B2575
DTC B2575 or B2699
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 B2575 01
- Headlamps Control Circuit Short to Battery
DTC B2575 02
- Headlamps Control Circuit Short to Ground
DTC B2575 04
- Headlamps Control Circuit Open
DTC B2699 01
- Right Headlamp Control Circuit Short to Battery
DTC B2699 02
- Right Headlamp Control Circuit Short to Ground
DTC B2699 04
- Right Headlamp Control Circuit Open
Diagnostic Fault Information
Circuit/System Description
With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp and panel dimmer switch. The body control module (BCM) responds by applying a pulse width modulated (PWM) voltage to the left and right low beam headlamp control circuits illuminating the low beam headlamps.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Low beam headlamps ON.
Conditions for Setting the DTC
DTC B2575 01 and B2575 04
The BCM detects a short to voltage or an open/high resistance in the left low beam headlamp control circuit.
DTC B2575 02
The BCM detects a short to ground in the left low beam headlamp control circuit.
DTC B2699 01 and B2699 04
The BCM detects a short to voltage or an open/high resistance in the right low beam headlamp control circuit.
DTC B2699 02
The BCM detects a short to ground in the right low beam headlamp control circuit.
Actions Taken When the DTC Sets
* When DTC B2575 sets, the left low beam headlamp will be inoperative.
* When DTC B2699 sets, the right low beam headlamp will be 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 ignition cycles have occurred.
Reference Information
Schematic Reference
Headlights/Daytime Running Lights (DRL) Schematics Headlights/Daytime Running Lights (DRL) Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
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 B2575
1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the E13L headlamp - left.
2. Test for less than 5 ohms between the ground circuit terminal 2 and ground.
• 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 control circuit terminal 1 and ground, ignition ON.
4. Verify the test lamp turns ON and OFF when commanding the Left Low Beam Lamp 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 E13L headlamp bulb - left.
DTC B2699
1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the E13R headlamp - right.
2. Test for less than 5 ohms between the ground circuit terminal 2 and ground.
• 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 control circuit terminal 1 and ground, ignition ON.
4. Verify the test lamp turns ON and OFF when commanding the Right Low Beam Lamp 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 E13R headlamp bulb - right.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Headlamp Replacement Headlamp Replacement
* Headlamp Bulb Replacement (RS) Headlamp Bulb Replacement (RS)Headlamp Bulb Replacement (SS HID) Headlamp Bulb Replacement (SS HID)
* Control Module References Control Module References for BCM replacement, programming, and setup