B210D-BATTERY VOLTAGE LOW

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on.
Set Condition:
Battery voltage less than 9 volts for more than 15 seconds.

Possible Causes

RESISTANCE IN THE (A1) BATTERY POSITIVE CIRCUIT

RESISTANCE IN THE GENERATOR CASE GROUND

GENERATOR OPERATION

GENERATOR FIELD CONTROL CIRCUIT OPEN

GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND

GROUND CIRCUIT OPEN

PCM

Diagnostic Test

1. CHECK FOR ANY POWERTRAIN CONTROL MODULES DTCS

NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing.

NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output.

NOTE: Make sure the generator drive belt is in good operating condition.

NOTE: Inspect the fuses in the IPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage.

Turn the ignition on.
With the scan tool, read active PCM DTC's.

Does the scan tool display any active PCM DTC's?

Yes

(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) for the diagnostic test procedure.

Check the above conditions that can cause a low voltage condition. Repair as necessary.