Pinpoint Test G: The Head Up Display (HUD) Module Is Inoperative

Forward Collision Warning

Pinpoint Tests

Pinpoint Test G: The Head Up Display (HUD) Module Is Inoperative

Normal Operation

The Head Up Display (HUD) module is designed with a temperature sensor internal to the module. Due to extremely hot weather conditions, the temperature sensor circuit is designed to allow the HUD module to become disabled under high temperature conditions which could damage the HUD module LEDs. The LEDs remain off until the internal temperature is cool enough to operate and not damage the LEDs. The forward collision avoidance system still operates, but only emits a chime from the Instrument Panel Cluster (IPC) and mutes the audio system.

The HUD module is designed with a LED prove-out test. Upon each ignition cycle when the ignition switch is in RUN, the LEDs illuminate for a period of time indicating the HUD module is functional.

This pinpoint test is intended to diagnose the following:

- HUD module
- Cruise-Control Module (C-CM)



PINPOINT TEST G: THE HUD MODULE IS INOPERATIVE

G1 CHECK FOR HUD MODULE LED PROVE OUT TEST


NOTE: Make sure to remove the vehicle from the extreme heat source or sunload condition prior to testing the vehicle.

- Ignition ON.
- While placing the ignition switch in RUN, observe the HUD module LEDs.
- Do the HUD module LEDs illuminate?

Yes
The HUD module LEDs are operating correctly at this time. The concern may have been caused by extreme temperatures. TEST the system for normal operation.

No
GO to G2.

-------------------------------------------------
G2 CHECK THE DTCs FROM THE CONTINUOUS AND ON-DEMAND HUD MODULE AND C-CM SELF-TESTS


- Check the HUD module and C-CM DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?

Yes
For HUD module DTCs, REFER to DTC Charts. Forward Collision Warning

For C-CM DTCs, REFER to Fire Suppression System.

No
INSTALL a new HUD module. REFER to Head Up Display (HUD) Module Service and Repair. CLEAR the DTCs. TEST the system for normal operation.

-------------------------------------------------