Toyota RAV4 manuals

Toyota Sienna Service Manual: Steering Pad Switch Circuit

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

  1. 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

  1. 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

  1. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

REPLACE STEERING PAD SWITCH LH

Vehicle Speed Signal Circuit between Radio and Navigation Assembly and Combination Meter
DESCRIPTION The radio and navigation assembly receives a vehicle speed signal from the combination meter and information about the GPS antenna, and then adjusts vehicle position. HINT:   ...

Illumination Circuit
DESCRIPTION Power is supplied to the radio and navigation assembly and steering pad switch illumination when the light control switch is in the TAIL or HEAD position. WIRING DIAGRAM INSPECTI ...

Other materials:

No Signal from Transmitter ID1
DESCRIPTION The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the air pressure of the tires. The measured values are transmitted to the tire pressure warning antenna and receiver on the body as radio waves and then sent to the tir ...

DVD Player Mechanical Error/ DVD Insertion and Ejection Error/ DVD Reading Abnormal
DTC 44-10 DVD Player Mechanical Error DTC 44-11 DVD Insertion and Ejection Error DTC 44-12 DVD Reading Abnormal DESCRIPTION TC No. DTC Detection Condition Trouble Area 44-10 A mechanical error in the DVD player is detected while the DVD is not being insert ...

Inspection
1. INSPECT MASS AIR FLOW METER  Visually check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter. OK: There is no foreign matter. If the result is not as specified, replace the mass air flow meter. Measure the resistance according to the ...

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