Circuit Description
The inadvertent power circuit acts as both of the following components:
| • | An input |
| • | An output |
When one of several switches provides a ground to CKT 1732, terminal D1 acts as an input. The ground causes the SBM to wake up.
Terminal D1 provides the following functions:
| • | An output |
| • | Voltage to the courtesy lamps through CKT 1732 |
A DTC is set when the SBM detects a short to ground In CKT 1732.
Conditions for Setting the DTC
| • | The SBM detects a short to ground in CKT 1732. |
| • | The SBM only tests for this condition when the SBM attempts to activate the courtesy lamps. |
| • | The condition is present for more than 0.1 seconds. |
Action Taken When the DTC Sets
| • | DTC B0807 stores in the SBMs memory. |
| • | No driver warning message is displayed. |
Conditions for Clearing the DTC
| • | Under all fault conditions, the ignition must cycle before the DTC will change from current to history. |
| • | The SBM no longer detects a short to ground. |
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition is no longer present. |
Diagnostic Aids
An intermittent short to ground in CKT 1732 may cause an intermittent malfunction to occur.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Always perform the SBM Diagnostic System Check before attempting to diagnose a DTC B0807.
-
This step determines if there is a short to ground in CKT 1732.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the Body Control Module Diagnostic System Check performed? | -- | Go to Step 2 | ||
Is the resistance within the specified range? | 0-5 ohms | Go to Step 3 | Go to Step 4 | |
3 | Repair the short to ground in CKT 1732. Did you complete the repair? | -- | Go to Step 5 | -- |
4 |
Did you complete the repair? | -- | Go to Step 5 | -- |
5 |
Did you complete the repair? | -- | -- |
