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 Instructions provides an overview of each diagnostic category.

DTC Descriptors
DTC B2585 01
- Left Park Lamps Control Circuit Short to Battery

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

DTC B2585 04
- Left 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

When the turn signal/multifunction switch is placed in the HEAD or PARK position, ground is applied to the park lamps ON signal circuit to the body control module (BCM). The BCM responds by applying voltage to the park lamps, tail lamps, and license lamps control circuits illuminating the park, tail, and license lamps.

Conditions for Running the DTC

* Battery voltage must be between 9-16 V.
* Park lamps ON.

Conditions for Setting the DTC

DTC B2585 01 and B2585 04
* The BCM detects a short to voltage or an open/high resistance in the left front park lamp control circuit.
* The BCM detects an open/high resistance in the left front park lamp ground circuit.

DTC B2585 02

The BCM detects a short to ground in the left front park lamp control circuit.

DTC B3867 01 and B3867 04
* The BCM detects a short to voltage or an open/high resistance in the right front park lamp control circuit.
* The BCM detects an open/high resistance in the right front park lamp ground circuit.
* The BCM detects a short to ground or an open/high resistance in the F6DR (APO/EXT LIGHTS) fuse B+ circuit.

DTC B3867 02

The BCM detects a short to ground in the right front park lamp control circuit.

Actions Taken When the DTC Sets

DTC B2585 01

The left front park lamp is always ON.

DTC B2585 02 and B2585 04

The left front park lamp is inoperative.

DTC B3867 01

The right front park lamp is always ON.

DTC B3867 02 and B3867 04
* The right front park lamp is inoperative.
* When the F6DR (APO/EXT LIGHTS) fuse is open, the left rear park lamp and right front park lamp are inoperative.

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 vehicle ON/OFF switch cycles have occurred.

Reference Information
Schematic Reference

* Exterior Lights Schematics Exterior Lights Schematics
* Body Control System Schematics [1][2]Body Control Systems

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1
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 Testing

DTC B2585
1. Vehicle OFF, disconnect the harness connector at the E4N park/turn signal lamp - left.
2. Vehicle OFF, exterior lamps OFF, test for less than 5 ohm between the ground circuit terminal 1 and ground.

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

3. Connect a test lamp between the control circuit terminal 2 and ground.
4. Vehicle in Service Mode, command the Left Front 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 circuits test normal, replace the E4N park/turn signal lamp - left.

DTC B3867
1. Vehicle OFF, disconnect the X2 harness connector at the K9 BCM.
2. Verify that a test lamp illuminates between the F6DR (APO/EXT LIGHTS) fuse B+ circuit terminal 3 and ground.

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

3. Reconnect the X2 harness connector at the K9 BCM.
4. Disconnect the harness connector at the E4P park/turn signal lamp - right.
5. Vehicle OFF, exterior lamps OFF, test for less than 5 ohm between the ground circuit terminal 1 and ground.

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

6. Connect a test lamp between the control circuit terminal 2 and ground.
7. Vehicle in Service Mode, command the Right Front 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.

8. If all circuits test normal, replace the E4P park/turn signal lamp - right.

Repair Instructions

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

* Front Turn Signal Lamp Bulb Replacement Front Turn Signal Lamp Bulb Replacement
* Control Module References Programming and Relearning for BCM replacement, setup, and programming