STEP 1. Resistance measurement at HUD connector (AN+, AN-, SW- terminal).
(1) Disconnect the HUD and HUD switch connector, and measure at the wiring harness side.
(2) Measure the resistance between the HUD connector (AN+) and HUD switch connector terminal No. 2OK: The resistance should be 2 ohms or less
(3) Measure the resistance between the HUD connector (AN-) and HUD switch connector terminal No. 7OK: The resistance should be 2 ohms or less
(4) Measure the resistance between the HUD connector (SW-) and HUD switch connector terminal No. 11OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 2. Correct the circuit between the HUD connector and HUD switch connector (AN+, AN- or SW- terminal).