Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000YZJQ
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: HORN: HORN SYSTEM: PROBLEM SYMPTOMS TABLE; 2017 - 2020 MY Sienna [08/2016 -        ]

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of the problem symptom. 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

See page

Horn does not sound.

Horn fuse

-

Horn relay

2017 - 2020 MY Sienna [08/2016 -        ]; HORN: RELAY: ON-VEHICLE INSPECTION

High pitched horn assembly

2016 - 2020 MY Sienna [12/2015 -        ]; HORN: HORN: INSPECTION

Low pitched horn assembly

2016 - 2020 MY Sienna [12/2015 -        ]; HORN: HORN: INSPECTION

Steering pad assembly (horn button switch)

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: STEERING PAD: ON-VEHICLE INSPECTION

Steering pad switch

2016 - 2017 MY Sienna [12/2015 - 11/2017]; AUDIO / VIDEO: STEERING PAD SWITCH: INSPECTION 2018 - 2020 MY Sienna [11/2017 -        ]; AUDIO / VIDEO: STEERING PAD SWITCH: INSPECTION

Spiral cable

2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: INSPECTION

Wire harness

-