Suzuki Wagon R RB310 - Trouble Diagnosis Table-2

7B-18 AUTOMATIC TRANSMISSION (4 A/T)
Trouble diagnosis table-2
Mechanical Repair
Condition Possible Cause Correction
Vehicle does not move
at any range
• Manual valve faulty Clean or replace.
• Primary regulator valve faulty Clean or replace.
No gear
change
1st ↔ 2nd • Shift solenoid -D (No.4) and/or -E (No.5) stuck Clean or replace.
2nd ↔ 3rd • Shift solenoid -A (No.1), -C (No.3) and/or fail
valve No.1 stuck
Clean or replace.
3rd ↔ 4th • Shift solenoid -B (No.2), -C (No.3) and/or fail
valve No.2 stuck
Clean or replace.
Harsh engagement
P, N → R • Front clutch accumulator faulty Clean or replace.
N → D • 1st & 2nd brake accumulator faulty Clean or replace.
1st → 2nd at D
range or 2 range
• Front clutch accumulator faulty Clean or replace.
• Shift solenoid -D (No.4) Clean or replace.
2nd → 3rd at D
range
• Direct clutch accumulator faulty Clean or replace.
• Shift solenoid -E (No.5) Clean or replace.
3rd → 4th at D
range
• Overdrive brake accumulator faulty Clean or replace.
• Shift solenoid -B (No.2) Clean or replace.
All gear change • Primary regulator valve faulty Clean or replace.
Excessive slip
(low line pressure)
• Primary regulator valve faulty Clean or replace.
Vehicle does not
move at
1st, 2nd, 3rd and
reverse gear
• Rear clutch faulty Repair or replace.
Reverse gear • Reverse brake faulty Repair or replace.
2nd, 3rd and 4th
gear
• Front clutch faulty Repair or replace.
3rd and 4th gear • Direct clutch faulty Repair or replace.
1st and 2nd gear • 1st & 2nd brake faulty Repair or replace.
4th gear • Overdrive brake faulty Repair or replace.
Any forward and
reverse gear
• Parking lock pawl faulty Repair or replace.
Shock or engine stalls
when starting off and
stopping
• TCC (lock-up clutch) faulty Inspect and replace as necessary.
• TCC (lock-up) solenoid faulty Clean or replace.
• Lock-up control valve faulty Clean or replace.
• Lock-up signal valve faulty Clean or replace.
No up-shift
1st → 2nd • Front clutch faulty Repair or replace.
2nd → 3rd • Direct clutch faulty Repair or replace.
3rd → 4th • Overdrive brake faulty Repair or replace.
No engine
braking
2nd or 3rd gear • Front, rear or direct clutch or 1st & 2nd brake
faulty
Repair or replace
L range 1st gear • Direct clutch or 1st & 2nd brake faulty Repair or replace.
No lock-up • Torque converter clutch faulty Inspect and replace as necessary.
• Lock-up control valve faulty Clean or replace.
• TCC (lock-up) solenoid faulty Clean or replace.
• Secondary regulator valve faulty Clean or replace.
• Signal valve faulty Clean or replace.