• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
BCM Supply Voltage | B1480 00 | B1480 00 | -- | -- |
12-Volt Reference | B1480 00 | 1 | -- | -- |
Inadvertent Lamps Ground | -- | 1 | -- | -- |
1. Inadvertent Lamps Malfunction |
Battery voltage is applied at all times to the body control module (BCM) from the BCM 2 fuse located in the underhood fuse block. The BCM then applies this voltage to the following lamps:
• | Underhood lamp |
• | Front reading lamps |
• | Middle reading lamps |
• | Rear reading lamp |
• | 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.
Battery voltage must be between 9-16 volts.
The BCM detects a short ground on the inadvertent power courtesy lamp circuit.
The BCM will deactivate the inadvertent voltage to the courtesy lamps.
• | The condition responsible for setting the DTC no longer exists. |
• | A history DTC will clear once the 100 consecutive malfunction free ignition cycles have occurred. |
Interior Lighting Systems Description and Operation
Control Module References for scan tool information
⇒ | 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. |
• | Underhood Lamp |
• | Front Courtesy/Reading Lamp |
• | Middle Courtesy/Reading Lamp |
• | Rear Courtesy/Reading Lamp |
• | Left Sunshade Lamp |
• | Right Sunshade Lamp |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |