Vehicle Direction Alert Alarm Warning Malfunction
Vehicle Direction Alert Alarm Warning Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The vehicle alert alarm warning (VDAAW) system consists of a lane departure warning (LDW) module mounted on the windshield. The VDAAW is enabled and disabled through a toggle switch located in the headlamp switch assembly. When enabled, the VDAAW will illuminate the indicator located in the toggle 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 will illuminate 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.
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 (Rear Park Assist) (Object Detection Description and Operation (Rear Park Assist))Object Detection Description and Operation (VDAAW) (Object Detection Description and Operation (VDAAW))Object Detection Description and Operation (SOD) (Object Detection Description and Operation (SOD))
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Programming and Relearning (Programming and Relearning) for scan tool information
Circuit/System Verification
Command the VDAAW ON and OFF, using the scan tool parameter. VDAAW should become Active and Inactive when changing between commanded states.
Circuit/System Testing
Important: Before disconnecting the harness connector at the VDAAW module, ensure that the ignition has been OFF for at least 120 seconds. Failure to do so may result in component damage.
1. Ignition OFF for 120 seconds, disconnect the harness connector at the VDAAW module.
2. Ignition ON, verify that a test lamp illuminates between the B+ voltage circuit terminal 2 and ground.
• If the test lamp does not illuminate, test the B+ voltage circuit for an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the B+ voltage circuit for a short to ground.
3. Ignition OFF, check for less than 1.0 ohm between the ground circuit terminal 4 and ground.
• If greater than the specified range, test the ground circuit for a short to voltage or open/high resistance.
4. Ignition OFF for 120 seconds, connect the harness connector at the VDAAW module and disconnect the harness connector at the headlamp switch.
5. Ignition ON, verify the scan tool Mode Switch parameter is Inactive.
• If not the specified value, test the switch signal circuit for a short to voltage. If the circuit tests normal, replace the VDAAW module.
6. Install a 3-amp fused jumper wire between the switch signal circuit terminal 6 and the B+ voltage circuit. Verify the scan tool Mode Switch parameter is Active.
• If not the specified value, test the switch signal circuit for an open/high resistance. If the circuit tests normal, replace the VDAAW module.
7. Verify the scan tool Mode LED parameter is OFF.
• If not the specified value, test the indicator signal circuit for a short to voltage. If the circuit tests normal, replace the VDAAW module.
8. Install a 3-amp fused jumper wire between the indicator signal circuit terminal 5 and the B+ voltage circuit. Verify the scan tool Mode LED parameter is ON.
• If not the specified value, test the indicator signal circuit for an open/high resistance. If the circuit tests normal, replace the VDAAW module.
9. If all circuits test normal, test or replace the headlamp switch.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Headlamp Switch Replacement (Service and Repair)
* Programming and Relearning (Programming and Relearning) for VDAAW control module replacement, setup and programming