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TROUBLE DIAGNOSIS ATC-111 C D E F G H I K L M A B ATC Multiplex Communication Circuit NJS0003U DIAGNOSIS PROCEDURE FOR MULTIPLEX COMMUNICATION SYMPTOM: A/C system cannot be controlled. 1. CHECK DISPLAY AND A/C AUTO AMP. OUTPUT SIGNAL 1. Turn ignition switch ON. 2. Check multiplex communication signal between display and A/C OK or NG OK >> GO TO 2. NG >> Replace display and A/C auto amp. RJIA3540E Terminals Voltage (+) ( − ) Display and A/C auto amp. connector Terminal No. M31 15 Ground M31 35 RJIA3541E RJIA0212E SJIA1479J |