FixVault

DTC indicator A: Climate Control Unit Internal Error

NOTE: Check the 12 volt battery condition (see 12 VOLT BATTERY TEST ) and the charging system (see CHARGING SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING ).
  1. Turn the ignition switch to LOCK (0), and then to ON (II).
  2. Do the Self-Diagnostic Function with the climate control unit (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS  ).
  3. Check for DTCs.

    Is DTC A indicated? 

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

    NO  -Intermittent failure, the climate control unit is OK at this time.