Coupe

HORN FUNCTION


Description

Perform answer-back for each operation with horn.





HORN FUNCTION


Diagnosis Procedure

Regarding Wiring Diagram information, refer to Coupe.
1.CHECK HORN FUNCTION
Check horn function with horn switch
Do the horns sound?
YES - GO TO 2
NO - Refer to Coupe.
2.CHECK HORN RELAY POWER SUPPLY
1. Turn ignition switch ON.
2. Perform "ACTIVE TEST" ("HORN") with CONSULT-Ill.





3. Using an oscilloscope or analog voltmeter, check voltage between IPDM E/R harness connector and ground.





Is the inspection result normal?
YES - Repair or replace open harness between IPDM E/R and horn relay.
NO - GO TO 3
3.CHECK HORN RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.





3. Check continuity between IPDM E/R harness connector and horn relay harness connector.





4. 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 Intermittent Incident.
Is the inspection result normal?
YES - Replace IPDM E/R.Refer to Service and Repair.
NO - Repair or replace the malfunctioning part.