Audio And Visual System Steering Pad Switch Circuit

Body Electrical. Camry. Acv40 Gsv40
Audio Visual. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT RADIO RECEIVER

INSPECT STEERING PAD SWITCH

INSPECT SPIRAL CABLE

AUDIO AND VISUAL SYSTEM - 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 audio system cannot be operated using the steering pad switch.
If there is a short in the circuit, the same condition as that when the switch is continuously depressed occurs.
Therefore, the radio receiver cannot be operated using the steering pad switch, and also the radio receiver itself cannot function.

WIRING DIAGRAM


Camry. Acv40 Gsv40.Audio Visual.Audio And Visual System.Audio And Visual System Steering Pad Switch Circuit


INSPECTION PROCEDURE

NOTICE:
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 Supplemental Restraint System (CAMRY_ACV40 RM000000KT107KX.html).
1.INSPECT RADIO RECEIVER


    Camry. Acv40 Gsv40.Audio Visual.Audio And Visual System.Audio And Visual System Steering Pad Switch Circuit

  1. Disconnect the radio receiver connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F8-7 (SW1) - F8-6 (SWG)
    		No switch is pushed
    		95 to 105 kΩ
    F8-7 (SW1) - F8-6 (SWG)
    		Seek+ switch: pushed
    		Below 2.5 Ω
    F8-7 (SW1) - F8-6 (SWG)
    		Seek- switch: pushed
    		313.5 to 346.5 Ω
    F8-7 (SW1) - F8-6 (SWG)
    		Volume+ switch: pushed
    		959.5 to 1060.5 Ω
    F8-7 (SW1) - F8-6 (SWG)
    		Volume- switch: pushed
    		3049.5 to 3370.5 Ω
    F8-8 (SW2) - F8-6 (SWG)
    		No switch is pushed
    		95 to 105 kΩ
    F8-8 (SW2) - F8-6 (SWG)
    		MODE switch: pushed
    		Below 2.5 Ω
    F8-8 (SW2) - F8-6 (SWG)*2
    		Voice switch: pushed
    		3049.5 to 3370.5 Ω
    F8-8 (SW2) - F8-6 (SWG)*2
    		On hook switch: pushed
    		313.5 to 346.5 Ω
    F8-8 (SW2) - F8-6 (SWG)*2
    		Off hook switch: pushed
    		959.5 to 1060.5 Ω
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Radio Receiver)
    1. *2: w/ Microphone


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (CAMRY_ACV40 RM0000012A803YX.html)

2.INSPECT STEERING PAD SWITCH

  1. Disconnect the steering pad switch assembly connector.



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


    Camry. Acv40 Gsv40.Audio Visual.Audio And Visual System.Audio And Visual System Steering Pad Switch Circuit


    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    a1-10 (AU1) - a1-8 (EAU)
    		No switch is pushed
    		95 to 105 kΩ
    a1-10 (AU1) - a1-8 (EAU)
    		Seek+ switch: pushed
    		Below 2.5 Ω
    a1-10 (AU1) - a1-8 (EAU)
    		Seek- switch: pushed
    		313.5 to 346.5 Ω
    a1-10 (AU1) - a1-8 (EAU)
    		Volume+ switch: pushed
    		959.5 to 1060.5 Ω
    a1-10 (AU1) - a1-8 (EAU)
    		Volume- switch: pushed
    		3049.5 to 3370.5 Ω
    a1-9 (AU2) - a1-8 (EAU)
    		No switch is pushed
    		95 to 105 kΩ
    a1-9 (AU2) - a1-8 (EAU)
    		MODE switch: pushed
    		Below 2.5 Ω
    a1-9 (AU2) - a1-8 (EAU)
    		Voice switch: pushed*10
    		3049.5 to 3370.5 Ω
    a1-9 (AU2) - a1-8 (EAU)
    		On hook switch: pushed*10
    		313.5 to 346.5 Ω
    a1-9 (AU2) - a1-8 (EAU)
    		Off hook switch: pushed*10
    		959.5 to 1060.5 Ω

    Text in Illustration
    *1
    		Component without harness connected
    (Steering Pad Switch Assembly)
    		*2
    		Volume-
    *3
    		Volume+
    		*4
    		Seek-
    *5
    		Seek+
    		*6
    		MODE
    *7
    		Off hook*10
    		*8
    		On hook*10
    *9
    		Voice*10
    		-
    		-
    1. *10: w/ Microphone


NG
REPLACE STEERING PAD SWITCH (CAMRY_ACV40 RM0000027YA00DX.html)
OK


3.INSPECT SPIRAL CABLE


    Camry. Acv40 Gsv40.Audio Visual.Audio And Visual System.Audio And Visual System Steering Pad Switch Circuit

  1. Disconnect the steering pad switch assembly and spiral cable connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    a1-8 (EAU) - E18-4 (EAU)
    		Center
    		Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right
    a1-10 (AU1) - E18-6 (AU1)
    		Center
    		Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right
    a1-9 (AU2) - E18-5 (AU2)
    		Center
    		Below 1 Ω
    2.5 rotations to the left
    2.5 rotations to the right
    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 pages shown in the brackets below.
    HINT:
    1. Removal (CAMRY_ACV40 RM000000UWD04BX.html)
    2. Installation (CAMRY_ACV40 RM000000UWA04BX.html)
    Text in Illustration
    *1
    		Component without harness connected
    (Spiral Cable)
    *2
    		Steering Pad Switch Side
    *3
    		Vehicle Side


NG
REPLACE SPIRAL CABLE (CAMRY_ACV40 RM000000UWD04BX.html)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)