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: Passenger Compartment Dimming 2 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Dome/Reading Lamp Control | B2615 00 | B2615 00 | B2615 00 | -- |
Dome/Reading Lamp Supply Voltage | 1 | 1 | -- | -- |
Dome Lamp Switch Signal | 2 | 2 | 2 | -- |
Exterior Lamps Illumination Supply Voltage | 3 | 3 | 3 | -- |
I/P Dimmer Switch Ground | -- | 2 | -- | -- |
LH Vanity Mirror Courtesy Lamp Ground | -- | 4 | -- | -- |
Overhead Console Courtesy/Reading Lamp Ground | -- | 4 | -- | -- |
Rear Dome Lamp Ground | -- | 1 | -- | -- |
RH Vanity Mirror Courtesy Lamp Ground | -- | 4 | -- | -- |
| ||||
Circuit/System Description
The courtesy lamps include the reading lamps, cargo lamp, and dome lamps. The cargo lamp and dome lamps may be manually turned ON or OFF by placing the interior lamp switch in the ON or OFF position. When the driver places the dome lamp defeat switch in the OFF position, these courtesy lamps will be disabled. If a door is opened, the courtesy lamps illuminate. After all the doors have been closed, the courtesy lamps will remain illuminated approximately 15 seconds after the last door closes. The courtesy lamps will also turn ON prior to any door being opened and will remain illuminated approximately 40 seconds when the driver removes the ignition key. The body control module (BCM) will immediately turn OFF the courtesy lamps if a door lock command is received with all of the doors closed, or if the ignition switch is turned to either the ON or RUN position.
Conditions for Running the DTC
The battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
| • | The TBC 3 fuse battery supply circuit to the BCM is open or shorted to ground. |
| • | The courtesy lamp supply voltage circuit is shorted to ground, shorted to voltage, or open. |
Action Taken When the DTC Sets
The courtesy/dome lamps will be inoperative or always on.
Conditions for Clearing the 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. |
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 Testing
- Ignition OFF, disconnect the BCM connector X3.
- Verify that a test lamp illuminates between the B+ circuit terminal B4 and ground.
- Disconnect the inoperative courtesy lamp connector.
- Test for less than 5.0 ohms between the ground circuit terminal B and ground.
- Connect a test lamp between the control circuit terminal A and the ground circuit terminal B.
- Doors closed, turn the courtesy lamp switch ON and OFF. The test lamp should turn ON and OFF when changing between the commanded states.
- If the circuits test normal, replace the courtesy lamp.
| ⇒ | 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 courtesy lamp supply circuit terminal B3 for a short to ground. |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Dome and Reading Lamp Bulb Replacement
Control Module References for BCM replacement, programming, and setup.
