P1597

Tests 1 - 3:

Tests 4 - 7:

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
- Intermittent condition
- Speed control ON/OFF switch
- Speed control resume/ACCEL switch
- Speed control switch signal circuit shorted to sensor ground
- Speed control switch signal circuit shorted to ground
- PCM