B1325

DTC B1325

Circuit Description
The body control module (BCM) monitors the battery voltage through the VBATT1 circuit. Refer to Body Control System Schematics
A type information accompanies the DTC. Refer to DTC Symptom Description in Vehicle DTC Information.

Conditions for Running the DTC
The voltage supplied to the BCM is in the range of 7-26 volts.

Conditions for Setting the DTC
^ DTC B1325 Type 03:
^ The BCM detects a system voltage below 9.0 volts.
^ The above condition is present at least 5 seconds.
^ DTC B1325 Type 07:
^ The BCM detects a system voltage above 18.0 volts.
^ The above condition is present at least 5 seconds.

Action Taken When the DTC Sets
^ The BCM immediately disables all outputs when a high voltage condition was detected, with the exception of GMLAN and Run/Crank relay that are disabled after a 3 minutes delay.
^ The setting of other DTCs is inhibited.

Conditions for Clearing the DTC
^ A current DTC clears when the malfunction is no longer present.
^ A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Diagnostic Aids
^ The following may cause an intermittent:
- A damaged terminal
- A backed out terminal
- A poor terminal tension
- A chafed wire
- A broken wire inside the insulation
^ When diagnosing an intermittent short or an open, manipulate the wire harness while watching the test equipment for changes.