P1597

Test 1 - 3:

Test 4 - 5:

SYMPTOM
P1597-SPEED CONTROL SWITCH ALWAYS LOW

WHEN MONITORED
With the ignition key on. Battery voltage above 10 volts.

SET CONDITION
When switch voltage is less than 0.43 volts for 2 minutes.

POSSIBLE CAUSES
- Speed control switch voltage low
- Speed control on/off switch
- Speed control resume/accel switch
- (V37) speed control switch signal circuit shorted to (Z123) ground circuit
- PCM