Climate Control-Audio Communication Line Circuit Troubleshooting
  1. Disconnect climate control unit connector A (28P) and the audio/navigation switch panel 24P connector (with navigation) or center display unit 12P connector (without navigation).
  1. Check for continuity between the following terminals of climate control unit connector A (28P) and the audio/navigation switch panel 24P connector or center display unit 12P connector.
    With navigation
    28P:
    24P:
    No. 19
    No. 7
    No. 20
    No. 19
    28P:
    12P:
    No. 19
    No. 7
    No. 20
    No. 8


Is there continuity?
YES -
Go to Step 3 .
NO -
Repair open in the wire between climate control unit connector A (28P) and the audio/navigation switch panel 24P connector or center display unit 12P connector.■