P1683

Test 1 - 4:

Test 5 - 9:

Test 10 - 14:

Test 15 - 17:

SYMPTOM
P1683-SPD CTRL PWR RELAY; OR S/C 12V DRIVER CKT

TEST NOTE
This symptom is diagnosed using the test P1595-SPEED CONTROL SOLENOID CIRCUITS.

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

SET CONDITION
The speed control power supply circuit is either open or shorted to ground.

POSSIBLE CAUSES
- Good trip equal to zero
- Intermittent condition
- O2 servo
- (Z190) ground circuit open
- (V30) S/C brake switch output circuit
- Brake switch output(V30) speed control circuit open
- Brake lamp switch
- (V32) speed control power supply circuit
- PCM (S/C power supply)
- Speed control vacuum solenoid
- (V36) speed control vacuum solenoid control circuit open
- (V36) speed control vacuum solenoid control circuit shorted to ground
- PCM (vacuum solenoid)
- Speed control vent solenoid
- (V35) speed control vent solenoid control circuit open
- (V35) speed control vent solenoid control circuit shorted to ground
- PCM (vent solenoid)