P0594

Test 1 - Test 2:

Test 3 - Test 6:

Test 7 - Test 9:

SYMPTOM
P0594-SPEED CONTROL SERVO POWER CIRCUIT

WHEN MONITORED
Engine running, the speed control switched on and learned, and the brake pedal is not pressed. No other fault has occurred this trip.

SET CONDITION
The speed control power supply circuit is either open or shorted to ground. Cruise will be disabled for the remainder of that key-on cycle. One Trip Fault. Three good trips to clear the MIL.

POSSIBLE CAUSES
- Good trip equal to zero
- (V32) S/C supply circuit open
- (V32) S/C supply circuit shorted to ground
- Brake lamp switch
- (V30) S/C brake switch output
- (V30) S/C brake switch output circuit open
- (V30) S/C brake switch output circuit shorted to ground
- PCM