Audio And Visual System (For Radio Receiver Type) Steering Pad Switch Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT STEERING PAD SWITCH ASSEMBLY

INSPECT SPIRAL CABLE SUB-ASSEMBLY

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)

AUDIO AND VISUAL SYSTEM (for Radio Receiver Type) - Steering Pad Switch Circuit


DESCRIPTION

This circuit sends an operation signal from the steering pad switch assembly to the radio receiver assembly.
If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly.
If there is a short in the circuit, the same condition as when the switch is continuously depressed occurs.
Therefore, the radio receiver assembly cannot be operated using the steering pad switch assembly, and the radio receiver assembly itself cannot function.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (For Radio Receiver Type) Steering Pad Switch Circuit


INSPECTION PROCEDURE

CAUTION:
The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the SRS (LandCruiser RM000000KT10NVX.html).
1.INSPECT STEERING PAD SWITCH ASSEMBLY

  1. Remove the steering pad switch assembly (LandCruiser RM0000039SA01YX.html).

  1. Inspect the steering pad switch assembly (LandCruiser RM000003C4V01IX.html).



NG
REPLACE STEERING PAD SWITCH ASSEMBLY (LandCruiser RM0000039SA01YX.html)
OK


2.INSPECT SPIRAL CABLE SUB-ASSEMBLY

  1. Remove the spiral cable sub-assembly (LandCruiser RM000002O8X02DX.html).

  1. Inspect the spiral cable sub-assembly (LandCruiser RM000002O8V03FX.html).



NG
REPLACE SPIRAL CABLE SUB-ASSEMBLY (LandCruiser RM000002O8X02DX.html)
OK


3.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)

  1. Disconnect the H47 radio receiver assembly connector.

  1. Disconnect the G40 spiral cable sub-assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H47-21 (SW1) - G40-6 (AU1)
    		Always
    		Below 1 Ω
    H47-22 (SW2) - G40-5 (AU2)
    		Always
    		Below 1 Ω
    H47-23 (SWG) - G40-4 (EAU)
    		Always
    		Below 1 Ω
    H47-21 (SW1) - Body ground
    		Always
    		10 kΩ or higher
    H47-22 (SW2) - Body ground
    		Always
    		10 kΩ or higher
    H47-23 (SWG) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000012A80HUX.html)