Horn: Testing and Inspection
HORN FUNCTION
Description
Perform answer-back for each operation with horn.
Component Function Check
1.CHECK FUNCTION
1. Select "HORN" in "ACTIVE TEST" mode with CONSULT-III.
2. Check the horn (high/low) operation.
Is the operation normal?
YES - Horn function is OK.
NO - SEE Diagnosis Procedure.
Diagnosis Procedure
1.CHECK HORN SWITCH
Check horn function with horn switch
Do the horns sound?
YES - GO TO 2.
NO - [1][2]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. Removal And Installation.
NO - Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
- INSPECTION END