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 O/D control 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 cruise control terminal of the TCM(or PCM) connector and ground.

Is there approx. 1 V?

YES: Check for loosen connectors. If necessary replace the TCM and recheck.

NO: Repair short or open in the wire between the TCM (or PCM) terminal and cruise control unit.