B2532
CIRCUIT DESCRIPTIONThe foglamp relay is controlled by the body control module (BCM). Battery positive voltage is applied to the relay coil when the headlamp switch is in the PARK or HEAD position. The BCM grounds the foglamp relay control circuit in order to turn ON the foglamp relay. When the foglamp relay control circuit opens or becomes shorted to ground without being commanded ON by the BCM, DTC B2532 is set.
CONDITIONS FOR RUNNING THE DTC
^ The ignition switch is in the ON position.
^ The headlamp switch is in the HEAD or PARK position.
CONDITIONS FOR SETTING THE DTC
^ The ignition switch is in the ON position.
^ The headlamp switch is the HEAD or PARK position.
^ The foglamp relay control circuit is open or shorted to ground for 5 seconds.
ACTION TAKEN WHEN THE DTC SETS
^ DTC B2532 is stored in the BCM memory.
^ If the foglamp relay control circuit is shorted to ground, the foglamps are always ON when the headlamps or parklamps are ON.
^ If the foglamp relay control circuit is open, the foglamps are inoperative.
CONDITIONS FOR CLEARING THE DTC
^ The conditions for setting the DTC are no longer present.
^ A history DTC clears after 100 malfunction free ignition cycles.
^ The BCM receives the clear code command from the scan tool.
DIAGNOSTIC AIDS
^ The fog lamps will only illuminate under the following conditions:
- The parklamps or low beam headlamps are ON.
- The highbeam headlamps are OFF.
- The fog lamp switch is the ON position.
^ If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent and Poor Connections in Diagrams.
TEST DESCRIPTION
Steps 1-13:
The number(s) below refer to the step number(s) on the diagnostic table.
2. Listen for an audible click when the foglamp relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the coil side of the fog lamp relay.
4. Verifies that the body control module is providing ground to the foglamp relay.
5. Tests if ground is constantly being applied to the foglamp relay.