P0581

Test 1 - 2:

Test 3 - 4:

SYMPTOM
P0581-SPEED CONTROL SWITCH #1 HIGH

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

SET CONDITION
The PCM detects an open or short to voltage in the Speed Control Switch Signal circuit. One Trip Fault.

POSSIBLE CAUSES
- Speed control switch voltage high
- Speed control switches
- (V37) S/C switch signal circuit shorted to battery voltage
- (K4) sensor ground open
- PCM