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 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 Lamps Control Circuit Short to Battery
DTC B3867 02
- Right Park Lamps Control Circuit Short to Ground
DTC B3867 04
- Right Park Lamps Control Circuit Open
Diagnostic Fault Information
Circuit/System Description
When the headlamp switch is placed in the HEAD or PARK position, ground is applied to the park lamp switch 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 park lamps control circuit.
DTC B2585 02
The BCM detects a short to ground in the left park lamps control circuit.
DTC B3867 01 and B3867 04
The BCM detects a short to voltage or an open/high resistance in the right park lamps control circuit.
DTC B3867 02
The BCM detects a short to ground in the right park lamps control circuit.
Actions Taken When the DTC Sets
DTC B2585 01
The left park lamps are always ON.
DTC B2585 02 and B2585 04
The left park lamps are always OFF.
DTC B3867 01
The right park lamps are always ON.
DTC B3867 02 and B3867 04
The right park lamps are always OFF.
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 Fuel Pump and Level Sensor Assembly - Primary
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
DTC B2585
1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the appropriate left park lamp.
2. Test for less than 5 ohms between the appropriate ground circuit terminal listed below and ground.
* E4N park/turn signal lamp - left terminal 1
* E2LF side marker lamp - left terminal 2
* E4J park lamp - left front terminal A
* E42L tail lamp assembly - left terminal 1
• If 5 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 5 ohms
3. Connect a test lamp between the appropriate control circuit terminal listed below and ground, ignition ON.
* E4N park/turn signal lamp - left terminal 2
* E2LF side marker lamp - left terminal 1
* E4J park lamp - left front terminal D
* E42L tail lamp assembly - left terminal 3
4. Verify the test lamp turns ON and OFF when commanding the Left Park Lamps ON and OFF with a scan tool.
• If the test lamp is always OFF
1. Ignition OFF, disconnect the X4 harness connector at the K9 body control module.
2. Test for infinite resistance between the control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 body control module.
• If the test lamp is always ON
1. Ignition OFF, disconnect the X4 harness connector at the K9 body control module, ignition ON.
2. Test for less than 1 V between the control circuit terminal and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K9 body control module.
• If the test lamp turns ON and OFF
5. Test or replace the appropriate left park lamp.
DTC B3867
1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the appropriate right park lamp.
2. Test for less than 5 ohms between the appropriate ground circuit terminal listed below and ground.
* E4P park/turn signal lamp - right terminal 1
* E2RF side marker lamp - right terminal 2
* E4K park lamp - right front terminal A
* E42R tail lamp assembly - right terminal 1
• If 5 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 5 ohms
3. Connect a test lamp between the appropriate control circuit terminal listed below and ground, ignition ON.
* E4P park/turn signal lamp - right terminal 2
* E2RF side marker lamp - right terminal 1
* E4K park lamp - right front terminal D
* E42R tail lamp assembly - right terminal 3
4. Verify the test lamp turns ON and OFF when commanding the Right Park Lamps ON and OFF with a scan tool.
• If the test lamp is always OFF
1. Ignition OFF, disconnect the X4 harness connector at the K9 body control module.
2. Test for infinite resistance between the control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 body control module.
• If the test lamp is always ON
1. Ignition OFF, disconnect the X4 harness connector at the K9 body control module, ignition ON.
2. Test for less than 1 V between the control circuit terminal and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K9 body control module.
• If the test lamp turns ON and OFF
5. Test or replace the appropriate right park lamp.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Parking and Turn Signal Lamp Bulb Replacement Service and Repair
* Front Side Marker Lamp Replacement Front Side Marker Lamp Replacement
* Front Side Marker Lamp Bulb Replacement Front Side Marker Lamp Bulb Replacement
* Tail Lamp Replacement - Inboard Tail Lamp Replacement - Inboard
* Tail Lamp Replacement - Outboard Tail Lamp Replacement - Outboard
* Tail Lamp Bulb Replacement Service and Repair
* Control Module References Control Module References for BCM replacement, programming, and setup