Diagnosis Procedure

HORN FUNCTION


Description

Perform answer-back for each operation with horn.




HORN FUNCTION


Diagnosis Procedure

1.CHECK HORN SWITCH
Check horn function with horn switch
Do the horns sound?
YES - GO TO 2.
NO - Refer to Electrical Diagrams.
2.CHECK HORN RELAY POWER SUPPLY
1. Turn ignition switch ON.
2. Perform "ACTIVE TEST" ("HORN") with CONSULT-Ill.
3. Check voltage between malfunctioning horn relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 3.
3.CHECK HORN RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and horn relay connector.
3. Check continuity between IPDM E/R harness connector and malfunctioning horn relay harness connector.





4. Check continuity between driver seat control unit harness connector and ground.





Is the inspection result normal?
YES - Replace IPDM E/R. Refer to Removal and Installation.
NO - Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
Is the inspection result normal?
- INSPECTION END