SAFETY CONNECT SYSTEM, Diagnostic DTC:B15C4

DTC Code DTC Name
B15C4 Airbag Signal Malfunction/Not Input

DESCRIPTION

If the DCM (Telematics Transceiver) detects an error in communication between the DCM (Telematics Transceiver) and the airbag sensor assembly as a result of the DCM (Telematics Transceiver) self check, this DTC will be set.

DTC No. DTC Detection Condition Trouble Area
B15C4 DCM (Telematics Transceiver) detects an error in signals from airbag sensor assembly when power switch is on (IG).

  • Airbag system

  • Wire harness or connector

  • Airbag sensor assembly

  • DCM (Telematics Transceiver)

WIRING DIAGRAM

A011VJJE04

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK DTC (AIRBAG SYSTEM)

    1. Turn the power switch off.

    2. Connect the Techstream to the DLC3.

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

    4. Turn the Techstream on.

    5. Check the DTC of "Airbag System" Click here.

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

    GO TO AIRBAG SYSTEM Click here

    A

  2. INSPECT DCM (TELEMATICS TRANSCEIVER) (GSW SIGNAL)

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

      A011YVTE16

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I135-24 (GSW) - Body ground Power switch on (IG) 6.5 to 8.5 V
      Text in Illustration
      *a

      Component with harness connected

      (DCM (Telematics Transceiver))
      Reference Waveform
      Item Condition
      Tester connection I135-24 (GSW) - Body ground
      Tool setting 5.0 V/DIV., 20 ms/DIV.
      Vehicle condition Power switch on (IG)
      Result
      Result Proceed to
      8.5 V or higher A
      Below 6.5 V B
      6.5 to 8.5 V C
    B

    CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT) Click here

    C

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (FOR OPEN CIRCUIT)

    1. Remove the airbag sensor assembly but do not disconnect the connectors Click here.

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

      A011X73E06
      Standard Voltage
      Tester Connection Condition Specified Condition
      I47-24 (GSW3) - Body ground Power switch on (IG) 8.5 V or higher
      Text in Illustration
      *a

      Component with harness connected

      (Airbag Sensor Assembly)
      Reference Waveform
      Item Condition
      Tester connection I47-24 (GSW3) - Body ground
      Tool setting 5.0 V/DIV., 20 ms/DIV.
      Vehicle condition Power switch on (IG)
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT)

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I135-24 (GSW) - Body ground Always 10 kΩ or higher
    NG

    CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AIRBAG SENSOR ASSEMBLY) Click here

    OK

  5. REPLACE DCM (TELEMATICS TRANSCEIVER)

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

      Note

      • The power switch must be off.

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

    NEXT

    PERFORM DCM ACTIVATION Click here

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

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

    2. Disconnect the I47 airbag sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I135-24 (GSW) - I47-24 (GSW3) Always Below 1 Ω
      I135-24 (GSW) - Body ground Always 10 kΩ or higher
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here