Toyota Sienna Quiz
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Steering Pad Switch Circuit

In this manual: Navigation
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
10steps
~60min
3/5difficulty
Done 0 of 10

DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the radio receiver.

If there is an open in the circuit, the navigation system cannot be operated using the steering pad switch.

If there is a short in the circuit, the resulting condition is the same as if the switch were continuously depressed. Therefore, the radio and navigation assembly cannot be operated using the steering pad switch, and the radio and navigation assembly itself cannot function.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE: The vehicle is equipped with an SRS (Supplemental Restraint System) such as the airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (

1 INSPECT RADIO AND NAVIGATION ASSEMBLY

INSPECT RADIO AND NAVIGATION ASSEMBLY
  1. Disconnect the radio and navigation assembly connector R13.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2 INSPECT STEERING PAD SWITCH ASSEMBLY

  1. Disconnect the steering pad switch assembly connector A.
    INSPECT STEERING PAD SWITCH ASSEMBLY
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

3 INSPECT SPIRAL CABLE SUB-ASSEMBLY

INSPECT SPIRAL CABLE SUB-ASSEMBLY
  1. Disconnect the steering pad switch assembly and spiral cable sub-assembly connectors.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

NOTICE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the page shown in the brackets

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - RADIO AND NAVIGATION ASSEMBLY)

4 INSPECT STEERING PAD SWITCH CABLE

  1. Disconnect the steering pad switch LH and the steering pad switch RH.
    INSPECT STEERING PAD SWITCH CABLE
  2. Measure the resistance according to the value(s) in the table below

Standard resistance

Standard resistance

5 INSPECT STEERING PAD SWITCH RH

  1. Reconnect the steering pad switch RH.
    INSPECT STEERING PAD SWITCH RH
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

REPLACE STEERING PAD SWITCH LH

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