B2615
DTC B2615
Circuit Description
The body control module (BCM) receives a ground signal from the door jamb or courtesy lamp switches requesting courtesy lamp illumination. When this occurs, the BCM directly sends a voltage through the courtesy lamp supply voltage circuit illuminating the courtesy lamps.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2615 Passenger Compartment Dimming 2 (courtesy lamps, etc.) Circuit
Conditions for Running the DTC
The battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
* When the BCM receives a courtesy lamp illumination request signal and the courtesy lamp supply voltage circuit is shorted to ground.
* When the BCM is not receiving a courtesy lamp illumination request signal and the courtesy lamp supply voltage circuit is shorted to voltage.
* There is a loss of the rear fuse block TBC 3 battery supply voltage to the BCM for more than one second.
Action Taken When the DTC Sets
The courtesy lamps will not operate or are always ON.
Conditions for Clearing the MIL/DTC
* This DTC will clear on current status after the condition for setting the fault is corrected.
* A history DTC will clear after 100 consecutive ignition cycles without a fault present.
* History and current DTCs can be cleared using a scan tool.
Diagnostic Aids
Perform a visual inspection for loose or poor connections at all related components. Refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics
Test Description
Step 1 - Step 7:
The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if an open or short to ground exists.
3. This step determines if a short to ground exists in the lamp wiring or internally within the BCM.
4. This test determines if an open exists in the TBC 3 battery positive voltage circuit, the courtesy lamp supply voltage circuit, or internally within the BCM.
6. After replacement of the BCM you must calibrate the new module for proper operation.