Initial Inspection and Diagnostic Overview

General Troubleshooting Information

Resetting the Display Panel
The procedure should be done to reset the display panel control unit if the HDS is unable to clear DTCs.

1. Press and hold the tear window defogger button, the recirculation button, and passenger's temperature control up (hot) buttons.
2. Turn the ignition switch to the ACC (I) position while continuing to hold the buttons.
3. Hold the buttons for 6 seconds, then release.

NOTE:
- With navigation: If the radio is on, the audio-HVAC subdisplay unit will flash as the display panel is being reset. The clock will reset to 1:00.
- Without navigation: If the radio is on, the display panel control unit screen will flash as the display panel is being reset.

Self-diagnostic Function
The display panel control unit has a self-diagnostic function that covers the back light and LCD check, button light check and button operation check.

Entering the Self-diagnostic Function
1. Press and hold the driver's "AUTO" button and "DUAL" button.
2. Turn the ignition switch ACC (I), then release the buttons.

HVAC Button Check
Press any climate control button and the corresponding segment or LED will turn on to ensure LCD driver functionally and as button confirmation.

Back Light, LCD, Switch Light Check
Turn the combination light switch ON.
- Turn on the LCD back light.
- Turn on all LCD segments.
- Brings screen to full bright (with navigation).
- A beep sound is heard when pressing any climate control button (with navigation).

If the display panel control unit fails to complete any of the functions of the self-diagnostic function, go to the display panel control unit input test. Component Tests and General Diagnostics

Communication Circuit Test
1. Remove the upper panel.
2. Disconnect the display panel control unit connector B (6P) and connect the special tool (07AAZ-SEPA100) to display panel control unit.
3. Push and hold the driver's "AUTO" button for 5 seconds.




4. The driver's temperature and passenger's temperature indicators will display a code. Check the code in the list above. If the code is considered OK, then the center panel module's communication circuit is OK. If the code is considered a fault, replace the center panel module.

If the display module control unit fails to complete any of the functions of the self-diagnostic function, go to the display module control unit input test. Component Tests and General Diagnostics

Exiting the Self-diagnostic Function
- Press and hold the passenger's "AUTO" button for 3 seconds.
- Turn the ignition switch OFF.