( TL19E00G10500016661FAAT00 )

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.■

1. Check for continuity between body ground and climate control unit connector A (28P) No. 19 and No. 20 terminals individually.

Is there continuity?

YES | - | Repair short to body ground in the wire between climate control unit connector A (28P) and the audio/navigation switch panel 24P connector or center display unit 12P connector.■
NO | - | Go to Step 4 .

1. Reconnect climate control unit connector A (28P).

1. With navigation: Connect the audio/navigation switch panel 24P connector No. 7 and No. 19 terminals with a jumper wire. Without navigation: Connect the center display unit 12P connector No. 7 and No. 8 terminals with a jumper wire.

1. Turn the ignition switch to ON (II).

1. Press and hold the DEF button and OFF button.

Is the DEF button LED blinking?

YES | - | Audio/navigation switch panel or center display unit is faulty, replace the audio/navigation switch panel or center display unit. ■
NO | - | Climate control unit is faulty, replace the climate control unit. ■