B3415

DTC B3415

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 Descriptor

DTC B3415 01

-
Automatic Headlamp Leveling Control Module Axle Sensor Supply Circuit Short to Battery

DTC B3415 02

-
Automatic Headlamp Leveling Control Module Axle Sensor Supply Circuit Short to Ground

Diagnostic Fault Information






Circuit/System Description

The front and rear suspension position sensors provide the headlamp control module with front and rear suspension position information. Each sensor receives a 5 V reference, signal, and low reference circuits from the headlamp control module. The sensors are connected to the control arms at the front and rear suspension. As the vehicle travels, the suspension compresses and rebounds moving the suspension position sensor arms. This causes the signal output of the sensors to change. The headlamp control module compares the information from the front and rear suspension position sensors and adjusts the headlamp leveling as needed.

Conditions for Running the DTC

* Battery voltage must be between 9-16 V.

* The ignition is in the ON or RUN position.

* The headlamps are ON.

Conditions for Setting the DTC

B3415 01

The DTC will set when the headlamp control module detects no signal and low voltage on the sensor signal line.

B3415 02

The DTC will set when the headlamp control module detects no signal and high voltage on the sensor signal line.

Action Taken When the DTC Sets

* The headlamp control module disables the headlamp leveling system.

* Headlamp leveling inoperative indication ON.

* Advanced front lighting system fault indication ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists.

Reference Information

Schematic Reference

Headlights/Daytime Running Lights (DRL) Schematics Headlights/Daytime Running Lights (DRL) Schematics

Connector End View Reference

Component Connector End Views Sunshade - Left (DH6)

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

1. Ignition OFF, disconnect the harness connector at the appropriate headlamp leveling sensor.

2. Disconnect the negative terminal of the C1 Battery.

3. Test for less than 5 ohms between the low reference circuit terminal 1 and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K26 Headlamp Control Module.

4. Reconnect the negative terminal to the C1 Battery.

5. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.

• If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K26 Headlamp Control Module.

• If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K26 Headlamp Control Module.

6. Verify the appropriate scan tool Leveling Position Sensor parameter is 0 mm.

• If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K26 Headlamp Control Module.

7. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5 V reference circuit terminal 3. Verify the appropriate scan tool Leveling Position Sensor parameter is greater than 0 mm.

• If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the K26 Headlamp Control Module.

8. If all circuits test normal, replace the appropriate headlamp leveling sensor.

Repair Instructions

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

* Headlamp Leveling Front Suspension Height Sensor Replacement Headlamp Leveling Front Suspension Height Sensor Replacement

* Headlamp Leveling Rear Suspension Height Sensor Replacement Headlamp Leveling Rear Suspension Height Sensor Replacement

* Control Module References Control Module References for headlamp control module replacement, programming and setup