Conditions

Lock-Up Function Defective
Fault symptoms
CHECK GEARBOX warning lamp on.

Lock-up function disconnected.

Conditions
The difference between engine speed and the transmission's input shaft speed is greater than 100 rpm for 10 seconds.

Diagnosis will not be performed if:
- The engine is idling or running at more than 4000 rpm.

- Less than 5 seconds has elapsed since shifting occurred.

- DTC 0717 has been generated.

Diagnostic help
Check the wiring to the Lock Up solenoid. Under certain driving conditions, diagnostic trouble code P0741 is generated.