Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK HORN FUNCTION Check horn function with horn switch Do the horns sound?	GO TO 2	Refer to [HORN: WIRING DIAGRAM ]
2	CHECK HORN RELAY POWER SUPPLY Turn ignition switch ON. Perform "Active test", "HORN" with SDT. Using an oscilloscope or analog voltmeter, check voltage between IPDM E/R connector E122 terminal 45 and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Is the inspection result normal?	Repair or replace open harness between IPDM E/R and horn relay.	GO TO 3
3	CHECK HORN RELAY CIRCUIT Turn ignition switch OFF. Disconnect IPDM E/R and horn relay connector. Check continuity between IPDM E/R harness connector and horn relay harness connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 4. Check continuity between IPDM E/R harness connector and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Is the inspection result normal?	GO TO 4	Repair or replace harness.
4	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ] Is the inspection result normal?	Replace IPDM E/R. Refer to [IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM): REMOVAL AND INSTALLATION ]	Repair or replace the malfunctioning part.