Head Up Display (HUD) Inoperative

Head Up Display (HUD) Inoperative

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.



Circuit/System Description

The head-up display (HUD) is a secondary display system capable of reflecting important vehicle information onto the windshield. The vehicle information is displayed using virtual imaging and is reflected off the windshield in front of the driver. Battery positive voltage is the power source to the HUD system. The HUD system can only be enabled when the ignition is active and in RUN position. The HUD receives vehicle information to be displayed via class 2 serial data circuit. The HUD also interfaces with the HUD switch via discreet circuits and the HUD switch inputs to the HUD is low.


Reference Information
Schematic Reference

Head Up Display Schematics (Head Up Display Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Head Up Display (HUD) Description and Operation (Head Up Display (HUD) Description and Operation)
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

Control Module References (Programming and Relearning)for Scan Tool Information


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the head-up display (HUD).
2. Test for less than 1.0 ohm of resistance between the ground circuit terminal 4 and ground.

• If greater than the specified value, test the HUD ground circuit for an open/high resistance.

3. Verify a test lamp illuminates when connected between the battery positive voltage circuit terminal 6 and ground.

• If the test light does not illuminate, test the battery positive voltage circuit for an open/high resistance.

4. If all circuits test normal, test or replace the HUD.



Repair Instructions

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

* Head Up Display Switch Replacement (Head Up Display Switch Replacement)
* Control Module References (Programming and Relearning)for the HUD replacement, setup and programming