CAN COMMUNICATION SYSTEM Center Airbag Sensor Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Center Airbag Sensor Communication Stop Mode

  • "SRS Airbag" not displayed on "Communication Bus Check" screen of intelligent tester

  • Applies to "Center Airbag Sensor Communication Stop Mode" in "DTC combination table"

  • Power source circuit of center airbag sensor assembly

  • Center airbag sensor assembly branch wire or connector

  • Center airbag sensor assembly

WIRING DIAGRAM

A01185SE01

INSPECTION PROCEDURE

Note


  • Inspect the fuses for circuit related to this system before performing the following inspection procedure.

  • Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.

  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

Tech Tips

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. CHECK FOR OPEN IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)


    1. A0119YOE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Turn the ignition switch off.

    2. Disconnect the D43 center airbag sensor assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      D43-13 (CANH) - D43-22 (CANL) Ignition switch off 54 to 69 Ω

    4. Reconnect the center airbag sensor assembly connector.


    NG

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)

    OK

  2. CHECK HARNESS AND CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY - BATTERY AND BODY GROUND)


    1. A0119YOE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Disconnect the D43 center airbag sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D43-25 (E1) - Body ground Always Below 1 Ω
      D43-26 (E2) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D43-21 (IG2) - Body ground Ignition switch ON 11 to 14 V

    4. Reconnect the center airbag sensor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here