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. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
|---|---|---|---|
HUD Image Down Switch Signal Circuit HUD Image Up Switch Signal Circuit | 1 | 1 | -- |
HUD Switch Low Reference Circuit | -- | 1 | -- |
1. Head Up Display Image Adjustment Inoperative | |||
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 image down or image up switch is depressed and the ignition is in the RUN position, the switch signal to the HUD is low.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Head Up Display (HUD) Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the head-up display (HUD)/Dimmer switch.
- Test for less than 1.0 ohm of resistance between the HUD switch ground circuit and ground.
- Install a 3A fused jumper wire between the image down switch signal circuit or the image up switch signal circuit and the low reference circuit. Verify the scan tool Adjust Display Down Switch or the Adjust Display Up Switch parameter is Active.
- If all circuits test normal, test or replace the HUD switch.
| ⇒ | If greater than 1.0 ohm, test the HUD switch ground circuit for an open/high resistance. |
| ⇒ | If not Active, test the image down switch signal circuit or the image up switch signal circuit and the switch low reference circuit for an open/high resistance. If the circuits test normal, replace the HUD. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for the HUD replacement, setup and programming |
