Suzuki Grand Vitara JB416 / JB420. Manual - part 224

5A-30 Automatic Transmission/Transaxle: 

Road Test

S5JB0A5104012

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 direct clutch

Inspect. If NG, replace.

Faulty 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 second brake

Inspect. If NG, replace.

Faulty one-way No.1 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 direct 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 O/D 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

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.

Automatic Transmission/Transaxle:  5A-31

Manual Road Test

S5JB0A5104013

This test checks the gears being used in “L”, “2”, “3” or “D” 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) With select lever in “P”, start engine and warm it up.
2) After warming up engine, turn ignition switch OFF and disconnect valve body connector (1).

3) With select lever in “L” range, start vehicle. Check that 1st gear is being used referring to V1000 table shown 

below.

4) While vehicle is running, shift select lever to “2” range and check that 1st gear is being used.
5) While vehicle is running, shift select lever to “3” or “D” range and check that 4th gear is being used.
6) After the checks, stop vehicle then turn ignition switch OFF, and connect valve body connector.
7) Clear DTC.

Vehicle speed per 1000 rpm in engine speed

Troubleshooting

Gear position

Vehicle speed

1st

9.2 km/h (5.7 mile/h)

2nd

17.4 km/h (10.8 mile/h)

3rd

26.0 km/h (16.2 mile/h)

4th

37.7 km/h (23.4 mile/h)

I5JA01511003-01

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.

5A-32 Automatic Transmission/Transaxle: 

Stall Test

S5JB0A5104014

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.

 

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: 2,450 – 2,750 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 O/D clutch

Inspect. If NG, replace.

Slippery forward clutch

Inspect. If NG, replace.

Faulty O/D one-way clutch

Inspect. If NG, replace.

Faulty one-way clutch No.2

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 direct clutch

Inspect. If NG, replace.

Slippery reverse brake

Inspect. If NG, replace.

Faulty O/D one-way 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.

Automatic Transmission/Transaxle:  5A-33

Time Lag Test

S5JB0A5104015

This test is to check conditions of clutch, reverse brake and fluid pressure. “Time lag” 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 respectively, depress brake pedal.
2) Start engine.
3) With stop watch ready, shift select lever from “N” to “D” range and measure time from that moment till shock is felt.
4) Similarly measure time lag by shifting select lever from “N” to “R” range.

Gear shifting time lag
“N” 

→ “D”: Less than 1.0 sec.

“N” 

→ “R”: Less than 1.4 sec.

NOTE

• When repeating this test, be sure to wait at least one minute after select lever is shifted back to “N” 

range.

• Engine should be warmed up fully for this test.
• Repeat test 3 times and take average of those data for final time lag data.

 

Troubleshooting

Condition

Possible cause

Correction / Reference Item

N 

→

 “D” time lag exceeds 

specification

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.

Faulty forward clutch

Inspect. If NG, replace.

Leakage from “D” range fluid pressure 
circuit

Overhaul or replace valve body assembly.

N 

→

 “R” time lag exceeds 

specification

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.

Faulty direct clutch

Inspect. If NG, replace.

Faulty reverse brake

Inspect. If NG, replace.

Leakage from “R” range fluid pressure 
circuit

Overhaul or replace valve body assembly.