B2585

DTC B2585

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2585 01

-
Park Lamps Control Circuit Short to Battery

DTC B2585 02

-
Park Lamps Control Circuit Short to Ground

DTC B2585 04

-
Park Lamps Control Circuit Open

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) supplies the park lamps with voltage when the headlamp switch is in PARK LAMPS position.

Conditions for Running the DTC

* Battery voltage must be between 9-16 V.

* Park Lamps ON.

Conditions for Setting the DTC

B2585 01

The DTC will set when the BCM detects a short to voltage in the park lamp control circuit.

B2585 02

The DTC will set when the BCM detects a short to ground in the park lamp control circuit.

B2585 04

The DTC will set when the BCM detects an open in the park lamp control circuit

Action Taken When the DTC Sets

* When DTC B2585 01 is present, the park lamps will not operate.

* When DTC B2585 02 is present, the park lamps will be ON at all times or will not operate.

* When DTC B2585 04 is present, the park lamps will not operate.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

* A history DTC will clear once 100 consecutive malfunction free ignition cycles have occurred.

Reference Information

Schematic Reference

Exterior Lights Schematics Exterior Lights Schematics

Connector End View Reference

Component Connector End Views Sunshade - Left (DH6)

Description and Operation

Exterior Lighting Systems Description and Operation Exterior Lighting Systems

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X1 at the K9 Body Control Module.

2. Ignition OFF, S30 Headlamp Switch in PARK LAMPS position.

3. Verify a test lamp illuminates between terminal 22 X1 and ground

• If the test lamp does not illuminate, test the control circuit for a short to ground or open/high resistance.

4. Ignition OFF, reconnect the harness connector X1 at the K9 Body Control Module.

5. Ignition OFF, disconnect the harness connector at the S30 Headlamp Switch, switch in AUTO or OFF position.

6. Test for infinite resistance between terminal 3 and terminal 6 at the S30 Headlamp Switch.

• If less than infinite resistance replace the S30 Headlamp Switch.

7. Test for less than 5 ohms between terminal 6 at the harness connector S30 Headlamp Switch and ground.

• If more than 5 ohms, test the ground circuit for an open/high resistance.

8. If all circuit tests normal, replace the K9 Body Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Headlamp Switch Replacement Service and Repair

* Control Module References Control Module References for BCM replacement, programming and setup