Without Scan Tool

How to Use the Self-diagnostic Function without the HDS

The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following:

1. Turn the ignition switch OFF.
2. Press and hold the AUTO and RECIRCULATION buttons, turn the ignition switch ON (II), then release the AUTO and RECIRCULATION buttons.




3. ALL LCD segments come on for 2 seconds, then self-diagnostic function begins.

NOTE:
- The blower motor will run at various speeds regardless of what the panel is displaying.
- If there is any problem in the system, the system flashes "AUTO 88" or alternately flashes "AUTO 88" and one or more of the 14 segments (A through P). Refer to checking for DTCs.
- If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off.

Canceling the Self-diagnostic Function

4. Turn the ignition switch OFF to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other DTCs.