P1595

Test 1:

Tests 2 - 6:

Tests 7 - 10:

Tests 11 - 15:

Tests 16 - 19:

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 35 mph.

SET CONDITION
The Powertrain Control Module actuates the vacuum and vent solenoids but they do not respond.

POSSIBLE CAUSES
- S/C brake switch output circuit open
- S/C brake switch output circuit shorted to ground
- S/C ground circuit open
- S/C power supply circuit open
- S/C servo
- Brake switch
- Brake switch out of adjustment
- S/C vacuum solenoid control circuit short ground
- S/C vent solenoid control circuit short ground
- S/C vacuum solenoid control circuit open
- S/C vent solenoid control circuit open
- S/C wiring harness intermittent defect (S/C vacuum)
- Powertrain Control Module
- S/C wiring harness intermittent defect (S/C vent)
- S/C wiring harness observable defect