Reading and Clearing Diagnostic Trouble Codes

General Troubleshooting Information

How to Check for DTCs with the HDS

1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.






3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the display panel control unit. If it doesn't, troubleshoot the DLC circuit.
5. Select Front Panel in the BODY ELECTRICAL menu.
6. Select DTCs in the Front panel menu.
7. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the indicated DTC troubleshooting. If no DTCs are indicated, refer to symptom troubleshooting. Symptom Related Diagnostic Procedures

NOTE:
- After troubleshooting, clear the DTCs with the HDS.
- For specific operations, refer to the user's manual that came with the HDS.

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 rear window defogger button, the recirculation button, and passenger's temperature control up (hot) buttons.
2. Turn the ignition switch to ON (II) 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 to ON (II), then release the buttons.

HVAC Button Check

Press any climate control button and the corresponding segment or LED will turn on to confirm the LCD function and button function.

Back Light, LCD, Switch Light Check

Turn the combination light switch ON.

- Turn on the LCD back light.
- Turn on ail LCD segments.
- Brings screen to full bright (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 dashboard center vent.
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 below. 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 panel 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 to LOCK (0).