DTC B2615 Without 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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2615 Passenger Compartment Dimming 2 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 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. Refer to Testing for Intermittent Conditions and Poor Connections . |
| • | 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
The numbers below refer to the step numbers on the diagnostic table.
-
This step determines if the problem is a short to ground in the wiring.
-
This step determines if the problem exists in the wiring or the BCM.
-
This step determines if the problem exists in the wiring or the BCM.
-
After replacement of the BCM, you must calibrate the new module for proper operation.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Interior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||||
Inspect the TBC 2 fuse in the body fuse block. Is the fuse open? | Go to Step 3 | Go to Step 4 | |||||||
Test the following circuits for a short to ground. Refer to Circuit Testing and Wiring Repairs :
Did you find and correct the condition? | Go to Step 7 | Go to Step 5 | |||||||
Test the courtesy lamp supply voltage circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 5 | |||||||
5 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 6 | ||||||
Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | -- | |||||||
7 |
Does the DTC reset? | Go to Step 2 | System OK | ||||||
DTC B2615 With YF7
Circuit Description
The body control module (BCM) receives a ground signal from the door jamb or courtesy lamp switches requesting courtesy/dome lamp illumination. When this occurs, the BCM sends a voltage through the courtesy lamp high control circuit to the courtesy lamp relay, illuminating the courtesy/dome lamps.
Voltage for the courtesy lamp high control 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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2615 Passenger Compartment Dimming 2 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 high control circuit is shorted to ground |
| • | When the BCM is not receiving a courtesy lamp illumination request signal and the courtesy lamp high control circuit is open or shorted to voltage |
| • | When the courtesy lamp relay coil side is open |
| • | 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. Refer to Testing for Intermittent Conditions and Poor Connections . |
| • | A short to ground in the following circuits will cause the TBC 2 fuse to open: |
| - | Courtesy lamp high control |
| - | Backup lamp supply voltage |
| - | Battery positive voltage from the body fuse block TBC 2 fuse |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for an open coil in the courtesy lamp relay.
-
After replacement of the BCM, you must calibrate the new module for proper operation.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Interior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views | |||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||||
2 | Inspect the TBC 2 fuse in the body fuse block. Is the fuse open? | Go to Step 3 | Go to Step 4 | ||||||
3 | Test the following circuits for a short to ground. Refer to Circuit Testing and Wiring Repairs :
Did you find and correct the condition? | Go to Step 9 | Go to Step 6 | ||||||
4 | Test the courtesy lamp high control circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 5 | ||||||
Test the courtesy lamp relay between the ground terminal and the courtesy lamp high control terminal for continuity. Refer to Testing for Continuity . Is continuity present? | Go to Step 6 | Go to Step 7 | |||||||
6 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8 | ||||||
7 | Replace the courtesy lamp relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 9 | -- | ||||||
Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- | |||||||
9 |
Does the DTC reset? | Go to Step 2 | System OK | ||||||
