FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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P1595

Tests 672 - 676:




Tests 677 - 680:




Tests 681 - 684:




Tests 685 - 689:




Tests 690 - 694:




Test 695:




SYMPTOM LIST
P-1595 SPEED CTRL SOLENOID CIRCUITS

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, and the SET switch pressed, vehicle in drive gear moving above 25 mph.

SET CONDITION
The powertrain control module actuates the vacuum and vent solenoids, but they do not respond.

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