Cruise Control Communication Circuit Troubleshooting (A/T)

CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING (A/T)

1. Start the engine.
2. Turn on the cruise control main switch, then drive the vehicle to speeds over 25 mph (40 km/h) with the cruise control.

Does the cruise control operate?
YES - Go to step 3.
NO - Check the cruise control unit or cruise control actuator.




3. Measure the voltage between the No.4 terminal of the cruise control unit connector and ground.

Is there approx. 1 V?
YES - Go to step 4.
NO - Replace the cruise control unit.




4. Measure the voltage between the No.8 terminal of the TCM connector and ground.

Is there approx. 1 V?
NO - Repair short or open in the wire between the No.8 terminal and cruise control unit.