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 | Signal Performance |
|---|---|---|---|---|
HUD Image Down Switch Signal Circuit HUD Image Up Switch Signal Circuit | 3620 | 1 | -- | -- |
HUD Switch Ground 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 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
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) switch.
- Test for less than 1.0 ohm of resistance between the low reference circuit terminal 3 and ground.
- 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 all circuits test normal, test or replace the HUD switch.
| ⇒ | If greater than the specified value, test the low reference circuit for an open/high resistance. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for the HUD replacement, setup and programming |
