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 B2615 00: Passenger Compartment Dimming 2 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+, BCM X4 Terminal 2 | B2615 00 | B2615 00 | -- | -- |
Courtesy Lamps Supply Voltage | B2615 00 | 2 | 1 | -- |
Right Front Turn Signal Lamp Supply Voltage | B2615 00 | 3 | 4 | -- |
1. Courtesy Lamps Always On 2. Courtesy Lamps Inoperative 3. Right Front Turn Signal Inoperative 4. Right Front Turn Signal Always ON | ||||
Circuit/System Description
Battery voltage for the courtesy lamps is supplied at all times, from the CTSY/RF TRN Fuse located in the rear fuse block, to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it then applies voltage through the courtesy lamps supply voltage circuits to the courtesy lamps listed below.
| • | Left and right roof rail courtesy/reading lamps |
| • | Overhead console lamp |
Conditions for Running the DTC
| • | The BCM attempts to illuminate the courtesy lamps. |
| • | Engine ON, the BCM attempts to illuminate the day time running lamps. |
| • | Ignition ON with the right turn signal switch active, the BCM attempts to illuminate the right front turn signal. |
Conditions for Setting the DTC
| • | The BCM detects a short to ground on the courtesy lamp supply voltage circuit. |
| • | The BCM detects a short to ground on the right front turn signal supply voltage circuit. |
Action Taken When the DTC Sets
The BCM will not attempt to activate courtesy lamps or the right front turn signal.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
Ignition ON, command the Courtesy Lamps ON and OFF with a scan tool. The courtesy lamps should turn ON and OFF when changing between commanded states.
Circuit/System Testing
- Ignition OFF, disconnect the X4 harness connector at the BCM.
- Verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
- Ignition OFF, connect the X4 harness connector at the BCM.
- Disconnect the harness connectors at all components fed by the supply voltage circuits listed below.
- Ignition ON, clear the DTC with a scan tool.
- Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
- Reconnect each component one at a time and verify that the DTC does not reset.
| ⇒ | 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 supply voltage circuits listed below for a short to ground. |
| • | Right front turn signal lamp supply voltage terminal 5 X4 |
| • | Courtesy lamp supply voltage terminal 1 X6 |
| • | Courtesy lamp supply voltage terminal 5 X2 |
| • | Right front turn signal lamp supply voltage terminal 5 X4 |
| • | Courtesy lamp supply voltage terminal 1 X6 |
| • | Courtesy lamp supply voltage terminal 5 X2 |
| ⇒ | If the DTC resets, test the supply voltage circuits for a short to ground. If the circuits test normal, replace the BCM. |
| ⇒ | If the DTC resets, test or replace the component responsible for setting the DTC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
