P1595

Tests 1 - 6:

Tests 7 - 10:

Tests 11 - 15:

Tests 15 - 19:

Tests 20 - 23:

Tests 24 - 28:

Tests 29 - 33:

Tests 34 - 35:

SYMPTOM
P1595-SPEED CONTROL SOLENOID CIRCUITS

WHEN MONITORED
With the ignition key ON, the speed control switched ON, the SET switch pressed and the vehicle in drive gear moving above 35 MPH.

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

POSSIBLE CAUSES
- S/C power supply circuit shorted to ground
- Ground circuit at S/C servo connector open
- S/C wiring harness intermittent problem (S/C VENT SOL AC)
- 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 VAC SOL AC)
- S/C wiring harness observable problem
- S/C servo (12V driver circuit)
- S/C servo (12V driver circuit)
- S/C power supply circuit open
- Brake switch
- Brake switch out of adjustment
- S/C brake switch output circuit open
- S/C brake switch output circuit shorted to ground
- PCM (12V driver circuit)