Body Control System

B210D-BATTERY VOLTAGE LOW

For complete wiring diagram refer to the wiring section.

WHEN MONITORED
With the ignition on.

SET CONDITION
Battery voltage less than 9 volts for more than15 seconds.

POSSIBLE CAUSES
- Resistance in the (a1) battery positive circuit
- Resistance in the generator case ground
- Generator operation
- (K20) generator field control circuit open
- (K20) generator field control circuit shorted to ground
- (Z20) 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.
- Inspect the vehicle for after market accessories that may exceed the Generator System output.
- Make sure the generator drive belt is in good operating condition.
- 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.

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

YES: ENGINE - DIAGNOSIS AND TESTING for the diagnostic test procedure.
NO: Check the above conditions that can cause a low voltage condition. Repair as necessary. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test