NO.23 TRANSAXLE OVERHEATS [AY6A-EL, AY6AX-EL]

id0503k3802800

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. ― Line pressure low • ATF level low • Incorrect accelerator opening signal • Line pressure control solenoid malfunction ― Oil cooler malfunction (Foreign material mixed in with ATF) ― TFT sensor malfunction ― 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. (See BASIC INSPECTION [AY6A-EL, AY6AX-EL].)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Inspect the TFT sensor and related wiring harness: vibration, intermittent open/short circuit (See TRANSAXLE FLUID TEMPERATURE (TFT) SENSOR INSPECTION [AY6A-EL, AY6AX-EL].) • Is it normal? | Yes | Go to the next step.
No | Repair or replace part if necessary.
2 | • Inspect the line pressure control solenoid. (See LINE PRESSURE CONTROL SOLENOID INSPECTION [AY6A-EL, AY6AX-EL].) • Is it normal? | Yes | Go to the next step.
No | Inspect the coupler component. If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
3 | • Inspect for bending, damage, corrosion or kinks of the oil cooler pipes. • Are oil cooler pipes normal? | Yes | Replace the transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
No | Replace any malfunctioning parts.
4 | • Verify test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. • If the vehicle is repaired, troubleshooting completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.