Circuit Description
CKT 192 is an input to the BCM. The BCM monitors CKT 192 in order to determine if the front fog lamp circuit is low or shorted to ground.
Conditions for Setting the DTC
| • | CKT 192 is low or shorted to ground. |
| • | The system voltage is between 9.0-16.0 volts. |
| • | The above conditions exist for 184 seconds. |
Action Taken When the DTC Sets
| • | The front fog lamps will not operate correctly. |
| • | The front fog lamps will not change state when the park lamps are turned ON and the front fog lamp switch is pressed. |
Conditions for Clearing the MIL/DTC
| • | A current DTC will clear after the next ignition cycle that does not have a fault. |
| • | A history DTC will clear after 100 consecutive ignition cycles without a fault present. |
| • | History and current DTCs may be cleared using a scan tool. |
Diagnostic Aids
| • | Always diagnose the first DTC that is listed on the scan tool. |
| • | Verify that the scan tool displays DTC B2527 as a current code before you perform diagnostics. |
| • | Inspect the fog lamp switch in order to determine if the switch sticks in the ON position. |
| • | Inspect for loose or poor connections at all of the related components. |
| • | Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step determines if the BCM is defective. Other DTCs set when you disconnect the BCM connector.
-
This step determines if one of the following conditions exists:
| • | CKT 192 is short to ground. |
| • | The fog lamp switch is defective. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the BCM Diagnostic System Check? | -- | Go to Step 2 | |
Does the scan tool display B2527 as a current DTC? | -- | Go to Step 6 | Go to Step 3 | |
Does the test lamp light? | -- | Go to Step 4 | Go to Step 5 | |
4 | Locate and repair the short to ground in CKT 192 (ORN) between the fog lamp switch and the BCM. Is the repair complete? | -- | Go to Step 7 | -- |
5 | Replace the fog lamp switch. Is the repair complete? | -- | Go to Step 7 | -- |
6 |
Is the repair complete? | -- | Go to Step 7 | -- |
7 | Clear the DTCs. Is the repair complete? | -- | -- |
