RM38N0EC _59 Vehicle Exterior _111847 HORN _0499558 HORN SYSTEM T

HORN HORN SYSTEM PROBLEM SYMPTOMS TABLE

NOTICE:: Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

HINT:: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Horn System
Symptom	Suspected Area	Link
Horn does not sound	HORN fuse	-
	HORN relay	202111,999999,_59,_111847,_0499560,RM100000001YYG6,
	Horn button assembly	202111,202203,_58,_111838,_0502520,RM100000001ZADI,202203,202303,_58,_111838,_0502520,RM1000000022EG8,202303,202406,_58,_111838,_0502520,RM100000002AQNK,202406,999999,_58,_111838,_0502520,RM100000002MS7O,
	Spiral cable sub-assembly	202111,999999,_58,_111838,_0502521,RM100000001ZADK,
	Power distribution box assembly	202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,
	Harness or connector	-
Horn sounds all the time	HORN relay	202111,999999,_59,_111847,_0499560,RM100000001YYG6,
	Horn button assembly	202111,202203,_58,_111838,_0502520,RM100000001ZADI,202203,202303,_58,_111838,_0502520,RM1000000022EG8,202303,202406,_58,_111838,_0502520,RM100000002AQNK,202406,999999,_58,_111838,_0502520,RM100000002MS7O,
	Spiral cable sub-assembly	202111,999999,_58,_111838,_0502521,RM100000001ZADK,
	Power distribution box assembly	202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,
	Main body ECU (Multiplex network body ECU)	202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,
	Harness or connector	-
Low pitched horn operates but high pitched horn does not operate	High pitched horn assembly	202111,999999,_59,_111847,_0499559,RM100000001YYG4,
	Harness or connector	-
High pitched horn operates but low pitched horn does not operate	Low pitched horn assembly	202111,999999,_59,_111847,_0499559,RM100000001YYG4,
	Harness or connector	-