torque SUZUKI GRAND VITARA 2002 2.G Service Workshop Manual

YH4
GRAND
VITARA
Engine
Vehicle speed
sensor
Throttle position
sensor
ECT sensor
Cruise control
module
(if equipped)Torque converter Planetary gear
Final gear
reduction unit
Oil pump
Shift and TCC
solenoid valvesClutch and brake
Control valve
ªO / D OFFº lamp
ªPOWERº lamp
MILTransmission range
switch
O / D cut switch
P / N change switch
Transfer 4L switch
(if equipped)
CMP sensor Powertrain (engine) control module
Power transmission
Fluid pressure circuit
Electric signalInput speed sensor Brake pedal switch
Output speed sensor
AUTOMATIC TRANSMISSION (4 A / T) 7B1-7
ELECTRONIC SHIFT CONTROL SYSTEM
The gear ratio change in ªDº or ª2º range and torque converter clutch operation are controlled by Powertrain (En-
gine) Control Module.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-29
Gear shift Transmission fluid Running condition
ConditionPossible CauseCorrection
Poor 3±4 shift, ex-
3±4 shift valve stickingReplace.
cessive slippage
Shift solenoid valve-B stickingReplace.
Excessive shock on
Regulator valve stickingReplace.
1±2 shift
Faulty accumulator, second brake pistonReplace.
Excessive shock on
Regulator valve stickingReplace.
2±3 shift
Faulty accumulator, direct clutch pistonReplace.
Excessive shock on
3±4 shift
Regulator valve stickingReplace.
Non operate lock-
TCC (Lock-up) control valve stickingReplace.
up system
Solenoid valve No.2 (TCC solenoid valve)
stickingReplace.
TROUBLE DIAGNOSIS TABLE 3
ConditionPossible CauseCorrection
Low fluid pressure
Leakage from oil pressure circuitOverhaul.
Unable to run in all
range
Wear in oil pumpReplace.

Seizure in oil pumpReplace.

Fluid pressure leakage to over drive clutch
due to wear of oil pump bushingReplace.

Faulty in torque converterReplace.

YH4
GRAND
VITARA
7B1-30 AUTOMATIC TRANSMISSION (4 A / T)
Running condition Gear shift Abnormal
noise
ConditionPossible CauseCorrection
Poor 1st speed run-
ning or excessive
slippage in ªDº or ª2º
Fluid pressure leakage from forward clutch
due to wear or breakage of O/D case seal
ringReplace.

Overdrive clutch slippingReplace.
Unable to run or ex-
cessive slippage in
ªLº range
Fluid pressure leakage of forward clutch
due to wear or breakage of O/D case seal
ringReplace.

Reverse brake disc slippingReplace.

Broken brake piston O-ringReplace.
Unable to run or ex-
cessive slippage in
ªRº range
Fluid pressure leakage to direct clutch due
to wear or breakage of center support seal
ringReplace.

Worn direct clutchReplace.
Poor 1±2 shift, ex-
cessive slippage
Fluid pressure leakage to overdrive clutch
due to wear or breakage of O/D case seal
ringReplace.

Faulty second brakeReplace.

Broken O-ring of second brake pistonReplace.

Faulty second coast brake (in ª2º range)Replace.
Poor 2±3 shift, ex-
cessive slippage
Fluid pressure leakage to overdrive clutch
due to wear or breakage of O/D case seal
ringReplace.

Worn direct clutch bushingReplace.

Direct clutch slippingReplace.

Foreign material caught in direct clutch pis-
ton check ballReplace.
Poor start or surging
in ªDº range
Fluid pressure leakage of forward clutch
due to wear or breakage of O/D case seal
ringReplace.

Malfunction of forward clutchReplace.
Poor 3±4 shift, ex-
ili

Faulty overdrive brakeReplace.
cessive slippage
Faulty overdrive clutchReplace.
Poor start or judder-
ing in ªRº range
Fluid pressure leakage of direct clutch due
to wear or breakage of oil center support
seal ringReplace.

Worn direct clutchReplace.
Excessive shock on
1± 2 shift
Faulty one-way clutchReplace.
Non operate lock-up
system
Faulty torque converterReplace.
Abnormal noise in
ªPº or ªNº range
Worn oil pumpReplace.
SCAN TOOL DATA-Refer to SECTION 6 / 6-1.
INSPECTION OF PCM AND ITS CIRCUIT-Refer to SECTION 6 / 6-1.
WIRE HARNESS AND CONNECTORS-Refer to SECTION 6 / 6-1.

YH4
GRAND
VITARA
7B1-46 AUTOMATIC TRANSMISSION (4 A / T)
DTC P0741 TCC (LOCK-UP) SOLENOID VALVE PERFORMANCE OR STUCK OFF
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITIONTROUBLE AREA
While running in 2nd or 4th gear, D range, TCC control
of PCM does not agree with actual operation of trans-
mission TCC even though solenoid valve is electrically
in good condition.
(2 driving cycles detection logic)
TCC (lock-up) solenoid valve stuck

TCC control valve stuck

Valve body fluid passage clogged

TCC faulty
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 and keep driving
about 20 mph, 30 km/h in 2nd of ªDº range for 10 seconds. (Throttle valve should be not at idle position and
the opening should be kept constant in this step.)
5) Keep driving about 50 mph, 80 km/h in 4th of ªDº range for 10 seconds.
6) Release accelerator pedal, decrease vehicle speed and stop vehicle.
7) 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.
2TCC solenoid valve operation check:
1) Check TCC solenoid valve operation referring to
ªSolenoid Valves Operation Checkº in this section.
Is it in good condition?Go to Step 3.Faulty TCC solenoid
valve.
3Valve body check:
1) Check valve body referring to ªUnit Repairº in this
section.
Is it in good condition?Faulty torque
converter.Faulty valve body.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-55
Check resultPossible cause
Line pressure higher
than standard level in
each range
Malfunctioning regulator valve

Malfunctioning throttle valve

Maladjusted A / T throttle cable
Line pressure lower than
standard level in each
range
Defective O/D clutch

Defective oil pump

Malfunctioning throttle valve

Malfunctioning regulator value

Maladjusted A / T throttle cable
Line pressure lower than
standard level only in ªDº
range
Fluid leakage from forward clutch

Defective O/D clutch

Leakage from ªDº range fluid pressure cir-
cuit
Line pressure lower than
standard level only in ªRº
range
Fluid leakage from direct clutch

Defective O/D clutch

Fluid leakage from reverse brake

Fluid leakage from ªRº range fluid circuit
Tightening torque of transmission case plug:
17 N.m (1.7 kg-m, 12.0 lb-ft)
STALL TEST
This test is to check overall performance of automatic transmission
and engine by measuring stall speed at ªDº and ªRº ranges. Be sure
to perform this test only when transmission fluid is at normal operat-
ing temperature and its level is between FULL and LOW marks.
CAUTION:

Do not run engine at stall more than 5 seconds continu-
ously, for fluid temperature may rise excessively high.

After performing stall test, be sure to leave engine running
at idle for longer than 30 seconds before another stall test.
1) Apply parking brake and block wheels.
2) Install tachometer.
3) Start engine with select lever shifted to ªPº.
4) Depress brake pedal fully.
5) Shift select lever to ªDº and depress accelerator pedal fully while
watching tachometer. Read engine rpm quickly when it has be-
come constant (stall speed).
6) Release accelerator pedal immediately after stall speed is
checked.
7) In the same way, check stall speed in ªRº range.

YH4
GRAND
VITARA
7B1-56 AUTOMATIC TRANSMISSION (4 A / T)
8) Stall speed should be within the following specification.
Stall speed: 2,100 ± 2,400 r / min. for G16 engine
2,300 ± 2,600 r / min. for J20 engine
2,300 ± 2,600 r / min. for H25 engine
Check result
Possible cause
Lower than standard
level
Faulty engine output

Defective torque converter
Higher than standard
level in ªDº range
Slippery O/D clutch

Slippery forward clutch

Malfunctioning O/D one-way clutch

Malfunctioning one-way clutch No. 2

Low line pressure
Higher than standard
level in ªRº range
Slippery direct clutch

Slippery reverse brake

Low fluid pressure

Slippery O/D clutch

Defective O/D one-way clutch
ROAD TEST
This test is to check if upshift and downshift take place at specified
speed while actually driving vehicle on a level road.
WARNING:

Carry out test in very little traffic area to prevent an acci-
dent.

Test requires 2 persons, a driver and a tester.
1) Warm up engine.
2) With engine running at idle, shift select lever ªDº.
3) Accelerate vehicle speed by depressing accelerator pedal grad-
ually.
4) While driving in ªDº range, check if gear shift occurs properly as
shown in Gear Shift Diagram in this section.
Test result
Possible cause
When 1
2 upshift fails to
occur1±2 shift valve stuck
When 2
3 upshift fails to
occur2±3 shift valve stuck
When 3
O/D upshift
fails to occur3±4 shift valve stuck
When gear shift point is in-
correct
Maladjusted throttle cable

Defective shift solenoid valve
-A or -B

1±2, 2±3 or 3±4 shift valve not
operating properly

YH4
GRAND
VITARA
1. Dipstick (G16 / J20)
2. Dipstick (H25)
1. Drain plug
2. Propeller shaft
1. Dipstick (G16 / J20)
2. Dipstick (H25)
7B1-60 AUTOMATIC TRANSMISSION (4 A / T)
LEVEL CHECK AT ROOM TEMPERATURE
The fluid level check at room temperature performed after repair or
fluid change before test driving is just preparation for level check of
normal operating temperature. The checking procedure itself is the
same as that described previously. If the fluid level is between FULL
COLD and LOW COLD, proceed to test drive. And when the fluid
temperature has reached the normal operating temperature, check
fluid level again and adjust it as necessary.
FLUID CHANGE
1) Lift up vehicle.
2) With engine is cool, remove drain plug from oil pan and drain A / T
fluid.
3) Install drain plug.
Tightening Torque
(a): 23 N
.m (2.3 kg-m, 17.0 lb-ft)
4) Lower vehicle and fill proper amount of an equivalent of DEX-
RON
-III.
5) Check fluid level according to procedure described under LEV-
EL CHECK NORMAL OPERATING TEMPERATURE.
Fluid specification
An equivalent of DEXRON
-III
Fluid capacity
When draining
from drain plug
hole
2.5 liters (5.28/4.40 US/lmp.pt.)
When
overhauling
6.9 liters (14.58/12.14 US/lmp.pt.)
for G16
7.1 liters (15.00/12.50 US/lmp.pt.)
for J20 / H25

YH4
GRAND
VITARA
1. Manual selector assembly
(Select lever assembly)
2. Manual lever assembly
3. Select cable bracket
4. Select indicator
5. Slide cover
6. Select lever knob7. Spring
8. Knob button
9. Shift lock solenoid rod
10. Shift lock solenoid
11. Cover
12. Illumination lamp
13. Interlock cam
1. Interlock cam pin
(only for new selector assembly) Tightening Torque
(a): 18 N
.m (1.8 kg-m, 13.5 lb-ft)1. Manual lever
assembly
2. Select indicator
assembly
3. Illumination lamp
assembly
4. Bulb filter
5. Bulb
6. Knob assembly
7. Shift lock solenoid
Type-1 Type-2
Type-1
7B1-62 AUTOMATIC TRANSMISSION (4 A / T)
MANUAL SELECTOR ASSEMBLY
REMOVAL
1) Disconnect negative cable at battery.
2) Remove console box.
3) Disconnect connector for illumination lamp, shift lock solenoid
and overdrive OFF switch.
4) Disconnect interlock cable from interlock cam of selector as-
sembly.
5) Remove selector assembly mounting bolts.
6) Disconnect select cable from lever of selector assembly.
INSTALLATION
NOTE:
New selector assembly of Type-1 is supplied with held inter-
lock cam at interlock cable connecting position with pin. Re-
move this pin after connecting interlock cable to interlock cam
and tightening cable nut.
Reverse removal procedure to install noting the followings.

Connect interlock cable end to cam referring to steps 2) to 8) of
ªInterlock Cable Installationº section.

Upon completion of installation, confirm that brake (key) interlock
system operates properly.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-63
1. Select lever assembly
2. Bolt
3. Select cable
4. Cable bracket
5. Bolt
6. Blank
7. Washer
8. Clip
9. Nut
10. Manual select lever
11. Lock washer
12. Nut
13. Select cable joint
14. Bush
15. Washer
16. E-ring
17. Transmission range switch assembly
18. Bolt
1. Transmission range
sensor (switch)
2. Select cable
3. Manual shift lever
4. Select cable joint
1. Select cable joint
A. Align with cable joint
B. Tighten with wrench
Tightening Torque
(a): 13 N.m (1.3 kg-m, 9.5 lb-ft)
(b): 7 N.m (0.7 kg-m, 5.5 lb-ft)
INSPECTION
Check select lever for smooth and clear-cut movement and position
indicator for correct indication.
For operation of select lever, refer to left figure.
SELECT CABLE
ADJUSTMENT
1) Before tightening cable end nut, shift select lever to ªNº.
2) Also shift manual shift lever to ªNº.
NOTE:

Make sure that nut and cable joint have clearance under
above conditions.

If select cable has been moved, push it in arrow C direc-
tion as shown in figure at the left till it stops and then con-
firm that select lever is in ªNº position.
3) Turn nut A by hand till it contacts manual select cable joint.
Then tighten nut B with wrench.
4) After select cable was installed, check for the following.

Push vehicle with select lever shifted to ªPº.
Vehicle should not move.

Vehicle can not be driven in ªNº.

Vehicle can be driven in ªDº, ª2º, and ªLº.

Vehicle can be backed in ªRº.

YH4
GRAND
VITARA
AUTOMATIC TRANSMISSION (4 A / T) 7B1-65
1. Drain plug
2. Propeller shaft
1. Oiler (with transmission fluid)
2. Solenoid valve
3. BatteryA: Hole (Should be dry)
B: Exhausting fluid Terminal Arrangement of PCM Coupler
(Viewed from harness side)
WITH BATTERY VOLTAGE WITHOUT BATTERY VOLTAGE
H25 Engine
Shift solenoid valve ± A (#1)C51-1-6
Shift solenoid valve ± B (#2)C51-1-1
TCC (Lock-up) solenoid valveC51-1-2
REMOVAL
1) Pull out dipstick and lift up vehicle.
2) With engine cooled, remove drain plug from oil pan and drain
A / T fluid.
3) Install drain plug with gasket.
Tightening Torque
(a): 23 N
.m (2.3 kg-m, 17.0 lb-ft)
4) Remove exhaust pipe bracket and disconnect front propeller
shaft from front differential (if equipped).
5) Remove oil pan bolts.
6) Remove oil pan.
7) Remove oil tubes.
8) Remove solenoid valve No.1 (shift solenoid valve A and B) or so-
lenoid valve No.2 (TCC solenoid valve).
OPERATION CHECK
Whenever shift solenoid valves and TCC (lock-up) solenoid valve
are removed from transmission, verify their valve function physical-
ly before they are reinstalled.
1) Apply oiler to solenoid valve and give compression by hands
and then check to be sure that transmission fluid from oiler does
not come out of holes in solenoid valve when battery voltage is
not conducted.
2) Under the same conditions as above, conduct battery voltage
and then make sure that fluid comes out with vigor.
NOTE:

If fluid does not come out with vigor in above step 2 in-
spection, do not re-use that solenoid valve.

Figure at the left shows shift solenoid valve check.
Check TCC solenoid valve also in the same way.