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DTC B1579: Voice Recognition Microphone Disconnected [04/2013 - 09/2018]: Procedure

  1. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY456158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Radio Receiver Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      K58-48 (MIN-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2013 - 09/2020] 

    Result: 

    OK 

    See step  2

  2. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the K66 DCM (telematics transceiver) connector.
    2. Disconnect the S4 map light assembly (telephone microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K66-35 (MCI-) - S4-2 (MCO-) Always Below 1 Ω
      K66-35 (MCI-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the K58 radio receiver assembly connector.
    2. Disconnect the K66 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K58-48 (MIN-) - K66-19 (MCO-) Always Below 1 Ω
      K58-48 (MIN-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the K58 radio receiver assembly connector.
    2. Disconnect the S4 map light assembly (telephone microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K58-49 (SNS2) - S4-1 (SNS2) Always Below 1 Ω
      K58-49 (SNS2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Reconnect the K66 DCM (telematics transceiver) connector.
    2. Reconnect the K58 radio receiver assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY471044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM (Telematics Transceiver))

      Standard Resistance

      Tester Connection Condition Specified Condition
      K66-35 (MCI-) - Body ground Always Below 1 Ω
    4. Proceed to the next step based on the inspection result.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  8

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [04/2013 - 10/2017]  , or refer to  REMOVAL [10/2017 - 09/2020] 

  7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the K58 radio receiver assembly connector.
    2. Disconnect the S4 map light assembly (telephone microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K58-49 (SNS2) - S4-1 (SNS2) Always Below 1 Ω
      K58-48 (MIN-) - S4-2 (MCO-) Always Below 1 Ω
      K58-49 (SNS2) - Body ground Always 10 kΩ or higher
      K58-48 (MIN-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT MAP LIGHT ASSEMBLY 
    1. Remove the map light assembly (telephone microphone assembly).

      Refer to REMOVAL [04/2013 - 09/2018]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (SNS2) - 2 (MCO-) Always Below 1 Ω
      GTY471071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Map Light Assembly (Telephone Microphone Assembly))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2013 - 09/2020] 

    Result: 

    NG 

    See step  9

  9. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly.

      Refer to REMOVAL [04/2013 - 09/2018]

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [04/2013 - 06/2014] , or refer to DTC CHECK / CLEAR [06/2014 - 09/2018]

      Body Electrical > Navigation System > Clear DTCs 

    3. Recheck for DTCs and check that no DTCs are output.

      Body Electrical > Navigation System > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL [04/2013 - 09/2018] 

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