Circuit Description
The courtesy lamps supply voltage circuit acts as both of the following components:
| • | An input |
| • | An output |
When one of several switches provides a ground to the courtesy lamps supply voltage circuit through the lamp and its switched ground circuit, the circuit acts as an input. The ground causes the BCM to wake up.
This provides the following functions:
| • | An output. |
| • | Voltage to the courtesy lamps through the courtesy lamps supply voltage circuit. |
When the BCM detects a short to ground on the courtesy lamps supply voltage circuit DTC B0807 will set .
When the BCM battery positive voltage circuit is open DTC B0807 will set .
Conditions for Setting the DTC
| • | The BCM detects a short to ground in the courtesy lamps supply voltage circuit. |
| • | The BCM may only test for this condition when the body control module (BCM) attempts to activate the courtesy lamps. |
| • | The condition is present for more than 0.1 seconds. |
| • | The BCM battery positive voltage circuit which includes the SBM fuse, is open. |
Action Taken When the DTC Sets
| • | DTC B0807 stores in the BCM memory. |
| • | No driver warning message displays for this DTC. |
Conditions for Clearing the DTC
| • | Under all fault conditions, cycle the ignition before changing the DTC from current to history. |
| • | The BCM no longer detects a short to ground. |
| • | The BCM battery positive voltage circuit is no longer open. |
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for a short to ground in the courtesy lamps supply voltage circuit. A short to ground in the courtesy lamps supply voltage circuit may cause the SBM fuse in the fuse block - IP to open.
-
This step tests for a short to ground or an open circuit in the battery positive voltage circuit of the body control module (BCM).
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | |
Test the courtesy lamps supply voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 3 | |
Test the battery positive voltage circuit of the body control module (BCM) for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 4 | |
4 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
5 |
Important:: Perform the setup procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the DTC reset? | Go to Step 2 | System OK |
