B2585

DTC B2585 or B3867

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
- Left Park Lamp Control Circuit Short to Battery

DTC B2585 02
- Left Park Lamp Control Circuit Short to Ground

DTC B2585 04
- Left Park Lamp Control Circuit Open

DTC B3867 01
- Right Park Lamp Control Circuit Short to Battery

DTC B3867 02
- Right Park Lamp Control Circuit Short to Ground

DTC B3867 04
- Right Park Lamp Control Circuit Open

Diagnostic Fault Information





Circuit/System Description

The body control module (BCM) energizes the 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

B2585 01

Headlamp switch in OFF position.

B2585 02 or B2585 04

Park lamps are switched ON.

B3867 01, B3867 02 or B3867 04

Park lamps are switched ON.

B3867 02

Headlamp switch in park or low beam position.

Conditions for Setting the DTC

B2585 01 or B3867 01

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

B2585 02 or B3867 02

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

B2585 04 or B3867 04

The BCM detects an open circuit on the appropriate park lamp control circuit.

Action Taken When the DTC Sets

No action taken by the BCM.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information
Schematic Reference

Exterior Lights Schematics (Exterior Lights Schematics)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
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 (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, turn the park lamps ON and OFF by turning the headlamp switch between the OFF and PARK positions. The park lamps should turn ON and OFF when changing between the selected states.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate park lamp.
2. Test for less than 5 ohm between the ground circuit terminal listed below and ground:

* E13 Headlamp - terminal 1
* E42 Tail Lamp Assembly - terminal F
* E7 License Lamp - terminal 2

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

3. Connect a test lamp between the control circuit terminal listed below and ground:

* E13 Headlamp - park lamp - terminal 4
* E13 Headlamp - side marker lamp - terminal 7
* E42 Tail Lamp Assembly - terminal A
* E7 License Lamp - terminal 1

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

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
• 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 BCM.

5. If all the circuits test normal, replace the park lamp.

Repair Instructions

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

* Headlamp Replacement (Headlamp Replacement)
* Headlamp Bulb Replacement (TT4 Low Beam) (Headlamp Bulb Replacement (TT4 Low Beam))Headlamp Bulb Replacement (TT4 High Beam ) (Headlamp Bulb Replacement (TT4 High Beam ))
* Tail Lamp Replacement (Hatchback, Sedan) (Service and Repair)
* Tail Lamp Bulb Replacement (Service and Repair)
* Rear License Plate Lamp Replacement (Hatchback, Sedan) (Rear License Plate Lamp Replacement)
* Rear License Plate Lamp Bulb Replacement (Rear License Plate Lamp Bulb Replacement)
* Control Module References (Programming and Relearning) for BCM replacement, programming and setup