DTC B1202: HVAC Control Unit Internal Error

NOTE:

Check the battery condition (see BATTERY TEST ) and the charging system (see CHARGING SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING ).
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTC with the HDS.
Operate the heater-A/C control system in several modes.
Check for DTCs using the HDS.
Is DTC B1202 indicated?

YES -The HVAC control unit is faulty, replace the HVAC control unit (see HVAC CONTROL UNIT REMOVAL/INSTALLATION ). ■

NO -Intermittent failure, the HVAC control unit is OK at this time. Check for loose connection at the HVAC control unit 30P connector. ■