Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 310

5A-31 Automatic Transmission/Transaxle: 

Manual Road Test

S6JB0A5104013

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 valve body 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 valve body connector (1).

3) Turn OFF all electrical loads.

With shift select lever shifted to each range (“L”, “2”, “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.

4) Connect valve body connector and clear DTC.

Fixed gear position

Troubleshooting

Select lever position

Fixed gear position

Vehicle speed

L range

1st gear

Approx. 9.2 km/h (5.7 mile/h)

2 range

3rd gear

Approx. 17.4 km/h (10.8 mile/h)

3 range

4th gear

Approx. 37.7 km/h (23.4 mile/h)

D range

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.

Automatic Transmission/Transaxle:  5A-32

Stall Test

S6JB0A5104014

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.

5A-33 Automatic Transmission/Transaxle: 

Time Lag Test

S6JB0A5104015

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.

Automatic Transmission/Transaxle:  5A-34

Line Pressure Test

S6JB0A5104016

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 – 80 

°C / 158 – 176 °F).

• Fluid is filled to proper level (between FULL and LOW on dipstick).
• Air conditioner switch is turned OFF.

1) Apply parking brake securely and place chocks against wheels.
2) Remove fluid pressure check hole plug bolt.
3) Attach oil pressure gauge to fluid pressure check hole in transmission case.

Special tool
(A):  09925–37811–001 

CAUTION

!

 

After attaching oil pressure gauge, check that no fluid leakage exists.

 

4) Depress foot brake fully, run engine at idle and stall then check fluid pressure in “D” or “R” range.

CAUTION

!

 

• Do not continue running engine at stall speed longer than 5 seconds.
• After performing line pressure test, be sure to leave engine running at idle for longer than one 

minute before performing another line pressure test.

 

Automatic transmission line pressure

5) If check result is OK,disconnect special tool, then tighten fluid pressure check hole bolt to specified torque.

Tightening torque
Fluid pressure check hole bolt:  8 N·m (0.8 kgf-m, 6.0 lb-ft)

“D” range

“R” range

At idle speed

304 – 362 kPa

(3.1 – 3.7 kg/cm

2

, 44 – 53 psi)

440 – 538 kPa

(4.5 – 5.5 kg/cm

2

, 64 – 78 psi)

At stall speed

1161 – 1321 kPa

(11.8 – 13.5 kg/cm

2

, 168 – 192 psi)

1485 – 1790 kPa

(15.2 – 18.3 kg/cm

2

, 216 – 260 psi)

(A)

I5JB0A510019-01