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 C4 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 | -- |
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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
Lighting Systems Connector End Views
Electrical Information Reference
Scan Tool Reference
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 (C4) harness connector at the BCM.
- Verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
- Ignition OFF, connect the (C4) harness connector to 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 C4 |
| • | Courtesy lamp supply voltage terminal 1 C6 |
| • | Courtesy lamp supply voltage terminal 5 C2 |
| • | Right front turn signal lamp supply voltage terminal 5 C4 |
| • | Courtesy lamp supply voltage terminal 1 C6 |
| • | Courtesy lamp supply voltage terminal 5 C2 |
| ⇒ | 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 |
