TELEMATICS SYSTEM, Diagnostic DTC:B1572

DTC Code DTC Name
B1572 Microphone Error

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area
B1572 Microphone Error Current at terminal MCVD exceeds the malfunction threshold for 20 seconds while the power switch is on (IG).

  • Telematics transceiver

  • Map light assembly (telephone microphone assembly)

  • Wire harness or connector

WIRING DIAGRAM

A0020R3E15
*a Map Light Assembly (Telephone Microphone Assembly)
*b Telematics Transceiver

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 Registration for Telematics System.

Click here

PROCEDURE


  1. CHECK DTC


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG) and wait for 20 seconds.

    4. Turn the GTS on.

    5. Check for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Telematics > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. INSPECT TELEMATICS TRANSCEIVER


    1. A0021CBC59
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      33 (MCVD) - Body ground Power switch on (ACC) 4 to 6 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the K158 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
      K158-33 (MCVD) - S4-4 (MACC) Always Below 1 Ω
      K158-34 (MCI+) - S4-3 (MCO+) Always Below 1 Ω
      K158-35 (MCI-) - S4-2 (MCO-) Always Below 1 Ω
      K158-33 (MCVD) or S4-4 (MACC) - Body ground Always 10 kΩ or higher
      K158-34 (MCI+) or S4-3 (MCO+) - Body ground Always 10 kΩ or higher
      K158-35 (MCI-) or S4-2 (MCO-) - Body ground Always 10 kΩ or higher
      K158-32 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Remove the map light assembly (telephone microphone assembly).

      Click here

    2. A0021HZC25
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (MACC) - 2 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

  5. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or known good one.

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > Telematics > Clear DTCs

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


      Body Electrical > Telematics > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

  6. REPLACE TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM REGISTRATION Click here