Lexus NX: Horn System

Parts Location

PARTS LOCATION

ILLUSTRATION

*1

LOW PITCHED HORN ASSEMBLY

*2

HIGH PITCHED HORN ASSEMBLY

*3

HORN RELAY

*4

SPIRAL CABLE SUB-ASSEMBLY

*5

STEERING PAD SWITCH ASSEMBLY

*6

HORN BUTTON ASSEMBLY

*7

HORN FUSE

*8

NO. 2 ENGINE ROOM RELAY BLOCK

System Diagram

SYSTEM DIAGRAM

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Horn System

Symptom

Suspected Area

Link

Horn does not sound

HORN fuse

-

HORN relay

Low pitched horn assembly

High pitched horn assembly

Steering pad switch assembly

Spiral cable sub-assembly

Horn button assembly

Harness or connector

-

READ NEXT:

 Relay

On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT HORN RELAY ASSEMBLY (a) Remove the horn relay assembly. (b) Measure the resistance according to the value(s) in the tabl

 Lighting (ext)

 Afs (adaptive Front-lighting System)

SEE MORE:

 Control Module Communication Bus OFF (U0073,U0120,U0123,U0124,U0126,U0128,U0293)

DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) receives signals from the hybrid vehicle control ECU, steering sensor, parking brake ECU assembly, certification ECU (smart key ECU assembly) and yaw rate and acceleration sensor (airbag ECU assembly) via CAN communicatio

 Sensor of Rear Motor Inverter Temperature (P0AF3-676,P0AF6-675)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate the temperature sensor value for rear motor inverter is abnormal. The cause of this malfunction may be one of the following: Internal inverter malfunction Inverter with converter assembly internal circuit malfunction Hybrid cooling syste

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