B263A
DTC B263A
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 B263A 02
- Exterior Illumination Lamp Circuit Short to Ground
DTC B263A 04
- Exterior Illumination Lamp Circuit Open
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) supplies battery voltage to the exterior door handles LED backlighting and the LED lighting located under each outside rearview mirror for approach lighting. When the keyless entry transmitter is operated to the lock/unlock functions the exterior door handles LED and the LED lighting located under each outside rearview mirror for approach lighting are commanded ON.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Park lamps ON.
Conditions for Setting the DTC
DTC B263A 02
The BCM detects a short to ground in the exterior courtesy lamps control circuit.
DTC B263A 04
The BCM detects an open/high resistance in the exterior courtesy lamps control circuit.
Actions Taken When the DTC Sets
The BCM will disable the exterior courtesy lamps control circuit.
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
Description and Operation
Interior Lighting Systems Description and Operation Interior 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
Note: Each component may need to be disconnected to isolate a short to voltage, short to ground, or an open/high resistance. Use the schematics to identify the following:
* Exterior courtesy lamps the vehicle is equipped with
* Each component's control and ground circuit terminals
* Component locations on the exterior courtesy lamps control circuit
1. Ignition OFF, all doors closed, all accessories OFF, disconnect the harness connector at the inoperative component. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 15 ohms between the appropriate ground circuit terminal listed below and ground.
* A9A outside rearview mirror - driver terminal 5
* A9B outside rearview mirror - passenger terminal 5
* B27D door handle switch - driver exterior terminal 4
* B27P door handle switch - passenger exterior terminal 4
* B27LR door handle switch - left rear exterior terminal 4
* B27RR door handle switch - right rear exterior terminal 4
• If 15 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 15 ohms
3. Connect a test lamp between the appropriate control circuit terminal listed below and ground.
* A9A outside rearview mirror - driver terminal 17
* A9B outside rearview mirror - passenger terminal 17
* B27D door handle switch - driver exterior terminal 5
* B27P door handle switch - passenger exterior terminal 5
* B27LR door handle switch - left rear exterior terminal 5
* B27RR door handle switch - right rear exterior terminal 5
4. Verify the test lamp turns ON and OFF when commanding the Exterior Courtesy Lamps ON and OFF with a scan tool.
• If the test lamp is always OFF
1. Ignition OFF, disconnect the X7 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 X7 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 component with inoperative component.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Outside Rearview Mirror Courtesy Lamp Replacement Outside Rearview Mirror Courtesy Lamp Replacement
* Front Side Door Outside Handle Replacement Front Side Door Outside Handle Replacement
* Rear Side Door Outside Handle Replacement Rear Side Door Outside Handle Replacement
* Control Module References Control Module References for BCM replacement, programming, and setup