Heating/Air Conditioning

DTC indicator 13: HVAC Control Unit Internal Error

NOTE: Check the battery condition and the charging system.

1. Turn the ignition switch to LOCK (0) and then to ON (II).
2. Do the self-diagnostic function with the HVAC control unit.
3. Check for DTCs.

Is DTC 13 indicated?

YES - The HVAC control unit is faulty, replace the HVAC control unit.

NO - Intermittent failure; the HVAC control unit is OK at this time. Check for poor connections at the HVAC control unit and at G401.