Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 311

5A-35 Automatic Transmission/Transaxle: 

Troubleshooting

Engine Brake Test

S6JB0A5104017

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

Condition

Possible cause

Correction / Reference Item

Higher than standard 
level in each range

Malfunction of pressure control solenoid 
valve (High line pressure)

Inspect. If NG, replace valve body assembly.

Malfunction of primary regulator valve 
(High line pressure)

Replace valve body assembly.

Lower than standard level 
in each 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.

Defective O/D clutch

Inspect. If NG, replace.

Leakage from both “D” and “R” range 
fluid pressure circuit

Inspect. If NG, replace valve body assembly.

Lower than standard level 
in “D” range

Fluid leakage from direct clutch

Inspect. If NG, replace.

Defective O/D clutch

Inspect. If NG, replace.

Leakage from “D” range fluid pressure 
circuit

Inspect. If NG, replace valve body assembly.

Lower than standard level 
in “R” range

Fluid leakage from direct clutch

Inspect. If NG, replace.

Defective O/D clutch

Inspect. If NG, replace.

Fluid leakage from reverse brake

Inspect. If NG, replace.

Leakage from “R” range fluid pressure 
circuit

Inspect. If NG, replace valve body assembly.

Condition

Possible cause

Correction / Reference Item

Failure to operate when 
shifted down to “2” range

Faulty second coast brake

Inspect. If NG, replace.

Failure to operate when 
shifted down to “L” range

Faulty reverse brake

Inspect. If NG, replace.

Automatic Transmission/Transaxle:  5A-36

“P” Range Test

S6JB0A5104018

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.

 

Troubleshooting

A/T Symptom Diagnosis

S6JB0A5104019

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

Excessive shift shock

Shift solenoid valve No.1 and/or No.2 
circuit faulty

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

Pressure control solenoid valve circuit 
faulty

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

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

If NG, repair.

Input shaft speed sensor circuit faulty

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

Transmission fluid temperature sensor 
circuit faulty

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

CAN communication circuit faulty

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

Accelarator pedal position sensor circuit 
faulty

Inspect circuit for open, short and intermittent 
referring to “DTC P0122: Throttle Position 
Sensor (Main) Circuit Low: For Petrol Engine 
Model in Section 1A”, “DTC P0123: Throttle 
Position Sensor (Main) Circuit High: For Petrol 
Engine Model in Section 1A”, “DTC P0222: 
Throttle Position Sensor (Sub) Circuit Low: For 
Petrol Engine Model in Section 1A” and “DTC 
P0223: Throttle Position Sensor (Sub) Circuit 
High: For Petrol Engine Model in Section 1A”.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

No gear shift as 3rd gear Shift solenoid valve No.1 and/or No.2 

circuit faulty

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

Pressure control solenoid valve circuit 
faulty

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

TCM

Substitute a known-good TCM and recheck.

5A-37 Automatic Transmission/Transaxle: 

Poor 1 

→

 2 shift

Shift solenoid valve No.2 circuit faulty

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

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

If NG, repair.

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

If NG, repair.

CAN communication circuit faulty

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

Accelerator pedal position sensor circuit 
faulty

Inspect circuit for open, short and intermittent 
referring to “DTC P0122: Throttle Position 
Sensor (Main) Circuit Low: For Petrol Engine 
Model in Section 1A”, “DTC P0123: Throttle 
Position Sensor (Main) Circuit High: For Petrol 
Engine Model in Section 1A”, “DTC P0222: 
Throttle Position Sensor (Sub) Circuit Low: For 
Petrol Engine Model in Section 1A” and “DTC 
P0223: Throttle Position Sensor (Sub) Circuit 
High: For Petrol Engine Model in Section 1A”.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Poor 2 

→

 3 shift

Shift solenoid valve No.1 circuit faulty

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

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

If NG, repair.

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

If NG, repair.

CAN communication circuit faulty

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

Accelerator pedal position sensor circuit 
faulty

Inspect circuit for open, short and intermittent 
referring to “DTC P0122: Throttle Position 
Sensor (Main) Circuit Low: For Petrol Engine 
Model in Section 1A”, “DTC P0123: Throttle 
Position Sensor (Main) Circuit High: For Petrol 
Engine Model in Section 1A”, “DTC P0222: 
Throttle Position Sensor (Sub) Circuit Low: For 
Petrol Engine Model in Section 1A” and “DTC 
P0223: Throttle Position Sensor (Sub) Circuit 
High: For Petrol Engine Model in Section 1A”.

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Condition

Possible cause

Correction / Reference Item

Automatic Transmission/Transaxle:  5A-38

Poor 3 

→

 O/D shift

Shift solenoid valve No.2 circuit faulty

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

Pressure control solenoid valve circuit 
faulty

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

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

If NG, repair.

Inputshaftspeedsensor circuit faulty

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

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

If NG, repair.

CAN communication circuit faulty

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

Accelerator pedal position sensor circuit 
faulty

Inspect circuit for open, short and intermittent 
referring to “DTC P0122: Throttle Position 
Sensor (Main) Circuit Low: For Petrol Engine 
Model in Section 1A”, “DTC P0123: Throttle 
Position Sensor (Main) Circuit High: For Petrol 
Engine Model in Section 1A”, “DTC P0222: 
Throttle Position Sensor (Sub) Circuit Low: For 
Petrol Engine Model in Section 1A” and “DTC 
P0223: Throttle Position Sensor (Sub) Circuit 
High: For Petrol Engine Model in Section 1A”.

“3” position switch circuit faulty

Refer to “No Gear Shift to 4th Gear”

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Poor O/D 

→

 3 shift

Shift solenoid valve No.2 circuit faulty

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

Pressure control solenoid valve circuit 
faulty

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

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

If NG, repair.

Input shaft speed sensor circuit faulty

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

CAN communication circuit faulty

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

Accelerator pedal position sensor circuit 
faulty

Inspect circuit for open, short and intermittent 
referring to “DTC P0122: Throttle Position 
Sensor (Main) Circuit Low: For Petrol Engine 
Model in Section 1A”, “DTC P0123: Throttle 
Position Sensor (Main) Circuit High: For Petrol 
Engine Model in Section 1A”, “DTC P0222: 
Throttle Position Sensor (Sub) Circuit Low: For 
Petrol Engine Model in Section 1A” and “DTC 
P0223: Throttle Position Sensor (Sub) Circuit 
High: For Petrol Engine Model in Section 1A”.

“3” position switch circuit faulty

Refer to “No Gear Shift to 4th Gear”

TCM

Substitute a known-good TCM and recheck.

ECM

Substitute a known-good ECM and recheck.

Condition

Possible cause

Correction / Reference Item