• | 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 |
---|---|---|---|---|
Courtesy Lamp High Control | B2555 00 | 1 | B2555 00 | -- |
1. Courtesy Lamps Inoperative |
The CTSY fuse in the I/P fuse block supplies B+ to the body control module (BCM). When the BCM receives a door open signal and the courtesy defeat switch is not active, the BCM supplies B+ to the courtesy lamps. The courtesy lamps are grounded at G302, G401, and G402.
Battery voltage must be between 9-16 volts.
• | DTC B2555 00 will set when the BCM detects a short to voltage in the courtesy lamp control circuit. |
• | DTC B2555 00 will set when the BCM detects a short to ground in the courtesy lamp control circuit. |
DTC B2555 00 is present, when a short to ground or short to voltage on the courtesy lamp control circuit is present.
• | The condition responsible for setting the DTC no longer exists. |
• | A history DTC will clear once 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 illuminates, locate and repair a short to voltage in the courtesy lamp high control circuit. |
⇒ | If the test lamp does not illuminate, locate and repair a short to ground in the courtesy lamp high control circuit. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming