B1325
DTC B1325
CIRCUIT DESCRIPTION
The body control module (BCM) monitors the battery voltage through the Battery Voltage Signal circuit. Refer to Body Control System Schematics.
A type information accompanies the DTC. Refer to DTC Symptom Description. DTC Symptom Description
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1325 Device Power 1 Circuit Voltage
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 03
- The BCM detects a system voltage below 9 volts.
- The above condition is present at least 5 seconds.
DTC B1325 07
- The BCM detects a system voltage above 18 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.
TEST
