P2509

Test 1 - 3:

Test 4 - 7:

SYMPTOM
P2509-POWERDOWN DATA LOST ERROR

WHEN MONITORED
Continuous - key on or key off.

SET CONDITION
Loss of voltage detected at the ECM for a calibrated amount of time.

POSSIBLE CAUSES
- Poor connections at the batteries
- Low battery voltage
- Open fused B+ to ECM
- Open ground circuit
- Battery + shorted to other circuits
- Return circuit shorted
- Battery + shorted to ground
- Intermittent condition