TELEMATICS SYSTEM(w/ Telematics Transceiver for G-BOOK), Diagnostic DTC:B15C4

DTC Code DTC Name
B15C4 Airbag Signal Malfunction/Not Input

DESCRIPTION

If the telematics transceiver detects an error in communication between the telematics transceiver and airbag sensor assembly as a result of the telematics transceiver self check, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B15C4 Airbag signal problem

  • Airbag system

  • Wire harness or connector

  • Airbag sensor assembly

  • Telematics transceiver

WIRING DIAGRAM

B001MY2E24
*1 Airbag Sensor Assembly
*2 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 Precaution for G-BOOK Click here.

PROCEDURE


  1. CHECK DTC OUTPUT (AIRBAG SYSTEM)


    1. Check for DTCs and check that no DTCs are output Click here.

      OK
      No DTCs are output.

    NG

    GO TO AIRBAG SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - AIRBAG SENSOR ASSEMBLY)


    1. Disconnect the H145 telematics transceiver connector.

    2. Disconnect the H84 airbag sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-24 (GSW) - H84-24 (GSW3) Always Below 1 Ω
      H145-24 (GSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT TELEMATICS TRANSCEIVER


    1. Disconnect the H145 telematics transceiver connector.

    2. B001L8EE07

      Check the input waveform.


      1. Check the signal waveform according to the condition(s) in the table below. (Check the waveform from the back of the wire harness connector of the telematics transceiver while the airbag sensor assembly connectors are connected.)

        Item Condition
        Tester Connection H145-24 (GSW) - Body ground
        Tool setting 5.0 V/DIV., 20 ms./DIV.
        Vehicle condition Power switch on (IG)
        OK
        The waveform is similar to the shown in the illustration.

    OK

    REPLACE TELEMATICS TRANSCEIVER Click here

    NG

  5. REPLACE AIRBAG SENSOR ASSEMBLY


    1. Replace the airbag sensor assembly with a new or known good one Click here.


    NEXT

  6. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    OK

    END (AIRBAG SENSOR ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here