Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B0988 4B: Vehicle Direction Alert Alarm Warning Camera Calibration Not LearnedCircuit/System Description
The lane departure warning (LDW) system consists of a vehicle direction alert alarm warning (VDAAW) module mounted on the windshield. The VDAAW is enabled and disabled through a switch located in the headlamp switch assembly. When enabled, the VDAAW will illuminate the indicator located in the switch. A camera located in the LDW module is used to locate lane markings in the road. When the system is working and can detect the lane markings, the VDAAW will illuminate the lane departure warning indicator in the instrument panel cluster (IPC). The IPC indicator will illuminate green when the system is operating properly and flash amber when the vehicle crosses a lane marking without the turn signal being used. An audible warning will also sound three times when the IPC indicator is flashing. The VDAAW system communicates with the IPC via serial data.
Conditions for Running the DTC
The system voltage is between 9-16 volts.
Conditions for Setting the DTC
The VDAAW module has not learned a calibration value.
Action Taken When the DTC Sets
| • | The VDAAW module disables the system. |
| • | The SERVICE LANE DEPARTURE SYSTEM message 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
Connector End View Reference
Description and Operation
Object Detection Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify DTC B0988 is not set.
| ⇒ | If the DTC is set, perform the Vehicle Direction Alert Alarm Warning Module Calibration procedure. If the DTC resets, replace the VDAAW module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for VDAAW module replacement, setup and programming
