P0579

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 9:

SYMPTOM
P0579-SPEED CONTROL SWITCH #1 PERFORMANCE

POSSIBLE CAUSES
- Intermittent condition
- Speed control switches
- Speed control switch signal circuit shorted to sensor ground
- Speed control switch signal circuit shorted to ground
- Speed control switch signal circuit shorted to battery voltage
- Speed control switch signal circuit open
- Sensor ground open
- PCM