AUDIO AND VISUAL SYSTEM Steering Pad Switch Circuit

DESCRIPTION

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

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

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 LH, and also the radio receiver assembly itself cannot function.

WIRING DIAGRAM

A01CDW7E03

INSPECTION PROCEDURE

Note

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System Click here.

PROCEDURE


  1. INSPECT RADIO RECEIVER ASSEMBLY


    1. A01CDA9E28
      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
      F6-7 (SW1) - F6-6 (SWG) No switch is pushed 95 to 105 kΩ
      F6-7 (SW1) - F6-6 (SWG) Seek+ switch: pushed Below 2.5 Ω
      F6-7 (SW1) - F6-6 (SWG) Seek- switch: pushed 312 to 345 Ω
      F6-7 (SW1) - F6-6 (SWG) Volume+ switch: pushed 950 to 1050 Ω
      F6-7 (SW1) - F6-6 (SWG) Volume- switch: pushed 2954 to 3265 Ω
      F6-8 (SW2) - F6-6 (SWG) No switch is pushed 95 to 105 kΩ
      F6-8 (SW2) - F6-6 (SWG) MODE switch: pushed Below 2.5 Ω

    NG

    INSPECT STEERING PAD SWITCH LH Click here

    OK

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

  2. INSPECT STEERING PAD SWITCH LH


    1. Disconnect the steering pad switch LH connector.

    2. Measure the resistance according to the values in the table below.

      A01CGA5E01
      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-10 (AU1) - z7-8 (EAU) No switch is pushed 95 to 105 kΩ
      z7-10 (AU1) - z7-8 (EAU) Seek+ switch: pushed Below 2.5 Ω
      z7-10 (AU1) - z7-8 (EAU) Seek- switch: pushed 312 to 345 Ω
      z7-10 (AU1) - z7-8 (EAU) Volume+ switch: pushed 950 to 1050 Ω
      z7-10 (AU1) - z7-8 (EAU) Volume- switch: pushed 2954 to 3265 Ω
      z7-9 (AU2) - z7-8 (EAU) No switch is pushed 95 to 105 kΩ
      z7-9 (AU2) - z7-8 (EAU) MODE switch: pushed Below 2.5 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch LH)

      		 *b Volume-
      *c Volume+ *d Seek-
      *e Seek+ *f MODE

    NG

    REPLACE STEERING PAD SWITCH LH Click here

    OK

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A01CFATE28
      Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable Sub-assembly)
      *b Steering Pad Switch LH Side
      *c Vehicle Side

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-8 (EAU) - G3-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z7-10 (AU1) - G3-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z7-9 (AU2) - G3-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

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


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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