DTC Indicator 7

DTC indicator 7: HVAC Control Unit Internal Error

NOTE: Check the battery condition and the charging system.

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

Is DTC 7 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 G503.