GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Impala 🢒 Body 🢒 Lighting Systems 🢒 DTC B2615

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 Circuit

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

BCM B+ C4 Pin-2

B2615 00

B2615 00

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--

Courtesy Lamp Voltage Supply

B2615 00

1

1

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1. Courtesy lamps malfunction

Circuit/System Description

Battery voltage for the courtesy lamps is supplied at all times, from the INT LIGHTS Fuse located in the underhood fuse block, to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it applies voltage through the courtesy lamps supply voltage circuits to the courtesy lamps listed below.

    • The left and right I/P courtesy lamps
    • Dome lamp

Conditions for Running the DTC
    • The ignition is ON
    • The courtesy lamps must be commanded ON.

Conditions for Setting the DTC

The BCM detects a short to ground on the courtesy lamp supply voltage circuit.

Action Taken When the DTC Sets

The BCM will deactivate the courtesy lamps.

Conditions for Clearing the DTC
    • The condition responsible for setting the DTC no longer exists.
    • A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Interior Lights Dimming Schematics

Connector End View Reference

Lighting Systems Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

    •  Scan Tool Output Controls
    •  Scan Tool Data List
    •  Scan Tool Data Definitions

Circuit/System Verification

Ignition ON, command the Courtesy Lamps ON and OFF with the scan tool. The interior courtesy lamps should turn ON and OFF when changing between commanded states.

Circuit/System Testing
  1. Ignition OFF, disconnect the (C4) harness connector at the BCM.
  2. Verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    3. ⇒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.
    • Courtesy lamp supply voltage terminal 5 C2
    • Courtesy lamp supply voltage terminal 1 C6
  3. Ignition OFF, connect the (C4) harness connector at the BCM.
  4. Disconnect the harness connectors at all components fed by the courtesy lamp supply voltage circuits listed below.
    5. • Courtesy lamp supply voltage terminal 5 C2
    • Courtesy lamp supply voltage terminal 1 C6
  5. Ignition ON, clear the DTC with a scan tool.
  6. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
    7. ⇒If the DTC resets, test the supply voltage circuits for a short to ground. If the circuits test normal, replace the BCM.
  7. Reconnect each component one at a time and verify that the DTC does not reset.
    8. ⇒ 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.

    •  Dome Lamp Replacement
    •  Instrument Panel Courtesy Lamp Bulb Replacement
    •  Control Module References for BCM replacement, setup, and programming