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Audio System: Inspection

  1. INSPECT POWER AMPLIFIER CIRCUIT 

    Disconnect the connector from power amplifier and inspect the connector on the wire harness side.

    Fig 1: Identifying Power Amplifier Circuit Connector On Wire Harness Side
    G02904580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    POWER AMPLIFIER CIRCUIT SPECIFIED CONDITION

    Tester connection Condition Specified condition
    12 - Ground Constant Continuity
    13 - Ground Constant Continuity
    7 - Ground Constant Battery voltage
    16 - Ground Constant Battery voltage

    If the circuit is not as specified, inspect the circuits connected to other parts.

  2. INSPECT REAR SEAT AUDIO CIRCUIT 

    Disconnect the connector from RSA controller and inspect the connector on the wire harness side.

    Fig 2: Identifying Rear Seat Audio Circuit Connector On Wire Harness Side
    G02904581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    REAR SEAT AUDIO CIRCUIT SPECIFIED CONDITION

    Tester connection Condition Specified condition
    17 - Ground Constant Continuity
    24 - Ground Ignition switch LOCK and radio switch ON No voltage
    24 - Ground Ignition switch ACC or ON and radio switch ON Battery voltage
    12 - Ground Constant Battery voltage

    If the circuit is not as specified, inspect the circuits connected to other parts.

  3. INSPECT DVD CHANGER CIRCUIT 

    Disconnect the connector from DVD changer and inspect the connector on the wire harness side.

    Fig 3: Identifying DVD Changer Circuit Connector On Wire Harness Side
    G02904582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DVD CHANGER CIRCUIT SPECIFIED CONDITION

    Tester connection Condition Specified condition
    20 - Ground Constant Continuity
    1 - Ground Ignition switch LOCK No voltage
    1 - Ground Ignition switch ACC or ON Battery voltage
    10 - Ground Constant Battery voltage

    If the circuit is not as specified, inspect the circuits connected to other parts.

  4. INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT 

    Disconnect the connectors from the radio receiver assembly, and inspect the connector on the wire harness side.

    Fig 4: Identifying Radio Receiver Assembly Circuit Connector A, B & C On Wire Harness Side
    G02904583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    RADIO RECEIVER ASSEMBLY CIRCUIT SPECIFIED CONDITION

    Tester connection Condition Specified condition
    A20 - Ground Constant Continuity
    A1 - Ground Constant Battery voltage
    A11 - Ground Ignition switch LOCK No voltage
    A11 - Ground Ignition switch ACC or ON Battery voltage

    If the circuit is not as specified, inspect the circuits connected to other parts.

    HINT:

    Check the wire harness between radio receiver assembly and the CD auto changer, between radio receiver assembly and power amplifier.

  5. INSPECT STEERING PAD SWITCH CIRCUIT 

    Disconnect the connectors from the steering pad switch, and inspect the connector on the wire harness side.

    Fig 5: Identifying Steering Pad Switch Circuit Connector On Wire Harness Side
    G02904584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    STEERING PAD SWITCH CIRCUIT SPECIFIED CONDITION

    Tester connection Condition Specified condition
    AU1 - EAU Do not switch position Approx. 100 kΩ
    AU1 - EAU SEEK+ switch: push 0 Ω
    AU1 - EAU SEEK- switch: push Approx. 0.3 Ω
    AU1 - EAU VOL+ switch: push Approx. 1 kΩ
    AU1 - EAU VOL- switch: push Approx. 3.2 kΩ
    AU2 - EAU Do not switch position Approx. 100 kΩ
    AU2 - EAU MODE switch: push 0 Ω

    If the circuit is not as specified, inspect the circuits connected to other parts.

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