2004 SUZUKI GRAND VITARA Engine

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
1. Shift solenoids connector
AUTOMATIC TRANSMISSION (4 A / T) 7B1-57
MANUAL ROAD TEST
This test check the gear being used in ªLº, ª2º or ªDº range when
driven with unoperated gear shift control system. Test drive vehicle
on a level road.
NOTE:
Before this test, check diagnostic trouble code (DTC).
1) Disconnect coupler of shift solenoid valves on transmission.
WARNING:
To avoid the danger of being burned, do not touch the hot
exhaust system when disconnecting shift solenoid
valves coupler.
2) With select lever in ªPº, start engine and warm it up.
3) With select lever in ªLº range, start vehicle and accelerate to 20
km/h (12.5 mile/h). Check in this state that 1st gear is being
used.
4) At 20 km/h (12.5 mile/h), shift select lever to 2 range and acceler-
ate to 40 km/h (25 mile/h). Check in this state that 3rd gear is
being used.
5) At 40 km/h (25 mile/h), shift select lever to D range and check
that O/D gear is used when speed is higher than 40 km/h (25
mile/h).
6) After above checks, stop vehicle then engine, and connect shift
solenoids coupler with ignition switch OFF.
WARNING:
To avoid the danger of being burned, do not touch the hot
exhaust system when connecting shift solenoid valves
coupler.
7) Clear DTC with scan tool.
TIME LAG TEST
This test is to check conditions of clutch, reverse brake and fluid
pressure. ªTime lagº means time elapsed since select lever is
shifted with engine idling till shock is felt.
1) With chocks placed before and behind front and rear wheels re-
spectively, depress brake pedal.
2) Start engine.
3) With stop watch ready, shift select lever from ªNº to ªDº range
and measure time from that moment till shock is felt.
4) Similarly measure time lag by shifting select lever from ªNº to ªRº
range.
Specification for ªNº
ªDºLess than 1.2 sec.
time lagªNº
ªRºLess than 1.5 sec.
NOTE:

When repeating this test, be sure to wait at least minute
after select lever is shifted back to ªNº range.

Engine should be warmed up fully for this test.
Test resultPossible causes
When ªNº
ªDº time lag
exceeds specification
Low line pressure

Worn forward clutch
When ªNº
ªRº time lag
exceeds specification
Low line pressure

Worn direct clutch

Worn reverse brake

YH4
GRAND
VITARA
7B1-58 AUTOMATIC TRANSMISSION (4 A / T)
ENGINE BRAKE TEST
WARNING:
Before test, make sure that there is no vehicle behind so as
to prevent rear-end collision.
1) While driving vehicle in 3rd gear of ªDº range, shift select lever
down to ª2º range and check if engine brake operates.
2) In the same way as in step 1, check engine brake for operation
when select lever is shifted down to ªLº range.
3) If engine brake fails to operate in above tests, possible causes
for such failure are as follows. Check each part which is sus-
pected to be the cause.
Condition
Possible cause
Fails to operate when shifted
down to ª2º rangeSecond coast brake defec-
tive
Fails to operate when shifted
down to ªLº rangeReverse brake defective
ªPº RANGE TEST
1) Stop vehicle on a slope, shift select lever to ªPº range and at the
same time apply parking brake.
2) After stopping engine, depress brake pedal and release parking
brake.
3) Then, release brake pedal gradually and check that vehicle re-
mains stationary.
4) Depress brake pedal and shift select lever to ªNº range.
5) Then, release brake pedal gradually and check that vehicle
moves.
WARNING:
Before test, check to make sure no one is around vehicle
or down on a slope and keep watchful for safety during
test.

YH4
GRAND
VITARA
1. Dipstick (G16 / J20)
2. Dipstick (H25)
AUTOMATIC TRANSMISSION (4 A / T) 7B1-59
ON-VEHICLE SERVICE
MAINTENANCE SERVICE
FLUID LEVEL
LEVEL CHECK AT NORMAL OPERATING TEMPERATURE
1) Stop vehicle and place it level.
2) Apply parking brake and place chocks against wheels.
3) With selector at P position, start engine.
4) Warm up engine till fluid temperature reaches normal operating
temperature (70 ± 80C / 158 ± 176F). As a guide to check fluid
temperature, warm up engine till engine coolant temperature
meter indicated around 1 unit above ªCº point.
5) Keep engine idling and shift selector slowly to L and back to P
position.
6) With engine idling, pull out dipstick, wipe it off with a clean cloth
and put it back into place.
7) Pull out dipstick again and check fluid level indicated on it. Fluid
level should be between FULL HOT and LOW HOT. If it is below
LOW HOT, add an equivalent of DEXRON-III up to FULL HOT.
Fluid specification
An equivalent of DEXRON-III
NOTE:

DO NOT RACE ENGINE while checking fluid level, even af-
ter the engine start.

DO NOT OVERFILL. Overfilling can causes foaming and
loss of fluid through breather. Then slippage and trans-
mission failure can result.

Bringing the level from LOW HOT to FULL HOT requires
0.3 liters (0.64/0.53 US/lmp.pt).

If vehicle was driven under high load such as pulling a
trailer, fluid level should be checked about half an hour af-
ter it is stopped.

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. Radiator
2. Inlet hose (Outlet from oil cooler)
3. Outlet hose (Inlet to coil cooler)
4. Converter housing
5. Outlet hose
6. Inlet hose
1. A / T throttle cable
2. Adjusting nut
3. Lock nut
1. A / T throttle cable
2. Adjusting nut
3. Lock nut
G16 / J20
H25
1. A / T throttle cable
2. Stopper
3. Inner cable
4. A / T assemblyR100 mm
(3.94 in.)
AUTOMATIC TRANSMISSION (4 A / T) 7B1-61
OIL COOLER HOSES
When replacing them, be sure to note the followings.

to replace clamps at the same time.

to insert hose as far as its limit mark.

to clamp hose securely.
A / T THROTTLE CABLE
ADJUSTMENT
1) Pull inner cable by force of 2 N (0.2 kg, 0.45 lb) or less to be no
slack of inner cable with A / T throttle cable curved as shown in
the figure.
2) Fix stopper to inner cable with clearance ªcº.
Clearance ªcº : 0.8 ± 1.5 mm (0.03 ± 0.06 in.)
3)For G16 / J20 engines
a) Check clearance ªcº. If it is out of specifications, adjust it by
turning cable adjusting nut.
Clearance ªcº : 0.8 ± 1.5 mm (0.03 ± 0.06 in.)
b) Tighten lock nut securely.
For H25 engine
a) Warm up engine and transmission to normal operating tem-
perature.
b) Make sure that accelerator cable is adjusted as specified.
c) With throttle valve closed, check clearance ªcº which should
be within the following specification.
Clearance ªcº : 0.8 ± 1.5 mm (0.03 ± 0.06 in.)
If it is out of specification, adjust it by turning cable adjusting nut.

YH4
GRAND
VITARA
7B1-64 AUTOMATIC TRANSMISSION (4 A / T)
1. A / T vehicle (output) speed sensor
ªNº reference
line
Center line on
manual valve shaft
G16 / J20
1. Service wire
2. PCM connectors disconnected
Switch
position
TRANSMISSION RANGE SWITCH (SENSOR)
INSPECTION & ADJUSTMENT
1) Shift select lever to ªNº range.
2) Check that center line on manual valve shaft and ªNº reference
line on switch are aligned. If not, loosen switch bolt and align
them.
3) Check that engine starts in ªNº and ªPº ranges but it doesn't start
in ªDº, ª2º, ªLº or ªRº range. Also, check that back-up lamp lights
in ªRº range.
4) If faulty condition cannot be corrected by adjustment, discon-
nect transmission range switch coupler and check that continu-
ity exists as shown by moving select lever.
Terminal No.54982310765498231076
P
R
N
D
2
L
A / T OUTPUT SPEED SENSOR
INSPECTION
Check A / T output speed sensor for resistance between terminals
of sensor or PCM coupler.
A / T output speed sensor
resistance value : 387 ± 473
at 20
C, 68
F
O / D CUT SWITCH
INSPECTION
Check O / D cut switch for operation referring to step 4 of Diag. Flow
Table B-2 in this section.
If malfunction is found, replace.
SOLENOID VALVES
(Shift solenoid valves & TCC solenoid valve)
INSPECTION
With couplers of PCM disconnected and using service wire as
shown at the left, check each solenoid valve for clicking sound.
G16 / J20 Engines
Shift solenoid valve - A (#1)C51-1-2
Shift solenoid valve - B (#2)C51-1-1
TCC (Lock-up) solenoid valveC51-1-8

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.