SAFETY CONNECT SYSTEM, Diagnostic DTC:B1572

DTC Code DTC Name
B1572 Telephone Microphone Error

DESCRIPTION

This DTC is set when the DCM (Telematics Transceiver) detects a malfunction in the telephone microphone circuit.

DTC No. DTC Detection Condition Trouble Area
B1572 Current of MCVD reaches malfunction criteria for 10 seconds while engine switch is on (IG).

  • Wire harness or connector

  • Telephone microphone (Roof console box assembly)

  • DCM (Telematics Transceiver)

WIRING DIAGRAM

A01HOLBE04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC


    1. Turn the engine switch off.

    2. Connect the Techstream to the DLC3.

    3. Turn the engine switch on (IG) and wait for 10 seconds.

    4. Turn the Techstream on.

    5. Perform "Health Check" and check for current DTCs Click here.

      Result
      Result Proceed to
      DTC B1572 is output A
      DTC B1572 is not output B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE POWER SOURCE)


    1. A01HN4NE20
      Text in Illustration
      *a

      Component with harness connected

      (Roof Console Box Assembly)

      Remove the roof console box assembly but do not disconnect the connectors Click here.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S12-14 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      S12-12 (MCO-) - Body ground Always Below 1 Ω

    NG

    INSPECT DCM (TELEMATICS TRANSCEIVER) (TELEPHONE MICROPHONE POWER SOURCE) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - ROOF CONSOLE BOX ASSEMBLY)


    1. Disconnect the I135 DCM (Telematics Transceiver) connector.

    2. Disconnect the S12 roof console box assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I135-34 (MCI+) - S12-13 (MCO+) Always Below 1 Ω
      I135-35 (MCI-) - S12-12 (MCO-) Always Below 1 Ω
      I135-34 (MCI+) - Body ground Always 10 kΩ or higher
      I135-35 (MCI-) - Body ground Always 10 kΩ or higher
      I135-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TELEPHONE MICROPHONE (ROOF CONSOLE BOX ASSEMBLY) Click here

  4. INSPECT DCM (TELEMATICS TRANSCEIVER) (TELEPHONE MICROPHONE POWER SOURCE)


    1. A01HMGOE76
      Text in Illustration
      *a

      Component with harness connected

      (DCM (Telematics Transceiver))

      Remove the DCM (Telematics Transceiver) but do not disconnect the connectors Click here.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I135-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      I135-35 (MCI-) - Body ground Always Below 1 Ω

    NG

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. REPLACE DCM (TELEMATICS TRANSCEIVER)


    1. Replace the DCM (Telematics Transceiver) Click here.

      Note


      • The engine switch must be off.

      • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.


    NEXT

    PERFORM DCM ACTIVATION Click here