Horn: Testing and Inspection

HORN FUNCTION

Description

Perform answer-back for each operation with horn.


Component Function Check


1. CHECK FUNCTION

1.Use CONSULT to perform Active Test "MULTIREMOTE ENT".
2.Touch "HORN" to check that it works normally.





Is the operation normal?
YES- Inspection End.
NO- .


Diagnosis Procedure

Regarding Wiring Diagram information, Remote Keyless Entry System King Cab

1. CHECK HORN FUNCTION

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 "HORN" in Active Test mode for "MULTIREMOTE ENT" with CONSULT.





3.Using an oscilloscope or analog voltmeter, check voltage between IPDM E/R connector E122 terminal 45 and ground.





Is the inspection result normal?
YES- Intermittent Incident.
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

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