B2532
DTC B2532 or B2533
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2532 00
- Front Fog Lamps Control Circuit Low
DTC B2533 00
- Front Fog Lamps Control Circuit High
Diagnostic Fault Information
Circuit/System Description
The front fog lamp relay and front fog lamps are grounded at G105 at all times. When the body control module (BCM) is momentarily grounded when the front fog lamp switch is turned to the ON position. Battery voltage is then supplied to the coil side of the front fog lamp relay. The relay contacts now close supplying the front fog lamps with battery voltage turning them ON.
Conditions for Running the DTC
The battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
B2532
When the BCM receives a front fog lamp switch ON command and the front fog lamp relay control circuit is shorted to ground.
B2533
When the BCM receives a front fog lamp switch OFF command and the front fog lamp relay control circuit is shorted to voltage.
Action Taken When the DTC Sets
The front fog lamps will not operate or will remain ON at all times.
Conditions for Clearing the DTC
* This DTC will clear on current status after the condition for setting the fault is corrected.
* A history DTC will clear after 100 consecutive ignition cycles without a fault present.
Reference Information
Schematic Reference
Fog Lights Schematics (Fog Lights Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Exterior Lighting Systems Description and Operation (Exterior Lighting Systems Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
Front Fog Lamp Relay Control Circuit Test
1. Ignition OFF, disconnect the front fog lamp relay.
2. Verify a test lamp illuminates between the relay coil ground circuit terminal 86 and B+.
• If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the relay coil control circuit terminal 85 and the ground circuit terminal 86.
4. Ignition ON, command the front fog lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, test or replace the front fog lamp relay.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (Relay Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (Relay Replacement (Within an Electrical Center))
* Control Module References (Programming and Relearning) for BCM replacement, programming, and setup.