B3867

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 Instructionsprovides 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

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

The park lamps are turned OFF.

B2585 02 or B2585 04

The park lamps are turned ON

B3867 01
* The ignition is turned OFF.
* Headlamp switch in OFF or AUTO position.

B3867 02 or B3867 04

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 control circuit.

B2585 02 or B3867 02

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

B2585 04 or B3867 04

The BCM detects an open control circuit.

Action Taken When the DTC Sets

The park lamps are inoperative.

Conditions for Clearing the DTC

The condition for setting the DTC is not longer present.

Reference Information
Schematic Reference

Exterior Lights Schematics Exterior Lights Schematics

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation

Exterior Lighting Systems Description and Operation Exterior Lighting Systems
Electrical Information Reference

* 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 Referencesfor scan tool information

Circuit/System Verification

Vehicle in Service Mode, perform the appropriate Park Lamp test. The appropriate park lamp should be ON/OFF.

Circuit/System Testing

1. Vehicle OFF, disconnect the harness connector at the appropriate inoperative park lamp.
2. Disconnect the negative terminal of the C1 battery.
3. Test for less than 5 ohm between the appropriate tail lamp ground circuit harness connector listed below and ground.

* E5AA park lamp - lower left harness connector terminal 1
* E5AB park lamp - lower right harness connector terminal 1

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

4. Reconnect the negative terminal to the C1 battery.
5. Connect a test lamp between the appropriate tail lamp control circuit harness connector listed below and ground.

* E5AA park lamp - lower left harness connector terminal 2
* E5AB park lamp - lower right harness connector terminal 2

6. Command the appropriate Tail Lamp test 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.

7. If all the circuits test normal, replace the appropriate inoperative park lamp.

Repair Instructions

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

* Tail Lamp Replacement Tail Lamp Replacement
* Control Module References Control Module Referencesfor BCM control module replacement, programming and setup