Click here

CAN COMMUNICATION SYSTEM Center Airbag Sensor Communication Stop Mode

Click here
Click here
DTC Code DTC Name
  Center Airbag Sensor Communication Stop Mode
Click here

DESCRIPTION

Detection Item Symptom Trouble Area
Center Airbag Sensor Communication Stop Mode

Either condition is met:


  • Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the GTS.

    Click here

  • Communication system DTCs (DTCs that start with U) that correspond to "Center Airbag Sensor Communication Stop Mode" in "DTC Combination Table" are output

    Click here

  • Airbag ECU assembly branch line or connector

  • Power source circuit of airbag ECU assembly

  • Airbag ECU assembly ground circuit

  • Airbag ECU assembly
Figure 2. for RHD: B0065JXE22
Table 2.
*a No. 1 CAN Junction Connector
*b IG2 Relay
*c Airbag ECU Assembly
Figure 1. for LHD: Table 1. *a No. 2 CAN Junction Connector *b IG2 Relay *c Airbag ECU Assembly
Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Note:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.

    Click here

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

Tip:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.

  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

Click here

PROCEDURE


  1. Click here

    CHECK FOR OPEN IN CAN BUS LINES (AIRBAG ECU ASSEMBLY BRANCH LINE)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B0067Z3C99
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)

      Disconnect the O50 airbag ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O50-13 (CANH) - O50-22 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (AIRBAG ECU ASSEMBLY)

  2. Click here

    CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B0066VZC01
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O50-25 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
      O50-26 (E2) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

    2. Reconnect the cable to the negative (-) battery terminal.

    3. B0066VZC02
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O50-21 (IG2) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Result
      OK
      NG

    • OK

      REPLACE AIRBAG ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)