P1683

Tests 672 - 676:

Tests 677 - 680:

Tests 681 - 684:

Tests 685 - 689:

Tests 690 - 694:

Test 695:

SYMPTOM LIST
P-1683 SPEED CONTROL POWER RELAY CIRCUIT

TEST NOTE:
All symptoms listed above are diagnosed using the same tests. The title for the tests will be P-1595 SPEED CTRL SOLENOID CIRCUITS.

WHEN MONITORED
With the ignition key on, 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 brake switch output circuit open
- S/C power supply circuit open
- Switched S/C power supply ckt shorted to ground
- S/C servo defective (12V driver circuit)
- S/C vacuum solenoid control circuit open
- S/C vacuum solenoid control ckt short to ground
- S/C vent solenoid control circuit open
- S/C vent solenoid control ckt short to ground
- S/C wiring harness inter defect (S/C vent sol AC)
- Brake switch defective
- Brake switch out of adjustment
- PCM defective (12V driver circuit)
- S/C wiring harness inter defect (S/C vac sol AC)
- S/C wiring harness observable defect