B1480

DTC B1480

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.

DTC Descriptor
DTC B1480 02
- Battery Rundown Protection Circuit Short to Ground

Circuit/System Description

With the Ignition OFF, the body control module (BCM) monitors the battery voltage to make sure that the voltage stays within the proper range. If the battery voltage is to low the BCM cuts several electrical circuits depending on the charging condition of the battery.

Conditions for Running the DTC

Ignition is OFF.

Conditions for Setting the DTC

The BCM detects a low battery voltage.

Action Taken When the DTC Sets

The BCM cuts several electrical circuits depending on the charging condition of the battery.

Conditions for Clearing the DTC

The condition for setting the DTC is not longer present.

Reference Information
Schematic Reference

Exterior Lights Schematics (Exterior Lights Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Exterior Lighting Systems Description and Operation (Exterior Lighting Systems Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing For Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information

Circuit/System Verification

1. Engine running, accessories OFF, measure and record the voltage at the C1 Battery terminals. The voltage must be between 12.6-15.0 V.

• If not within the specified range, refer to Charging System Test (Charging System Test).

2. Ignition OFF, measure and record the voltage at the C1 Battery terminals. The voltage must be between 12.45-12.75 V.

• If not within the specified range, refer to Battery Inspection/Test (Battery Inspection/Test).

3. Clear DTCs and verify the DTC B1480 does not reset.

• If the DTC resets, replace the K9 BCM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning)for BCM replacement, setup and programming