TELEMATICS SYSTEM(w/ Telematics Transceiver except G-BOOK), 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 engine switch is on (IG).

  • Telematics transceiver

  • Map light assembly (telephone microphone assembly)

  • Harness or connector

WIRING DIAGRAM

B005774E01

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 FOR DTC


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

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


    1. Disconnect the I40 telematics transceiver connector.

    2. Disconnect the T7 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
      I40-33 (MCVD) - T7-4 (MACC) Always Below 1 Ω
      I40-33 (MCVD) or T7-4 (MACC) - Body ground Always 10 kΩ or higher
      I40-34 (MCI+) - T7-3 (MCO+) Always Below 1 Ω
      I40-34 (MCI+) or T7-3 (MCO+) - Body ground Always 10 kΩ or higher
      I40-35 (MCI-) - T7-2 (MCO-) Always Below 1 Ω
      I40-35 (MCI-) or T7-2 (MCO-) - Body ground Always 10 kΩ or higher
      I40-32 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAP LIGHT ASSEMBLY


    1. B0058MVC01
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly)

      Remove the map light assembly.

      Click here

    2. Remove the telephone microphone assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-4 (MACC) - B-6 (MACC) Always Below 1 Ω
      A-3 (MCO+) - B-5 (MIC+) Always Below 1 Ω
      A-2 (MCO-) - B-4 (MIC-) Always Below 1 Ω
      A-4 (MACC) - A-3 (MCO+) Always 10 kΩ or higher
      A-4 (MACC) - A-2 (MCO-) Always 10 kΩ or higher
      A-3 (MCO+) - A-2 (MCO-) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  4. CHECK 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. Check 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 (TELEPHONE MICROPHONE ASSEMBLY IS DEFEICTIVE)

    NG

  5. REPLACE TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM REGISTRATION Click here