Suzuki Grand Vitara JB627. Manual - part 212

5A-32 Automatic Transmission/Transaxle: 

Time Lag Test

S6JB0B5104013

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 1.2 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.

Faulty one-way No.3 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 reverse clutch

Inspect. If NG, replace.

Faulty 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.

Automatic Transmission/Transaxle:  5A-33

Line Pressure Test

S6JB0B5104014

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

356 – 416 kPa

(3.6 – 4.1 kg/cm

2

, 52 – 58 psi)

482 – 562 kPa

(4.9 – 5.6 kg/cm

2

, 70 – 79 psi)

At stall speed

1370 – 1480 kPa

(13.7 – 14.8 kg/cm

2

, 195 – 210 psi)

1642 – 1850 kPa

(16.5 – 18.5 kg/cm

2

, 235 – 263 psi)

(A)

I6JB01510011-01

5A-34 Automatic Transmission/Transaxle: 

Troubleshooting

Engine Brake Test

S6JB0B5104015

WARNING

!

 

Before test, make sure that there is no vehicle behind so as to prevent rear-end collision.

 

1) While driving vehicle in 4th gear of “D” range, shift select lever down to “3” 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 “L” range.
3) Engine brake should operate in the test.

Troubleshooting

“P” Range Test

S6JB0B5104016

1) Stop vehicle on a slope of 5 degrees or more, shift select lever to “P” 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 remains stationary.
4) Depress brake pedal and shift select lever to “N” range.
5) Then, release brake pedal gradually and check that vehicle moves.

WARNING

!

 

Before test, make sure no one is around vehicle or down on a slope and keep watchful for safety 
during test.

 

Condition

Possible cause

Correction / Reference Item

Higher than standard 
level in each range

Malfunction of pressure control solenoid 
valve-A (Low line pressure)

Inspect. If NG, replace valve body assembly.

Malfunction of primary regulator valve 
(Low line pressure)

Replace valve body assembly.

Lower than standard level 
in each range

Malfunction of pressure control solenoid 
valve-A (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.

Lower than standard level 
only in “D” range

Leakage from “D” range fluid pressure 
circuit

Overhaul or replace valve body assembly.

Faulty forward clutch

Inspect. If NG, replace.

Lower than standard level 
only in “R” range

Leakage from “R” range fluid pressure 
circuit

Overhaul or replace valve body assembly.

Faulty reverse clutch

Inspect. If NG, replace.

Faulty 1st and reverse brake

Inspect. If NG, replace.

Condition

Possible cause

Correction / Reference Item

Failure to operate when 
shifted down to “3” range

Faulty No.1 brake

Inspect. If NG, replace.

Faulty No.2 brake

Inspect. If NG, replace.

Failure to operate when 
shifted down to “L” range

Faulty 1st / reverse brake

Inspect. If NG, replace.

Automatic Transmission/Transaxle:  5A-35

Troubleshooting

A/T Symptom Diagnosis

S6JB0B5104017

Trouble Diagnosis 1
Electrical repair

Condition

Possible cause

Correction / Reference Item

Vehicle moves at “P” 
range or remains 
stationary at “N” range

Defective parking lock pawl or spring

Inspect. If NG, repair.

Condition

Possible cause

Correction / Reference Item

Poor 1 

→

 2 and/or 2 

→

 1 

shift

Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent 

trouble. If NG, repair.

Shift solenoid valve-B circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.

Poor 2 

→

 3 and/or 3 

→

 2 

shift

Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent 

trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.

Poor 3 

→

 4 and/or 4 

→

 3 

shift

Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent 

trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.

Poor 4 

→

 5 and/or 5 

→

 4 

shift

Transmission range sensor

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Shift solenoid valve-E circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Pressure control solenoid valve-B circuit 
faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Pressure control solenoid valve-C circuit 
faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Input shaft speed sensor circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.

Incorrect gear shift point Accelerator pedal position (APP) sensor 

circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Input shaft speed sensor circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent 

trouble. If NG, repair.

Pressure control solenoid valve-A circuit 
faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Transmission fluid temperature sensor A 
circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.

TCC (lock-up) function 
does not operate

TCC solenoid valve circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Engine coolant temperature (ECT) 
sensor circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

No kick down

Shift solenoid valve-A circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Shift solenoid valve-B circuit faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

Higher or lower stall 
speed

Pressure control solenoid valve-A circuit 
faulty

Inspect circuit for open, short and intermittent 
trouble. If NG, repair.

TCM

Substitute a known-good TCM and recheck.