P0594

Test 1:

Test 2 - Test 5:

Test 6 - Test 7:

SYMPTOM
P0594-SPEED CONTROL SERVO POWER CIRCUIT

WHEN MONITORED
With the ignition key on. The speed control switched on.

SET CONDITION
The PCM detects a open or short in the Speed Control Power Supply circuit. One Trip Fault.

POSSIBLE CAUSES
- (V30) S/C brake switch output circuit
- (V32) S/C power supply circuit
- (V30) S/C brake switch output circuit shorted to ground
- (V32) S/C power supply circuit shorted to ground
- (V30) S/C brake switch output circuit open
- Brake lamp switch
- PCM (S/C source circuit)