CAN COMMUNICATION SYSTEM Center Airbag Sensor Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Center Airbag Sensor Communication Stop Mode

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

  • Applies to "Center Airbag Sensor Communication Stop Mode" in the "DTC COMBINATION TABLE"

  • Power source circuit of the center airbag sensor

  • Center airbag sensor branch wire or connector

  • Center airbag sensor assembly

WIRING DIAGRAM

A017CLFE05

INSPECTION PROCEDURE

Note


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

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

  • 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 any doors need to be opened in order to check the connectors, open the doors and leave them open.

Tech Tips


  • Operating the ignition switch, any other switches, or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below will help determine the cause of the malfunction.

PROCEDURE


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


    1. Turn the ignition switch off.

    2. Disconnect the center airbag sensor assembly connector.

    3. A017G3IE07

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D27-13 (CANH) - D27-22 (CANL) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)

    OK

  2. CHECK HARNESS AND CONNECTOR (IG2, E1, E2)


    1. Disconnect the center airbag sensor assembly connector.

    2. A017G3IE08

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D27-25 (E1) - Body ground Always Below 1 Ω
      D27-26 (E2) - Body ground Always Below 1 Ω

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

      Standard voltage
      Tester Connection Condition Specified Condition
      D27-21 (IG2) - Body ground Ignition switch on (IG) 10 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here