P2503

Test 1 - 3:

Test 4:

SYMPTOM
P2503-CHARGING SYSTEM OUTPUT LOW

WHEN MONITORED
While the engine is running.

SET CONDITION
The battery voltage exceeds target voltage by more than a calibrated value.

POSSIBLE CAUSES
- Other DTC's Present
- Generator
- Field driver circuit shorted to ground
- ECM
- Intermittent condition