TheIPC monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components and incorrect data may occur when the voltage is out of range.

This DTC shall run only if the IPC has power, ground, and the ignition is not in START mode.

The current DTC will clear when battery voltage is between 8-18 volts for 2 seconds.

Schematic Reference

Starting and Charging Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Charging System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, accessories OFF, measure and record the battery voltage. The voltage should be between 12.6 and 15.0 volts.

1. Ignition OFF, disconnect the harness connectors at the IPC.
2. Test for less than 5 Ω between the ground circuit terminals listed below and ground.

•	Terminal A16

•	Terminal B15

•	Terminal B16

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground.

•	Terminal A23

•	Terminal A24

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the IPC.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for IPC replacement, setup, and programming