Diagnosis Procedure

1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
   • 6CH CAN gateway
   • A/C auto amp.
   • Active noise control unit
4. Check the continuity between the A/C auto amp. harness connector and the active noise control unit harness connector.
   • With rear heated seats

     A/C auto amp. harness connector		Active noise control unit harness connector		Continuity
     Connector No.	Terminal No.	Connector No.	Terminal No.
     M54	1	M87	18	Existed
     	21		2	Existed

   • Without rear heated seats

     A/C auto amp. harness connector		Active noise control unit harness connector		Continuity
     Connector No.	Terminal No.	Connector No.	Terminal No.
     M65	1	M87	18	Existed
     	17		2	Existed

Is the inspection result normal?

>>

Check CAN system type decision again.

>>

Error was detected in the main line between the A/C auto amp. and the active noise control unit.

>>

Repair the main line between the A/C auto amp. and the active noise control unit.