NO.23 TRANSAXLE OVERHEATS [JA5A-EL]


23	TRANSAXLE OVERHEATS
DESCRIPTION	• Burnt smell emitted from transaxle. • Smoke emitted from transaxle.
POSSIBLE CAUSE	• The malfunction is restricted to the hindrance of coolant at the oil cooler. In addition, overheating of the transaxle may be caused by a malfunction of the TFT sensor. 1. Line pressure low • ATF level low • Incorrect throttle position signal • Throttle cable mis-adjustment 2. Oil cooler malfunction (Foreign material mixed in ATF) 3. TFT sensor malfunction 4. Excessive amount of ATF Note • Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.


STEP	INSPECTION		ACTION
1	Is the line pressure normal? (See Line Pressure Test.)	Yes	Go to the next step.
1	Is the line pressure normal? (See Line Pressure Test.)	No	Repair or replace any malfunctioning parts according to the inspection results.
2	Is the stall speed normal? (See Stall Speed Test.)	Yes	Go to the next step.
2	Is the stall speed normal? (See Stall Speed Test.)	No	Repair or replace any malfunctioning parts according to the inspection results.
3	Inspect the TFT sensor and related harness: vibration, intermittent open/short circuit Is it normal?	Yes	Go to the next step.
3		No	Repair or replace part if necessary.
4	Inspect the pressure control solenoid circuit. Is it normal?	Yes	Go to the next step.
4		No	Inspect for stuck pressure control solenoid. (See SOLENOID VALVE INSPECTION [JA5A-EL].)
5	Inspect for bending, damage, corrosion or kinks of the oil cooler pipes. Are oil cooler pipes normal?	Yes	Overhaul the control valve body and repair or replace any malfunctioning parts. (See ATX Workshop Manual.) If any problem remains, replace or overhaul the transaxle and repair or replace any malfunctioning parts. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [JA5A-EL].) (See ATX Workshop Manual.)
5		No	Replace any malfunctioning parts.
6	• Verify the test results. - If normal, return to the diagnostic index to service any additional symptoms. - If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. • If the vehicle is repaired, troubleshooting is completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.