AUDIO AND VISUAL SYSTEM 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 a switch is continuously depressed occurs.

Therefore, the radio receiver assembly cannot be operated using the steering pad switch assembly, and also the radio receiver assembly itself cannot function.

WIRING DIAGRAM

A003RXJE07

INSPECTION PROCEDURE

Note

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 Supplemental Restraint System Click here.

PROCEDURE


  1. INSPECT RADIO RECEIVER ASSEMBLY


    1. A003RY6E31
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-7 (SW1) - E26-6 (SWG) No switch pushed 95 to 105 kΩ
      E26-7 (SW1) - E26-6 (SWG) Seek+ switch pushed Below 2.5 Ω
      E26-7 (SW1) - E26-6 (SWG) Seek- switch pushed 313 to 345 Ω
      E26-7 (SW1) - E26-6 (SWG) Volume+ switch pushed 950 to 1050 Ω
      E26-7 (SW1) - E26-6 (SWG) Volume- switch pushed 2955 to 3265 Ω
      E26-8 (SW2) - E26-6 (SWG) No switch pushed 95 to 105 kΩ
      E26-8 (SW2) - E26-6 (SWG) MODE switch pushed Below 2.5 Ω
      E26-8 (SW2) - E26-6 (SWG)*1 Voice switch pushed 2955 to 3265 Ω
      E26-8 (SW2) - E26-6 (SWG)*1 On hook switch pushed 313 to 345 Ω
      E26-8 (SW2) - E26-6 (SWG)*1 Off hook switch pushed 950 to 1050 Ω

      • *1: w/ Telephone Microphone Assembly


    NG

    INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


    1. A003UM9E34
      Text in Illustration
      *a

      Component without harness connected

      (Spiral with Sensor Cable Sub-Assembly)
      *b Steering Pad Switch Assembly Side
      *c Vehicle Side

      Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z2-8 (EAU) - E6-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z2-10 (AU1) - E6-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z2-9 (AU2) - E6-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

      The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Be sure to read the pages shown in the brackets.

      Tech Tips



    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the steering pad switch assembly connector.

      A003UENE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z2-10 (AU1) - z2-8 (EAU) No switch pushed 95 to 105 kΩ
      z2-10 (AU1) - z2-8 (EAU) Seek+ switch pushed Below 2.5 Ω
      z2-10 (AU1) - z2-8 (EAU) Seek- switch pushed 313 to 345 Ω
      z2-10 (AU1) - z2-8 (EAU) Volume+ switch pushed 950 to 1050 Ω
      z2-10 (AU1) - z2-8 (EAU) Volume- switch pushed 2955 to 3265 Ω
      z2-9 (AU2) - z2-8 (EAU) No switch pushed 95 to 105 kΩ
      z2-9 (AU2) - z2-8 (EAU) MODE switch pushed Below 2.5 Ω
      z2-9 (AU2) - z2-8 (EAU)*1 Voice switch pushed 2955 to 3265 Ω
      z2-9 (AU2) - z2-8 (EAU)*1 On hook switch pushed 313 to 345 Ω
      z2-9 (AU2) - z2-8 (EAU)*1 Off hook switch pushed 950 to 1050 Ω

      • *1: w/ Telephone Microphone Assembly

      Text in Illustration
      *A w/ Telephone microphone assembly - -
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 *b Seek+
      *c Volume+ *d Volume-
      *e MODE *f Seek-
      *g On hook *h Voice
      *i Off hook - -

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR