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 image down or image up switch is depressed and the ignition is in the RUN position, the switch signal to the HUD is low.

Schematic Reference

Connector End View Reference

Description and Operation

Head Up Display (HUD) Description and Operation

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

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

⇒	If greater than 1 ohm, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Adjust Display Down Switch or the Adjust Display Up Switch parameter is Inactive.

⇒	If any is not Inactive, test the appropriate image switch signal circuit terminals 2 or 3 for a short to ground. If the circuit(s) tests normal, replace the HUD.

4. Install a 3A fused jumper wire between the image down switch signal circuit terminal 3 or the image up switch signal circuit terminal 2 and the ground circuit terminal 1. Verify the scan tool Adjust Display Down Switch or Adjust Display Up Switch parameter is Active.

⇒	If any is not Active, test the appropriate image switch signal circuit terminals 2 or 3 for a short to voltage or an open/high resistance. If the circuit(s) tests normal, replace the HUD.

5. If all circuits test normal, test or replace the dimmer/HUD switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.