Diagnosis Procedure

1.CHECK DTC

With M.U.T.-III SE

Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
Select “Diagnostic Trouble Code” mode of “HVAC” using M.U.T.-III SE.
Check following DTC.
DTC Items
(M.U.T.-III SE screen terms)
Reference
B24B4-02 A/C CONTROL COMM DTC Description
U1CB1-02 A/C control 2 communication DTC Description

DTC	Items (M.U.T.-III SE screen terms)	Reference
B24B4-02	A/C CONTROL COMM	DTC Description
U1CB1-02	A/C control 2 communication	DTC Description

Is DTC detected?

Perform DTC diagnosis procedure that is detecting.

Replace A/C amp. Refer to Removal and Installation