Suzuki Grand Vitara JB627. Manual — part 211
5A-28 Automatic Transmission/Transaxle:
Visual Inspection
S6JB0B5104008
Visually check the following parts and systems.
A/T Basic Check
S6JB0B5104009
This check is important for troubleshooting when TCM has detected no DTC and no abnormality has been noted in
visual inspection. Follow the flow table carefully.
Inspection Item
Referring
A/T fluid
Level, leakage, color
A/T fluid hoses
Disconnection, looseness,
deterioration
“Oil Cooler Hoses Replacement”
A/T select cable
Installation, operation
Engine oil
Level, leakage
“Engine Oil and Filter Change in Section 0B”
Engine coolant
Level, leakage
“Engine Coolant Change in Section 0B”
Battery
Fluid level, corrosion of terminal
Connectors of electric wire harness Disconnection friction
“Intermittent and Poor Connection Inspection in
Section 00”
Fuses
Burning
“Cautions in Body Electrical System Servicing in
Section 9A”
Parts
Installation, damage
Bolt
Looseness
Malfunction indicator lamp
Operation at engine start
“Malfunction Indicator Lamp (MIL) Check in
Section 1A”
Charge warning light
Operation at engine start
“Generator Symptom Diagnosis in Section 1J”
Engine oil pressure warning light
Operation at engine start
“Oil Pressure Switch Inspection in Section 9C”
Engine coolant temp. meter
Operation at engine start
Other parts that can be checked visually
Step
Action
Yes
No
1
Was “A/T System Check” performed?
Go to Step 2.
Go to “A/T System
Check”.
2
Perform “Road Test”
Is it OK?
Go to Step 3.
Proceed to
“Troubleshooting” in
“Road Test”.
3
Perform “Manual Road Test”
Is it OK?
Go to Step 4.
Proceed to
“Troubleshooting” in
“Manual Road Test”.
4
Perform “Engine Brake Test”
Is it OK?
Go to Step 5.
Proceed to
“Troubleshooting” in
“Engine Brake Test”.
5
Perform “Stall Test”
Is it OK?
Go to Step 6.
Proceed to
“Troubleshooting” in
“Stall Test”.
6
Perform “Time Lag Test”
Is it OK?
Go to Step 7.
Proceed to
“Troubleshooting” in
“Time Lag Test”.
7
Perform “Line Pressure Test”
Is it OK?
Go to Step 8.
Proceed to
“Troubleshooting” in
“Line Pressure Test”.
8
1) Proceed to “Trouble Diagnosis 1” in “A/T Symptom
Is trouble identified?
Repair or replace faulty
parts.
Go to Step 9.
9
1) Proceed to “Trouble Diagnosis 2” in “A/T Symptom
Is trouble identified?
Repair or replace faulty
parts.
Proceed to “Trouble
Diagnosis 3” in “A/T
Symptom Diagnosis”.
Automatic Transmission/Transaxle: 5A-29
Road Test
S6JB0B5104010
This test is to check if upshift, downshift and lock-up take place at specified speeds while actually driving vehicle on a
level road.
WARNING
!
• Carry out test in very little traffic area to prevent an accident.
• Test requires 2 persons, a driver and a tester.
1) Warm up engine.
2) With engine running at idle, shift select “D”.
3) Accelerate vehicle speed by depressing accelerator pedal gradually.
4) While driving in “D” range, check if gear shift and lock-up occur properly as shown in “Automatic Gear Shift Table”.
Troubleshooting
Condition
Possible cause
Correction / Reference Item
Unable to run in all range Faulty oil pump
Inspect. If NG, replace.
Seized or broken planetary gear
Inspect. If NG, replace.
Faulty torque converter
Inspect. If NG, replace.
Damaged drive plate
Inspect. If NG, replace.
Faulty valve body component
Replace valve body assembly.
Unable to run in reverse
position
Faulty reverse clutch
Inspect. If NG, replace.
Faulty 1st & reverse brake
Inspect. If NG, replace.
1
→
2 upshift fails to
occur
Malfunction of transmission range
sensor
Inspect. If NG, replace.
Maladjust shift control cable
Adjust.
Faulty valve body component
Replace valve body component.
Faulty 2nd brake
Inspect. If NG, replace.
Faulty one-way No.1 clutch
Inspect. If NG, replace.
Faulty one-way No.2 clutch
Inspect. If NG. replace.
2
→
3 upshift fails to
occur
Malfunction of transmission range
sensor
Inspect. If NG, replace.
Faulty valve body component
Replace valve body component.
Faulty reverse clutch
Inspect. If NG, replace.
3
→
4 upshift fails to
occur
Malfunction of transmission range
sensor
Inspect. If NG, replace.
Faulty valve body component
Replace valve body component.
Faulty direct clutch
Inspect. If NG, replace.
4
→
5 upshift fails to
occur
Malfunction of transmission range
sensor
Inspect. If NG, replace.
Malfunction of input shaft speed sensor Inspect. If NG, replace.
Faulty valve body component
Replace valve body component.
Faulty forward clutch
Inspect. If NG, replace.
Faulty No.1 brake
Inspect. If NG, replace.
Incorrect gear shift point Malfunction of throttle position sensor
Inspect. If NG, replace.
Malfunction of input shaft speed sensor Inspect. If NG, replace.
Malfunction of output shaft speed
sensor
Inspect. If NG, replace.
Malfunction of power mode switch
Inspect, If NG, replace.
Malfunction of transmission fluid
temperature sensor A
Inspect. If NG, replace.
TCC (lock-up) function
does not operate
Malfunction of engine coolant
temperature (ECT) sensor
Inspect. If NG, replace.
Malfunction of brake light switch
Inspect. If NG, replace.
Malfunction of throttle position sensor
Inspect. If NG, replace.
Faulty valve body component
Replace valve body component.
Faulty torque converter
Replace torque converter.
5A-30 Automatic Transmission/Transaxle:
Manual Road Test
S6JB0B5104011
WARNING
!
• Carry out test in very little traffic area to prevent an accident.
• Test requires 2 persons, a driver and a tester.
The purpose of this test is to judge whether causal factor of trouble which occurred in automatic transaxle is electrical
or mechanical by disconnecting transmission wire connector (1) and fixing automatic transaxle gear position (fail-safe
function).
1) Start engine and warm it up to normal operating temperature.
2) After warming up engine, turn ignition switch to OFF position and disconnect transmission wire connector (1).
3) Turn transfer switch (1) to 4H position (2) (motor-shift type).
4) Turn OFF all electrical loads.
With shift select lever shifted to each range (“L”, “3” and “D”) drive vehicle at 1,000 rpm engine speed and then
check vehicle speed by referring to “Fixed gear position”.
If vehicle speed is not as specified in “Fixed gear position” table, go to troubleshooting.
5) Connect transmission wire connector and clear DTC.
Fixed gear position
Troubleshooting
1
I6JB0B510014-01
2
1
I6JB0B510015-01
Selector lever position
Gear position
Vehicle speed
L range
3rd gear
Approx. 22 km/h (14 mile/h)
3 range
3rd gear
Approx. 22 km/h (14 mile/h)
D range
4th gear
Approx. 31 km/h (19 mile/h)
Condition
Possible cause
Correction / Reference Item
Selected gear is incorrect Faulty valve body component
Replace valve body assembly.
Faulty clutch or brake
Inspect clutch and brake. If any parts are faulty,
replace them.
Automatic Transmission/Transaxle: 5A-31
Stall Test
S6JB0B5104012
This test is to check overall performance of automatic transmission and engine by measuring stall speed at “D” and
“R” ranges. Be sure to perform this test only when transmission fluid is at normal operating temperature and its level is
between FULL and LOW marks.
CAUTION
!
• Do not run engine at stall more than 5 seconds continuously, for fluid temperature may rise
excessively high.
• After performing stall test, be sure to leave engine running at idle for longer than 1 minute before
another stall test.
• Do not perform stall test at transfer position in 4L.
1) Apply parking brake and block wheels.
2) Install tachometer.
3) Start engine with select lever shifted to “P”.
4) Depress brake pedal fully.
5) Shift select lever to “D” and depress accelerator pedal fully while watching tachometer. Read engine rpm quickly
when it has become constant (stall speed).
6) Release accelerator pedal immediately after stall speed is checked.
7) In the same way, check stall speed in “R” range.
8) Stall speed should be within following specification.
Engine stall speed
Standard: 2,320 – 2,620 rpm
Troubleshooting
Condition
Possible cause
Correction / Reference Item
Lower than standard level
in both “D” and “R” range
Engine output torque failure
Inspect and repair engine.
Faulty one-way clutch of torque
converter
Replace torque converter.
Higher than standard
level in “D” range
Malfunction of pressure control solenoid
valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Slippery forward clutch
Inspect. If NG, replace.
Faulty one-way No.3 clutch
Inspect. If NG, replace.
Leakage from “D” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Higher than standard
level in “R” range
Malfunction of pressure control solenoid
valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Slippery reverse clutch
Inspect. If NG, replace.
Slippery 1st and reverse brake
Inspect. If NG, replace.
Faulty one-way No.1 clutch
Inspect. If NG, replace.
Leakage from “R” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Higher than standard
level in both “D” and “R”
range
Malfunction of pressure control solenoid
valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Malfunction of primary regulator valve
(Low line pressure)
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Leakage from both “D” and “R” range
fluid pressure circuit
Overhaul or replace valve body assembly.
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