P1683

Tests 1 - 5:

Tests 6 - 9:

Tests 10 - 14:

Tests 15 - 19:

Tests 20 - 23:

Tests 24 - 25:

SYMPTOM
P1683 - SPEED CONTROL POWER RELAY OR S/C 12V DRIVER CIRCUIT

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

WHEN MONITORED
With the ignition key ON and the speed control switched ON.

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

POSSIBLE CAUSES
- Ground circuit at S/C servo connector open
- S/C wiring harness intermittent problem (S/C vacuum solenoid actuation)
- S/C vacuum solenoid control circuit open
- S/C vacuum solenoid control circuit short to ground
- S/C vent solenoid control circuit open
- S/C vent solenoid control circuit short to ground
- S/C wiring harness intermittent problem (S/C vent solenoid actuation)
- S/C wiring harness observable problem
- S/C power supply circuit open
- S/C power supply circuit shorted to ground
- S/C servo (12 volt driver circuit)
- S/C servo (12 volt driver circuit)
- Brake switch
- Brake switch out of adjustment
- S/C brake switch output circuit open
- S/C brake switch output circuit shorted to ground
- PCM defective
- PCM defective (12 volt driver circuit)
- PCM defective