Without RPO Code YF7

DTC B2615 (WITHOUT RPO CODE YF7)

CIRCUIT DESCRIPTION
The body control module (BCM) receives a ground signal from the door jamb, or courtesy lamp switch requesting courtesy/dome lamp illumination. When this occurs, the BCM directly sends a voltage through the courtesy lamp supply voltage circuit illuminating the courtesy/dome lamps. Voltage for the courtesy lamp supply voltage circuit as well as the backup lamp supply voltage circuit is from the body fuse block TBC 2 fuse directly through the BCM to these circuits.

CONDITIONS FOR RUNNING THE DTC
The battery voltage must be between 9.0-16.0 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 open before the first connection after the BCM or shorted to voltage.
- There is a loss of the body fuse block TBC 2 battery supply voltage to the BCM for 1 second.

ACTION TAKEN WHEN THE DTC SETS
The courtesy dome 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.
- An open circuit up to the first splice only in the courtesy lamp supply voltage circuit from the BCM, will set the DTC.
- A short to ground in the following circuits will cause the TBC 2 fuse to open.
- Courtesy lamp supply voltage.
- Backup lamp supply voltage.
- Battery positive voltage from the body fuse block TBC 2 fuse.

TEST DESCRIPTION

Steps 1-2:

Steps 3-7:

The numbers below refer to the step numbers on the diagnostic table.
2. This step test determines if the problem is a short to ground in the wiring.
3. This step test determines if the problem exists in the wiring or the BCM.
4. This step test determines if the problem exists in the wiring or the BCM.
6. After replacement of the BCM you must calibrate the new module for proper operation.