When Monitored And Set Conditions
This diagnostic runs continuously when the following conditions are met:
- With the engine running.
- Battery voltage greater than 10.4 volts.
Set Conditions:
- The Powertrain Control Module (PCM) attempts to regulate the Alternator field with no result during monitoring.
Default Actions:
- The MIL light will illuminate.
- If the vehicle is equipped with the stop/start feature, the system will be disabled when this DTC is active.
| Possible Causes |
|---|
| ALTERNATOR FIELD CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE |
| ALTERNATOR FIELD CONTROL CIRCUIT OPEN/HIGH RESISTANCE |
| ALTERNATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND |
| POOR ENGINE BLOCK OR ALTERNATOR CASE GROUND |
| ALTERNATOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .