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DTC B1579: Voice Recognition Microphone Disconnected [10/2015 - ]: Procedure

  1. INSPECT NAVIGATION ECU SUB-ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E20-19 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Navigation ECU Sub-assembly)
      GTY567785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result: 

    NG 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    OK 

    See step  2

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

      Result

      Model 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) - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) 
    1. Disconnect the E11 DCM (telematics transceiver) connector.
    2. Disconnect the N2*1 or N12*2 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E11-35 (MCI-) - N2-12 (MIC-)*1 Always Below 1 Ω
      E11-35 (MCI-) - N12-10 (MIC-)*2 Always Below 1 Ω
      E11-35 (MCI-) - Body ground Always 10 kΩ or higher
      • *1: w/o Toyota Safety Sense P
      • *2: w/ Toyota Safety Sense P

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the E20 navigation ECU sub-assembly connector.
    2. Disconnect the E11 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E20-19 (MIN-) - E11-19 (MCO-) Always Below 1 Ω
      E20-19 (MIN-) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) 
    1. Disconnect the E20 navigation ECU sub-assembly connector.
    2. Disconnect the N2*1 or N12*2 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E20-6 (SNS2) - N2-10 (SGND)*1 Always Below 1 Ω
      E20-6 (SNS2) - N12-8 (SGND)*2 Always Below 1 Ω
      E20-6 (SNS2) - Body ground Always 10 kΩ or higher
      • *1: w/o Toyota Safety Sense P
      • *2: w/ Toyota Safety Sense P

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E11-35 (MCI-) - Body ground Always Below 1 Ω
      GTY550629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Proceed to the next step based on the inspection result.

      Result

      Result Proceed to
      NG A
      OK B
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (DCM (Telematics Transceiver))

    Result: 

    A 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    B 

    See step  8

  7. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) 
    1. Disconnect the E20 navigation ECU sub-assembly connector.
    2. Disconnect the N2*1 or N12*2 inner rear view mirror assembly (amplifier microphone assembly connector).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E20-6 (SNS2) - N2-10 (SGND)*1 Always Below 1 Ω
      E20-6 (SNS2) - N12-8 (SGND)*2 Always Below 1 Ω
      E20-19 (MIN-) - N2-12 (MIC-)*1 Always Below 1 Ω
      E20-19 (MIN-) - N12-10 (MIC-)*2 Always Below 1 Ω
      E20-6 (SNS2) - Body ground Always 10 kΩ or higher
      E20-19 (MIN-) - Body ground Always 10 kΩ or higher
      • *1: w/o Toyota Safety Sense P
      • *2: w/ Toyota Safety Sense P

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Remove the inner rear view mirror assembly (amplifier microphone assembly) (Refer to REMOVAL [10/2015 - ] ).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      10 (SGND) - 12 (MIC-)*1 Always Below 1 Ω
      8 (SGND) - 10 (MIC-)*2 Always Below 1 Ω
      GTY555145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/o Toyota Safety Sense P
      *a Component without harness connected
      (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly)
      GTY551590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Toyota Safety Sense P
      *a Component without harness connected
      (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly)
      • *1: w/o Toyota Safety Sense P
      • *2: w/ Toyota Safety Sense P

    Result: 

    OK 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 

    (Refer to REMOVAL [10/2015 - ] )

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