Diagnosis Procedure

HORN FUNCTION


Description

Perform answer-back for each operation with horn.





HORN FUNCTION


Diagnosis Procedure

1. CHECK HORN FUNCTION
Check horn function with horn switch
Does the horn 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. Using an oscilloscope or analog voltmeter, check voltage between IPDM E/R 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 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 IPDM E/R (Intelligent Power Distribution Module Engine Room).
NO - Repair or replace the malfunctioning part.