Torque Converter Operation Test

Torque Converter Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out the Quick Test; refer to the tester manual. Check for DTCs.
2. Connect a tachometer to the engine.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. After normal operating temperature is reached, maintain constant vehicle speed of about 80 km/h (50 mph) and tap the brake pedal with the left foot.
5. Engine rpm should increase when brake pedal is tapped, and decrease about five seconds after the pedal is released. If this does not occur, see the Torque Converter Operation Concerns in Diagnosis By Symptom. AX4S
6. If the vehicle stalls in (D) or drive, at idle with vehicle at a stop, move the selector lever to manual 1 position. If the vehicle stalls, refer to Torque Converter Operation Concerns in Diagnosis By Symptom. Repair as necessary. If the vehicle does not stall in (D), refer to Diagnosis By Symptom.