NO.23 TRANSAXLE OVERHEATS [FN4A-EL]


23	Transaxle overheats
DESCRIPTION	• Burnt smell emitted from transaxle. • Smoke emitted from transaxle.
POSSIBLE CAUSE	• The malfunction is restricted to hindrance of coolant at the oil cooler. In addition, overheating of the transaxle may be caused by a malfunction of the transaxle fluid temperature sensor. 1. Burned (TCC) • Line pressure low • Control valve body malfunction • Accelerator cable misadjustment 2. Oil cooler malfunction (Foreign material mixed ATF) 3. Transaxle fluid temperature sensor malfunction 4. Excessive amount of ATF 5. Torque converter malfunction Note • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.


STEP	INSPECTION		ACTION
1	• Inspect for bent, damage, corrosion or kinks of oil cooler pipes. • Are oil cooler pipes normal?	Yes	Go to next step.
1		No	Replace any defective parts.
2	• Perform the stall test. (See Stall Test.) • Is stall speed normal?	Yes	Go to next step.
2		No	Repair or replace any defective parts.
3	• Check the value at the following PID using the WDS or equivalent. (See PCM INSPECTION [WITHOUT WU-TWC].) (See PCM INSPECTION [WITH WU-TWC].) - TP • Is PID value normal?	Yes	Go to next step.
3		No	Repair or replace any defective parts.
4	• Disconnect PCM. • Is resistance between ground terminal at PCM connector and body ground less than 5.0 ohms?	Yes	Go to next step.
4		No	Repair open ground circuit. Reconnect PCM.
5	• Check LPS PID value. (See PCM INSPECTION [WITHOUT WU-TWC].) (See PCM INSPECTION [WITH WU-TWC].) • Is LPS PID value normal?	Yes	Overhaul control valve body and repair or replace any defective parts. (See ATX workshop manual (FN4A-EL) [1623-10-98E].) If problem remains, overhaul transaxle and repair or replace any defective parts. (See ATX workshop manual (FN4A-EL) [1623-10-98E].)
5		No	Repair or replace any defective parts.
6	• Verify test results. - If normal, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Information and perform repair or diagnosis. • If vehicle repaired, troubleshooting completed. • If vehicle not repaired or additional diagnostic information not available, replace PCM.