P1595

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 11:

Tests 12 - 15:

Tests 16 - 19:

Tests 20 - 24:

Tests 25 - 27:

SYMPTOM
P1595 - SPEED CONTROL 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 open
- S/C brake switch output circuit open
- S/C power supply circuit open
- Switched S/C power supply circuit shorted to ground
- S/C servo defective (12 volt driver circuit)
- S/C vacuum solenoid control circuit open
- S/C vacuum solenoid control circuit shorted to ground
- S/C vent solenoid control circuit open
- S/C vent solenoid control circuit shorted to ground
- S/C wiring harness intermittent defect (S/C vent solenoid actuation)
- S/C wiring harness intermittent defect (S/C vacuum solenoid actuation)
- S/C wiring harness observable defect
- Brake switch defective
- PCM defective (12 volt driver circuit)