B1480

DTC B1480

DTC DESCRIPTOR

DTC B1480 00

Battery Rundown Protection

DIAGNOSTIC FAULT INFORMATION






IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

CIRCUIT/SYSTEM DESCRIPTION
Voltage is applied to the body control module (BCM) from the Interior Lights fuse. The BCM then applies voltage to the following lamps:
- I/P compartment lamp
- Overhead Console lamps
- Rear compartment lamp
- Rear roof rail lamps
- Vanity mirror lamps
In the event that any of these lamps were to remain illuminated for more the 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamps circuit to prevent total battery discharge.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
The BCM receives a ground signal on the inadvertent power courtesy lamp circuit.

ACTION TAKEN WHEN THE DTC SETS
The inadvertent power courtesy lamps do not illuminated.

CONDITIONS FOR CLEARING THE DTC
The BCM clears this code from current when the fault is removed from the system.

Circuit/System Verification
Ignition ON, activate each inadvertent power courtesy lamp. Ignition OFF. Activate each inadvertent power courtesy lamp. Lamps should remain illuminated for more the 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamps circuit to prevent total battery discharge.

Circuit/System Testing
1. Clear the DTC. Disconnect all the inadvertent power courtesy lamps related components. Verify the DTC B1480 does not set
- If the DTC resets then test for a short to ground in the inadvertent power courtesy lamps circuit. If the circuit/connections test normal replace the BCM.

2. Reconnect each component one at a time and test for the DTC B1480. If the DTC resets then replace that component.

Repair Instructions

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

- Instrument Panel Compartment Lamp Switch Replacement
- Courtesy Lamp Replacement - Rear Quarter
- Courtesy Lamp Switch Replacement - Rear Quarter
- Vanity Mirror Lamp Replacement
- Control Module References for BCM replacement, setup, and programming Programming and Relearning