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DTC B2585 or B3867

DTC B2585 or B3867

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 has overviews of all diagnostic categories.


DTC Descriptors

DTC B2585 02

Left Park Lamps Control Circuit Short to Ground

DTC B3867 02

Right Park Lamp Control Circuit Short to Ground

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Park Lamps Control

B2585 02

1

-

-

Right Park Lamps Control

B3867 02

1

1

-

1. Park lamps inoperative



Circuit/System Description

The body control module (BCM) energizes the front and rear park lamps by applying voltage to the park lamp control circuit. When the park lamp control circuit is energized the park lamps are illuminated.

Conditions for Running the DTC

Headlamp switch in park or low beam position.

Conditions for Setting the DTC

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

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Exterior Lights 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 information on diagnostic tools

Circuit/System Verification

Ignition ON, perform the appropriate Front Park Lamp test. The appropriate park lamps should turn ON/OFF.

Circuit/System Testing


1. Ignition OFF, remove the appropriate park lamp bulb and inspect.

2. If bulb is faulty, replace bulb.

3. Disconnect the harness connector at the appropriate headlamp assembly or tail lamp assembly.

4. Test for less than 5 Ω between the appropriate lamp assembly ground circuit harness connector listed below and ground.

• E13L Headlamp Assembly - Left ground circuit harness connector terminal 1

• E13R Headlamp Assembly - Right ground circuit harness connector terminal 1

• E5E Tail Lamp - Left ground circuit harness connector terminal F

• E5F Tail Lamp - Right ground circuit harness connector terminal F

5. If greater than the specified range, test the ground circuit for an open/high resistance.

6. Connect a test lamp between the appropriate park lamp control circuit harness connector listed below and ground.

• E13L Headlamp Assembly - Left control circuit harness connector terminal 4

• E13R Headlamp Assembly - Right control circuit harness connector terminal 4

• E5E Tail Lamp - Left control circuit harness connector terminal A

• E5F Tail Lamp - Right control circuit harness connector terminal A

7. Command the appropriate Park Lamp test with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

8. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

9. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 Body Control Module.

10. If all the circuits and bulbs test normal, replace the appropriate headlamp assembly or tail lamp assembly.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Headlamp Bulb Replacement (Xenon - Left Side) Headlamp Bulb Replacement (Xenon - Right Side) Headlamp Bulb Replacement (High Beam) Headlamp Bulb Replacement (Low Beam)

• Headlamp Replacement

• Tail Lamp Bulb Replacement

• Tail Lamp Replacement

• Control Module References for information on BCM replacement, setup, and programming