P1595

Tests 1 - 4:

Tests 5 - 9:

Tests 10 - 14:

Tests 15 - 16:

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
- Ground circuit open
- Intermittent condition
- S/C brake switch output circuit
- Speed control switch output open
- Brake lamp switch
- Speed control power supply circuit
- PCM (S/C power supply)
- Speed control vacuum solenoid
- Speed control vacuum solenoid control circuit open
- PCM (Vacuum solenoid)
- Speed control vacuum solenoid control circuit shorted to ground
- Speed control vent solenoid
- Speed control vent solenoid control circuit open
- Speed control vent solenoid control circuit shorted to ground
- PCM (vent solenoid)