AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B1579

DTC Code DTC Name
B1579 Voice Recognition Microphone Disconnected

DESCRIPTION

The radio and display receiver assembly, roof console box sub-assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.

This DTC is stored when a microphone connection detection signal line is disconnected.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1579 Voice Recognition Microphone Disconnected Microphone signal is lost

  • Roof console box sub-assembly

  • Telephone microphone assembly

  • Radio and display receiver assembly

  • Telematics transceiver*

  • Harness or connector

WIRING DIAGRAM

Figure 1. w/ Sliding Roof

B0087QXE03
*a Telephone Microphone Assembly
*b Roof Console Box Sub-assembly
*c Radio and Display Receiver Assembly

Figure 2. w/o Sliding Roof

B0084FAE16

CAUTION / NOTICE / HINT

Note


  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

    Click here

  • When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:


    • A communication malfunction DTC may be stored.

    • The radio and display receiver assembly may not operate normally.

PROCEDURE


  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. B0088VKC04
      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K2-22 (MIN-) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (w/ Sliding Roof) A
      OK (w/o Sliding Roof and w/o Telematics Transceiver) B
      OK (w/o Sliding Roof and w/ Telematics Transceiver) C
      NG D

    B

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX SUB-ASSEMBLY) Click here

    C

    CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - ROOF CONSOLE BOX SUB-ASSEMBLY) Click here

    D

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX SUB-ASSEMBLY)


    1. Disconnect the K2 radio and display receiver assembly connector.

    2. Disconnect the V14 roof console box sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K2-25 (SNS2) - V14-6 (SNS2) Always Below 1 Ω
      K2-22 (MIN-) - V14-7 (MCO-) Always Below 1 Ω
      K2-25 (SNS2) or V14-6 (SNS2) - Body ground Always 10 kΩ or higher
      K2-22 (MIN-) or V14-7 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY


    1. Remove the roof console box sub-assembly.

      Click here

    2. B00870AC01
      *a

      Component without harness connected

      (Roof Console Box Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      6 (SNS2) - 7 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

  4. INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY


    1. Remove the roof console box sub-assembly.

      Click here

    2. Disconnect the B telephone microphone assembly connector.

    3. B0086GKC09
      *a

      Component without harness connected

      (Roof Console Box Sub-assembly (No. 1 Roof Wire Side))
      *b

      Component without harness connected

      (Roof Console Box Sub-assembly (Telephone Microphone Assembly Side))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-1 - V14-6 (SNS2) Always Below 1 Ω
      B-2 - V14-7 (MCO-) Always Below 1 Ω
      B-1 or V14-6 (SNS2) - V14-15 (GND) Always 10 kΩ or higher
      B-2 or V14-7 (MCO-) - V14-15 (GND) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    NG

    REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX SUB-ASSEMBLY)


    1. Disconnect the K2 radio and display receiver assembly connector.

    2. Disconnect the V13 roof console box sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K2-25 (SNS2) - V13-12 (SNS2) Always Below 1 Ω
      K2-22 (MIN-) - V13-11 (MCO-) Always Below 1 Ω
      K2-25 (SNS2) or V13-12 (SNS2) - Body ground Always 10 kΩ or higher
      K2-22 (MIN-) or V13-11 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY


    1. Remove the roof console box sub-assembly.

      Click here

    2. B0086JQC01
      *a

      Component without harness connected

      (Roof Console Box Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      12 (SNS2) - 11 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

  7. INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY


    1. Remove the roof console box sub-assembly.

      Click here

    2. Disconnect the B telephone microphone assembly connector.

    3. B0087H2C10
      *a

      Component without harness connected

      (Roof Console Box Sub-assembly (No. 1 Roof Wire Side))
      *b

      Component without harness connected

      (Roof Console Box Sub-assembly (Telephone Microphone Assembly Side))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-1 - V13-12 (SNS2) Always Below 1 Ω
      B-2 - V13-11 (MCO-) Always Below 1 Ω
      B-1 or V13-12 (SNS2) - V13-4 (GND) Always 10 kΩ or higher
      B-2 or V13-11 (MCO-) - V13-4 (GND) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    NG

    REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY Click here

  8. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - ROOF CONSOLE BOX SUB-ASSEMBLY)


    1. Disconnect the K145 telematics transceiver connector.

    2. Disconnect the V20 roof console box sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K145-35 (MCI-) - V20-4 (MCO-) Always Below 1 Ω
      K145-35 (MCI-) or V20-4 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Disconnect the K2 radio and display receiver assembly connector.

    2. Disconnect the K145 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K2-22 (MIN-) - K145-19 (MCO-) Always Below 1 Ω
      K2-22 (MIN-) or K145-19 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX SUB-ASSEMBLY)


    1. Disconnect the K2 radio and display receiver assembly connector.

    2. Disconnect the V20 roof console box sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K2-25 (SNS2) - V20-3 (SNS2) Always Below 1 Ω
      K2-25 (SNS2) or V20-3 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT TELEMATICS TRANSCEIVER


    1. Connect the K145 telematics transceiver connector.

    2. Connect the K2 radio and display receiver assembly connector.

    3. B0086U4C35
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K145-35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  12. INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY


    1. Remove the roof console box sub-assembly.

      Click here

    2. Connect the B telephone microphone assembly connector.

    3. B0084DRC02
      *a

      Component without harness connected

      (Roof Console Box Sub-assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (SNS2) - 4 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

  13. INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY


    1. Remove the roof console box sub-assembly.

      Click here

    2. Disconnect the B telephone microphone assembly connector.

    3. B0086U0C31
      *a

      Component without harness connected

      (Roof Console Box Sub-assembly (No. 1 Roof Wire Side))
      *b

      Component without harness connected

      (Roof Console Box Sub-assembly (Telephone Microphone Assembly Side))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-1 - V20-3 (SNS2) Always Below 1 Ω
      B-2 - V20-4 (MCO-) Always Below 1 Ω
      B-1 or V20-3 (SNS2) - V20-11 (GND) Always 10 kΩ or higher
      B-2 or V20-4 (MCO-) - V20-11 (GND) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    NG

    REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY Click here