7B1-34 AUTOMATIC TRANSAXLE (M13 ENGINE)
Road Test
This test is to check if upshift, downshift and lock-up take place at specified speeds while actually driving vehicle
on a level road.
1) Warm up engine.
2) With engine running at idle, shift selector lever to “D” range.
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 “Gear Shift Diagram
and Lock-Up Diagram”. (Refer to “Automatic Gear Shift Diagram” in this section.)
Troubleshooting
WARNING:
• Carry out test in very little traffic area to prevent an accident.
• Test requires 2 persons, a driver and a tester.
Condition Possible Cause Correction
Unable to run in all
range
Faulty valve body component Replace valve body assembly
Faulty oil pump
Inspect. If NG, replace.
Seized or broken planetary gear
Faulty one-way No.2 clutch
Faulty forward clutch
Faulty reverse clutch
Faulty 1st and reverse brake
Damaged drive plate
Faulty torque converter Replace.
No gear shift as 3rd
gear
Malfunction of shift solenoid valve-A and/or-B
Inspect. If NG, replace.
Malfunction of timing solenoid valve
Malfunction of pressure control solenoid valve
Inspect. If NG, replace valve body
assembly.
1
→
2 upshift fails to
occur
Malfunction of shift solenoid valve-B
Inspect. If NG, replace.
Malfunction of output shaft speed sensor (VSS)
Malfunction of throttle position sensor
Malfunction of transmission range sensor
Faulty valve body component Replace valve body assembly
Faulty 2nd brake
Inspect. If NG, replace.
Faulty one-way No.1 clutch
2
→
3 upshift fails to
occur
Malfunction of shift solenoid valve-A
Inspect. If NG, replace.
Malfunction of output shaft speed sensor (VSS)
Malfunction of throttle position sensor
Malfunction of transmission range sensor
Faulty valve body component Replace valve body assembly.
Faulty direct clutch Inspect. If NG, replace.
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