Operation Test

WARNING: Doing this test by yourself can be dangerous. You could have an accident if you are looking at the manual or devices while driving, which may resulting in death or injury. Always have another person in the vehicle with you to read the manual or devices while you drive.

NOTES:
- This test verifies that the torque converter clutch control system and the torque converter are operating properly.

- Perform the OBD Test. Check for a code P0741 or P0743. Refer to the appropriate pinpoint test or procedure for diagnosis.

PROCEDURE
1. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in D range.
2. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h (50 mph), and tap the brake pedal with the left foot.
3. Engine rpm should increase when the brake pedal is tapped, and decrease about 5 seconds after the brake pedal is released. If this does not occur, refer to Torque Converter Operation Concern in SYMPTOM TROUBLESHOOTING.
4. If the vehicle stalls in D range at idle with the vehicle at a stop, move the selector lever to 1 range. If the vehicle stalls, the cause may be the converter control valve in the oil pump. Service as required. If the vehicle does not stall in 1 range, refer to Pinpoint Test C1 in Transmission Control Systems.