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 Descriptors
DTC B2615 00: Passenger Compartment Dimming 2 CircuitDTC B2615 01: Passenger Compartment Dimming 2 Circuit Short to Battery
DTC B2615 02: Passenger Compartment Dimming 2 Circuit Short to Ground
DTC B2615 04: Passenger Compartment Dimming 2 Circuit Open
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
I/P Dimming Voltage Reference | B1395 03, B3600 03 | B1395 03, B2652 00, B3600 03 | B1395 07 | -- |
Courtesy Lamp Voltage Reference | B2615 00, B2615 02 | B2615 00, B2615 04 | B2615 00, B2615 01 | -- |
LED Dimming Voltage Reference | B2610 00, B2610 02 | B2610 00, B2610 04 | B2610 00 , B2610 01 | -- |
LED Indicator Dimming Volage Reference | B2625 00 | B2625 00 | B2625 00 | -- |
Dome Lamp Switch Signal | 2 | 2 | 2 | -- |
Left Front Door Open Switch Signal | 3 | 3 | 3 | -- |
Left Rear Door Open Switch Signal | 4 | 4 | 4 | -- |
Right Front Door Open Switch Signal | 3 | 3 | 3 | -- |
Right Rear Door Open Switch Signal | 4 | 4 | 4 | -- |
Stop Lamp Switch Signal | B1395 03, B3600 03 | -- | -- | -- |
Dome/Reading Lamp Control | B2615 00 | B2615 00 | -- | -- |
Dome/Reading Lamp Supply Voltage | 1 | 1 | -- | -- |
Exterior Lamps Illumination Supply Voltage | 5 | 5 | 5 | -- |
Inadvertent Power Control | 5 | 5 | 5 | -- |
I/P Lamps Dimming Control | B2652 00 | B2652 00 | B2652 00 | -- |
Dome/Reading Lamp Low Control - Driver Door | -- | 1 | -- | -- |
Dome/Reading Lamp Low Control - Passenger Door | -- | 1 | -- | -- |
Exterior Lamps Low Reference | -- | 5 | -- | -- |
I/P Dimmer Switch Ground | -- | 2 | -- | -- |
LH Vanity Mirror Courtesy Lamp Ground | -- | 1 | -- | -- |
Overhead Console Courtesy Lamp Ground | -- | 1 | -- | -- |
Rear Dome Lamp Ground | -- | 1 | -- | -- |
RH Vanity Mirror Courtesy Lamp Ground | -- | 1 | -- | -- |
1. Courtesy Lamps Malfunction 2. Dome Lamp Switch Malfunction 3. Door Open Switch Malfunction - Front 4. Door Open Switch Malfunction - Rear 5. Exterior Lamps Malfunction | ||||
Circuit/System Description
Voltage for the courtesy lamps is supplied from body control module (BCM), driver door switch, and passenger door switch. When a door is opened, a signal is applied to the door module. The door module then applies a message on the low speed GMLAN serial data communication circuit to the BCM to activate the courtesy lamps. The BCM then applies voltage to the courtesy lamps voltage supply circuit and the components on that circuit.
Conditions for Running the DTC
| • | Battery Voltage must be between 9-16 volts. |
| • | The ignition is ON. |
| • | The BCM, driver door switch, and passenger door switch attempt to illuminate the courtesy lamps. |
Conditions for Setting the DTC
The BCM, driver door switch, or passenger door switch detects a short to ground, short to voltage, or open on the courtesy lamp voltage supply circuit.
Action Taken When the DTC Sets
The BCM, driver door switch, and passenger door switch cease attempts to illuminate the courtesy lamps.
Conditions for Clearing the DTC
| • | The conditions for setting the DTC are no longer present. |
| • | A history DTC clears after 100 malfunction-free ignition cycles. |
| • | The BCM receives the clear code command from the scan tool. |
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 harness connector at the inoperative lamp.
- Test for less than 5.0 ohms between the ground circuit terminal and ground.
- Connect a test lamp between the control circuit terminal and the ground circuit terminal.
- Ignition ON, command the Courtesy Lamps Output Control ON and OFF with the scan tool. The test lamp should turn ON and OFF.
- If all circuits test normal, test or replace the inoperative lamp.
| ⇒ | 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.
| • | Control Module References for BCM, driver door switch, and passenger door switch replacement, setup, and programming |
