Chrysler 300M 2002 Service Manual page 2718

Symptom:
P2503-CHARGING SYSTEM VOLTAGE LOW
When Monitored and Set Condition:
P2503-CHARGING SYSTEM VOLTAGE LOW
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.
B+ CIRCUIT HIGH RESISTANCE
GENERATOR GROUND HIGH RESISTANCE
GENERATOR OPERATION
INTERMITTENT CONDITION
GENERATOR FIELD GROUND CIRCUIT OPEN
GENERATOR FIELD CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND
GENERATOR FIELD CONTROL CIRCUIT OPEN
PCM
TEST
1 NOTE: Inspect the vehicle for aftermarket accessories that may exceed the
Generator System output.
Turn the ignition off.
NOTE: The battery must be fully charged.
NOTE: The Generator belt tension and condition must be checked before
continuing.
Start the engine.
Allow the idle to stabilize.
With the DRBIII , read the Target Charging Voltage.
Is the Target Charging Voltage above 15.1 volts?
Yes → Go To 2
→ Go To 3
No
POSSIBLE CAUSES
ACTION
289
DRIVEABILITY - NGC
APPLICABILITY
All