Head Up Display (HUD) Image Adjustment Inoperative

Head Up Display (HUD) Image Adjustment 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.



Diagnostic Fault Information






Circuit/System Description

The head-up display (HUD) image down or image up switch is used to vertically adjust the HUD image on the windshield to accommodate various vehicle operator heights. The HUD monitors the image down or image up switch signal circuit in order to adjust image positions. When the HUD information down or information up switch is depressed and the ignition is in the RUN position, the switch signal 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) switch.
2. Test for less than 1.0 ohm of resistance between the low reference circuit terminal 3 and ground.

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

3. Ignition ON, test for 4.8-5.2 volts between the HUD image up control circuit terminal 7 or the HUD image down control circuit terminal 4 and the low reference circuit terminal 3.

• If greater than the specified range, test the control circuit for a short to voltage resistance. If the circuit(s) tests normal, replace the HUD.

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



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