Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B1480 00 : Battery Rundown Protection CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+, BCM X3 terminal 2 | B1480 00 | B1480 00 | -- | -- |
Inadvertent Power Courtesy Lamp | B1480 00 | 1 | -- | -- |
Ground | -- | 1 | -- | |
1. Inadvertent courtesy lamps inoperative | ||||
Battery voltage is supplied at all times to the body control module (BCM) from the 15A INT LTS/PNL DIM fuse located in the underhood fuse block. The BCM then applies this voltage to the following lamps:
| • | Dome/Reading Lamp |
| • | Vanity Mirror Lamps |
| • | Reading Lamp Assembly |
| • | Inside Rearview Mirror |
| • | Rear Compartment Courtesy Lamp |
In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamps supply voltage circuit to prevent a total battery discharge condition.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The BCM detects a short ground on the inadvertent power courtesy lamp circuit.
Action Taken When the DTC Sets
The BCM will deactivate inadvertent power to the courtesy lamps.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Connector End View Reference
Lighting Systems Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, disconnect the C3 harness connector at the BCM.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
- If all circuits test normal, replace the BCM.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuit and components listed below for a short to ground. If all circuits and components test normal, replace the BCM. |
BCM C2 Harness Connector Terminal 1
| • | Dome/Reading Lamp |
| • | Left Vanity Mirror Lamp |
| • | Right Vanity Mirror Lamp |
| • | Reading Lamp Assembly |
| • | Inside Rearview Mirror Lamp |
| • | Rear Compartment Courtesy Lamp |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
