Check DTC and / or pending DTC.
TROUBLESHOOTING (DTC P0753 / P0758)
STEPACTIONYESNO
1Was ªA / T DIAG. FLOW TABLEº performed?Go to Step 2.Go to ªA / T DIAG.
FLOW TABLEº.
2Is the vehicle equipped with monitor connector?Go to Step 3.Go to Step 4.
3Is DTC NO.61 or 63?Go to Step 4.Go to Step 6.
4Check Shift Solenoid Circuit for Open or Short.
1) Turn ignition switch OFF and disconnect PCM
connectors.
2) Check for proper connection to PCM at terminals
C51-1-2 for G16 / J20 (C51-1-6 for H25) or C51-1-1.
3) If OK, then measure resistance between terminal
C51-1-2 for G16 / J20 (C51-1-6 for H25) or C51-1-1
of disconnected PCM connector and ground.
Is it 11 ± 15
at 20C, 68F?Go to Step 5.ªGº or ªG / Rº circuit
open or shorted to
ground.
If wire and
connections are OK,
replace malfunction
shift solenoid.
5Check Shift Solenoid Circuit for Short.
1) Turn ignition switch ON.
2) Measure voltage between terminal C51-1-2 for
G16 / J20 (C51-1-6 for H25) or C51-1-1 of
disconnected PCM connector and ground.
Is it about 0 V?Intermittent trouble or
faulty PCM.
Check for
ªIntermittent and
Poor Connectionº in
Section 0A.ªGº or ªG / Rº circuit
shorted to power
circuit.
6Check Shift Solenoid Circuit for Short.
1) Turn ignition switch OFF and disconnect PCM
connectors.
2) Check for proper connection to PCM at terminals
C51-1-2 for G16 / J20 (C51-1-6 for H25) or C51-1-1.
3) If OK, then measure resistance between terminal
C51-1-2 for G16/J20 (C51-1-6 for H25) or C51-1-1
of disconnected PCM connector and ground.
Is it 11 ± 15
at 20C, 68F?Intermittent trouble or
faulty PCM.
Check for
ªIntermittent and
Poor Connectionº in
Section 0A.ªGº or ªG / Rº circuit
shorted to ground.

YH4
GRAND
VITARA
G16 / J20 Engines
H25 Engine
1. PCM
2. 4WD low switch
3. J / C
7B1-52 AUTOMATIC TRANSMISSION (4 A / T)
DTC P1875 4WD LOW SWITCH CIRCUIT MALFUNCTION (if equipped)
WIRING DIAGRAM
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA
While driving at higher than specified vehicle speed
and with more than specified throttle valve opening,
the following conditions are satisfied for specified time.

Vehicle speed sensed by vehicle speed sensor is
more than 10 km / h higher than that sensed by A / T
output speed sensor.
(2 driving cycles detection logic)
4WD LOW switch 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.
2) Clear DTC, pending DTC and freeze frame data in PCM memory by using scan tool.
3) Start engine.
4) Increase vehicle speed to about 30 km/h (19 mph) or more in D range and is in 2H position.
5) Keep driving at above vehicle speed for 30 seconds.
6) Stop vehicle and shift transfer lever to 4L position with A/T selector lever is in P range
7) Increase vehicle speed to about 25 km/h (15 mph) or more in D range and is in 4L position.
8) Keep driving at above vehicle speed for 30 seconds.
9) Stop vehicle and check pending DTC and DTC by using scan tool.

YH4
GRAND
VITARA
1. Fluid pressure check hole
2. Oil pan
1. Oil pan
2. Exhaust pipe
7B1-54 AUTOMATIC TRANSMISSION (4 A / T)
LINE PRESSURE TEST
Purpose of this test is to check operating conditions of each part by
measuring fluid pressure in fluid pressure line. Line pressure test
requires following conditions.

Automatic fluid is at normal operating temperature (70 to 80C /
158 ± 176F).

Fluid is filled to proper level (between FULL HOT and LOW HOT
on dipstick).
1) Apply parking brake securely and place checks against wheels.
2) Attach oil pressure gauge to fluid pressure check hole in trans-
mission case.
Special Tool
(A): 09925-37810
CAUTION:
After attaching oil pressure gauge, check that not fluid
leakage exists.
3) Depress foot brake fully, run engine at idle and stall and then
check fluid pressure in ªDº or ªRº range.
CAUTION:
Do not continue running engine at stall speed longer than
5 seconds.
G16 Engine
Engine runningLine pressuregg
modeªDº rangeªRº range
At idle speed3.9 ± 4.4 kg / cm2
55 ± 63 psi
5.1 ± 5.7 kg / cm2
73 ± 81 psi
At stall speed11.7 ± 13.2 kg / cm2
166 ± 188 psi
14.2 ± 16.7 kg / cm2
202 ± 237 psi
J20 Engine
Engine runningLine pressuregg
modeªDº rangeªRº range
At idle speed3.8 ± 4.3 kg / cm2
54 ± 61 psi
5.3 ± 5.9 kg / cm2
75 ± 84 psi
At stall speed9.7 ± 11.2 kg / cm2
138 ± 159 psi
12.9 ± 15.5 kg / cm2
183 ± 220 psi
H25 Engine
Engine runningLine pressuregg
modeªDº rangeªRº range
At idle speed3.9 ± 4.4 kg / cm2
55 ± 63 psi
6.6 ± 7.2 kg / cm2
94 ± 102 psi
At stall speed11.3 ± 12.7 kg / cm2
161 ± 181 psi
14.7 ± 22.7 kg / cm2
209 ± 323 psi