HORN
Diagnosis Procedure
1.CHECK HORN FUNCTION
Check horn function with horn switch
Do the horns sound?
YES >> GO TO 2
NO >> Refer to See: Diagrams\Electrical\Lighting and Horns\Horn\Coupe.
2.CHECK HORN RELAY POWER SUPPLY
- Turn ignition switch ON.
- Perform "ACTIVE TEST" ("HORN") with CONSULT-Ill.
- Using an analog voltmeter or an oscilloscope, check voltage between IPDM E/R connector E17 terminal 44 and ground.
Is the Inspection result normal?
YES >> Repair or replace harness between IPDM E/R and horn relay.
NO >> 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.
- Check continuity between IPDM E/R harness connector and ground.
Is the Inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
Is the Inspection result normal?
YES >> Replace IPDM E/R.Refer to See: Power and Ground Distribution\Power Distribution Module\Service and Repair.
NO >> Repair or replace the malfunctioning part.
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