B2525

DTC B2525

Circuit Description

The fog lamp relay is energized by the fog lamp switch only when the body control module (BCM) has activated the fog lamp enable circuit that supplies the fog lamp switch. The BCM will only activate the fog lamp enable circuit if the following conditions exist:

* The ignition switch must be in the RUN position.
* The headlamp switch must be in the park or headlamp ON position.
* The headlamp dimmer switch must be in the low beam position.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B2525 Front Fog Lamp Enable Circuit

Conditions for Running the DTC

The BCM must be commanding the fog lamp relay to energize.

Conditions for Setting the DTC

* The fault code will set when the fog lamp enable circuit is active and a short to battery positive voltage, an open or a short to ground is present.
* The condition above must be present for more than 0.3 seconds.
* If the short to battery positive voltage is on the output side of the fog lamp switch, the fault will only set when the fog lamp switch is in the ON position.

Action Taken When the DTC Sets

The BCM stores DTC B2525 in memory.

Conditions for Clearing the DTC

* A current DTC B2525 will clear if the short to battery positive voltage, a short to ground or an open in the fog lamp enable circuit is no longer detected by the BCM.
* A history DTC B2525 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
* The BCM receives a clear code command from the scan tool.

Diagnostic Aids

* If the DTC B2525 is a history DTC, the fault may be intermittent. refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
* The following conditions may cause an intermittent malfunction to occur:

- An intermittent short to battery positive voltage, a short to ground or an open in the fog lamp enable circuit.
- The fog lamp relay coil is intermittently shorted to battery.
- The BCM is intermittently shorted to battery positive voltage, shorted to ground or an open.

Test

Step 1 - Step 8:

Step 9 - Step 15: