DTC P2503-Charging System Output Low: Notes
For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article.
- When Monitored:
The engine running. The engine speed greater than 1157 RPM.
- Set Condition:
The battery sensed voltage is 1 volt below the charging goal for 13.47 seconds. The PCM senses the battery voltage turns off the field driver and senses the battery voltage again. If the voltages are the same, the code is set. One Trip Fault. Three good trips to turn off the MIL.
| Possible Causes |
|---|
| EXCESSIVE RESISTANCE IN THE (A1) BATTERY POSITIVE CIRCUIT |
| EXCESSIVE RESISTANCE IN THE CASE GROUND |
| (K20) GEN FIELD CONTROL CIRCUIT SHORTED TO VOLTAGE |
| (K20) GEN FIELD CONTROL CIRCUIT OPEN |
| (K20) GEN FIELD CONTROL CIRCUIT SHORTED TO GROUND |
| (Z20) GEN GROUND CIRCUIT OPEN |
| GENERATOR |
| PCM |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.