B0987

DTC B0987

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 B0987 01
- Vehicle Direction Alert Alarm Warning Indicator Circuit Short to Battery

DTC B0987 04
- Vehicle Direction Alert Alarm Warning Indicator Circuit Open

Diagnostic Fault Information





Circuit/System Description

The lane departure warning system is controlled by the vehicle direction alert alarm warning (VDAAW) module mounted on the windshield. Lane departure warning is enabled and disabled through a switch located in the headlamp switch assembly. When enabled, the VDAAW module will illuminate the indicator located in the switch.

When the system is operating and can detect the lane markings, the VDAAW module will request via serial data communications that the instrument panel cluster (IPC) illuminate the green lane departure ready-to-assist indicator. If the VDAAW module detects that the vehicle has crosses a lane marking without the turn signal being used, the module will request that the IPC flash the yellow lane departure warning indicator. An audible warning will also sound three times when the yellow IPC indicator is flashing.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

The VDAAW module has detected an internal failure.

Action Taken When the DTC Sets

* Lane departure warning is disabled
* SERVICE LANE DEPARTURE SYSTEM is displayed on the DIC.

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

Object Detection Schematics ([1][2]Collision Avoidance and Parking Assist Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Object Detection Description and Operation (UFL) (Object Detection Description and Operation (UFL))Object Detection Description and Operation (UFR) (Object Detection Description and Operation (UFR))Object Detection Description and Operation (UFT) (Object Detection Description and Operation (UFT))
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 Verification

Verify DTC B0987 is not set.

Note: When programming the VDAAW, use a Tech 2 and CANDi module. Using the MDI to program the VDAAW will result in a failure to complete the programming operation.

If the DTC is set, perform the Vehicle Direction Alert Alarm Warning Module Programming and Setup (Vehicle Direction Alert Alarm Warning Module Programming and Setup) procedure. If the DTC resets, replace the vehicle direction alert alarm warning module.

Repair Instructions

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

* Headlamp Switch Replacement (Service and Repair)
* Control Module References (Programming and Relearning)for Vehicle Direction Alert Alarm Warning Module replacement, setup and programming.