DTC 012

DTC 012

CIRCUIT DESCRIPTION
The cruise control module applies voltage to the magnetic clutch when the cruise control system is engaged. The circuit between the cruise control module and the magnetic clutch in the actuator is interrupted by the stop lamp switch whenever the brake pedal is pressed.

DIAGNOSTIC AIDS
Check for the following:
- Stop lamp switch out of adjustment, or faulty.
- Open in the cruise control magnetic clutch.
- An open, short, or ground in the WHT/BLK, RED/GRN, RED/BLU, GRN/ORN, or RED/YEL wires.

An intermittent malfunction may be caused by a fault in the magnetic clutch electrical circuit. Inspect the wiring harness and components for any of the following conditions:
- Backed out terminals
- Improper mating of terminals
- Broken electrical connectors locks
- Improperly formed or damaged terminals
- Faulty terminal to wire connections
- Physical damage to the wiring harness
- A broken wire inside the insulation
- Corrosion of electrical connections, splices, or terminals

Repair any electrical circuit faults that were found.

TEST DESCRIPTION

Steps 1 - 11:

Steps 12 - 14:

The numbers below refer to the step numbers on the diagnostic table.
2. This step tests the resistance of the cruise control servo magnetic clutch circuit.
4. This step tests the stop lamp switch.
7. This step tests the cruise control actuator arm for free movement with the magnetic clutch de-energized.
8. This step tests the cruise control actuator arm for a malfunction with the magnetic clutch energized.