HVAC DTC Troubleshooting: 11
DTC indicator 11: HVAC Control Unit Internal Error
1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to LOCK (0) and then back to ON (II).

?2.
Do the Self-Diagnostic Function with the HVAC control unit.

?3.
Check for DTCs.

Is DTC 11 indicated?

     
YES
     
     
     
     
NO
     
     
     
Intermittent failure, the HVAC control unit is OK at this time.?