AIRBAG SYSTEM(w/ Curtain Shield Airbag) TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

The DTCs are displayed by blinking the SRS warning light.

Tech Tips


  • Make sure that DTCs which relate to the CAN communication system are not output. If any of these DTCs are output, check the CAN communication system.

    (w/ Toyota Safety Sense Click here)

    (w/o Toyota Safety Sense Click here)

  • When a warning light keeps blinking, a short to ground in the wiring of terminal TC of the DLC3 or an internal ground short in an ECU is suspected.

  • The DTC output mode signal is transmitted through the CAN to each ECU including the airbag sensor assembly. Thus if no systems enter DTC output mode, the ECM may have a malfunction.

WIRING DIAGRAM

B0046KVE05

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (DLC3 - ECM)


    1. Disconnect the A93*1, A58*2, A59*3 or A108*4 ECM connector.


      • *1: for 1KR-FE

      • *2: for 2NR-FKE

      • *3: for 1ND-TV without DPF

      • *4: for 1ND-TV with DPF

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

      Standard Resistance (for 1KR-FE)
      Tester Connection Condition Specified Condition
      F4-13 (TC) - A93-57 (TC) Always Below 1 Ω
      F4-13 (TC) or A93-57 (TC) - Body ground Always 10 kΩ or higher
      Standard Resistance (for 2NR-FKE)
      Tester Connection Condition Specified Condition
      F4-13 (TC) - A58-33 (TC) Always Below 1 Ω
      F4-13 (TC) or A58-33 (TC) - Body ground Always 10 kΩ or higher
      Standard Resistance (for 1ND-TV without DPF)
      Tester Connection Condition Specified Condition
      F4-13 (TC) - A59-24 (TC) Always Below 1 Ω
      F4-13 (TC) or A59-24 (TC) - Body ground Always 10 kΩ or higher
      Standard Resistance (for 1ND-TV with DPF)
      Tester Connection Condition Specified Condition
      F4-13 (TC) - A108-50 (TC) Always Below 1 Ω
      F4-13 (TC) or A108-50 (TC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (CG OF DLC3 - BODY GROUND)


    1. B0046DPE05
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      F4-4 (CG) -

      Body ground

      		 Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (TC OF ECM)


    1. Disconnect the A93*1, A58*2, A59*3 or A108*4 ECM connector.


      • *1: for 1KR-FE

      • *2: for 2NR-FKE

      • *3: for 1ND-TV without DPF

      • *4: for 1ND-TV with DPF

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

      Standard Resistance (for 1KR-FE)
      Tester Connection Condition Specified Condition
      F4-13 (TC) or A93-57 (TC) - Body ground Always 1 MΩ or higher
      Standard Resistance (for 2NR-FKE)
      Tester Connection Condition Specified Condition
      F4-13 (TC) or A58-33 (TC) - Body ground Always 1 MΩ or higher
      Standard Resistance (for 1ND-TV without DPF)
      Tester Connection Condition Specified Condition
      F4-13 (TC) or A59-24 (TC) - Body ground Always 1 MΩ or higher
      Standard Resistance (for 1ND-TV with DPF)
      Tester Connection Condition Specified Condition
      F4-13 (TC) or A108-50 (TC) - Body ground Always 1 MΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE ECM


    1. Replace the ECM.

    2. Check for DTCs of the ECM.


      Result
      Result Proceed to
      Normal code is output A
      DTC is output B
      DTC output mode is set (except airbag sensor assembly) C

    A

    END

    C

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    B

  5. RECONFIRM DTC


    1. Check for DTCs of the ECM.


      Result
      Result Proceed to
      DTC is output (1KR-FE) A
      DTC is output (2NR-FKE) B
      DTC is output (1ND-TV without DPF) C
      DTC is output (1ND-TV with DPF) D

    A

    GO TO GO TO INSPECTION PROCEDURE OF DTC OUTPUT Click here

    B

    GO TO GO TO INSPECTION PROCEDURE OF DTC OUTPUT Click here

    C

    GO TO GO TO INSPECTION PROCEDURE OF DTC OUTPUT Click here

    D

    GO TO GO TO INSPECTION PROCEDURE OF DTC OUTPUT Click here