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DTC B2530

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2530 01: Front Fog Lamps Control Circuit Short to Battery

DTC B2530 02: Front Fog Lamps Control Circuit Short to Ground

DTC B2530 04: Front Fog Lamps Control Circuit Open

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Front Fog Lamps Control

B2530 02

B2530 04

B2530 01

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Circuit/System Description

The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded through a resistor momentarily by pressing the front fog lamp switch. The body control module (BCM) energises the front fog lamp relay by applying ground to the front fog lamp relay control circuit. When the front fog lamp relay is energised, the relay switch contacts close and battery voltage is applied through the front fog lamp fuse to the front fog lamp supply voltage circuit which illuminates the front fog lamps.

Conditions for Running the DTC

Front fog lamps activated.

Conditions for Setting the DTC

B2530 01

The BCM detects a short to voltage on the control circuit.

B2530 02

The BCM detects a short to ground on the control circuit.

B2530 04

The BCM detects an open control circuit.

Action Taken When the DTC Sets

The front fog lamps are inoperative.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Fog Lamps Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, perform the Front Fog Lamps Relay test. The front fog lamps should be ON/OFF.

Circuit/System Testing
  1. Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block - Underhood.
  2. Verify that a test lamp illuminates between terminal 19 (X2) of the X50A Fuse Block - Underhood and ground.
    3. ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace X50A Fuse Block - Underhood.
  3. Connect a test lamp between B+ and control circuit terminal 19 (X2) of the X50A Fuse Block - Underhood.
  4. Ignition ON, perform the Front Fog Lamps Relay test. The test lamp should turn ON and OFF when changing between the commanded states.
    5. ⇒ If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.
    ⇒ If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Relay Replacement : Attached to Wire Harness
    •  Front Compartment Fuse Block Housing Replacement
    •  Control Module References for BCM replacement, setup, and programming
   


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