Road Test: Troubleshooting

Condition	Possible Cause	Action
Unable to run in all range	Faulty oil pump	Inspect. If NG, replace .
	Seized or broken planetary gear	Inspect. If NG, replace .
	Faulty torque converter	Inspect. If NG, replace .
	Damaged drive plate	Inspect. If NG, replace .
	Faulty valve body component	Replace valve body assembly .
Unable to run in reverse position	Faulty direct clutch	Inspect. If NG, replace .
Unable to run in reverse position	Faulty reverse brake	Inspect. If NG, replace .
1 → 2 upshift fails to occur	Malfunction of transmission range sensor	Inspect. If NG, replace .
	Maladjusted shift control cable	Adjust .
	Faulty valve body component	Replace valve body component .
	Faulty second brake	Inspect. If NG, replace .
	Faulty one-way No. 1 clutch	Inspect. If NG, replace .
	Faulty one-way No. 2 clutch	Inspect. If NG, replace .
2 → 3 upshift fails to occur	Malfunction of transmission range sensor	Inspect. If NG, replace .
	Faulty valve body component	Replace valve body component .
	Faulty direct clutch	Inspect. If NG, replace .
3 → 4 upshift fails to occur	Malfunction of transmission range sensor	Inspect. If NG, replace .
	Faulty valve body component	Replace valve body component .
	Faulty O/D brake	Inspect. If NG, replace .
Incorrect gear shift point	Malfunction of throttle position sensor	Inspect. If NG, replace .
	Malfunction of input shaft speed sensor	Inspect. If NG, replace .
	Malfunction of output shaft speed sensor	Inspect. If NG, replace .
	Malfunction of transmission fluid temperature sensor	Inspect. If NG, replace .
TCC (lock-up) function does not operate	Malfunction of engine coolant temperature (ECT) sensor	Inspect. If NG, replace .
	Malfunction of brake light switch	Inspect. If NG, replace .
	Malfunction of throttle position sensor	Inspect. If NG, replace .
	Faulty valve body component	Replace valve body component .
	Faulty torque converter	Replace torque converter .