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AIRBAG SYSTEM(for Type A) Diagnosis Circuit

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DTC Code DTC Name
  Diagnosis Circuit
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DESCRIPTION

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

DTCs are output by the blinking of the SRS warning light.

Tip:

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

  • A DTC output mode signal is transmitted through the CAN communication system to each ECU, including the airbag sensor assembly. Thus, when all systems do not enter DTC output mode, there may be an ECM malfunction.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • After turning the ignition 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.

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  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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PROCEDURE


  1. Click here

    CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication DTC is output.

      for LHD:Click here

      for RHD:Click here

      Result
      Proceed to
      DTCs are output (for LHD)
      DTCs are output (for RHD)
      DTC is not output

    • DTCs are output (for LHD)

      GO TO CAN COMMUNICATION SYSTEMClick here

    • DTCs are output (for RHD)

      GO TO CAN COMMUNICATION SYSTEMClick here

    • DTC is not outputClick here
  2. Click here

    CHECK HARNESS AND CONNECTOR (DLC3 - ECM)


    1. B0027N9C01
      *A for 1TR-FE, 2TR-FE *B for 1KD-FTV, 2KD-FTV
      *C for 1GD-FTV, 2GD-FTV *D for 1GR-FE
      *a

      Front view of wire harness connector

      (to ECM)

      		 *b Front view of DLC3

      Turn the ignition switch off.

    2. Disconnect the connector from the ECM.

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

      Standard Resistance
      Table 1. for 1TR-FE, 2TR-FE
      Tester Connection Condition Specified Condition
      G46-19 (TC) - G8-13 (TC) Always Below 1 Ω
      Table 2. for 1KD-FTV, 2KD-FTV
      Tester Connection Condition Condition
      G84-11 (TC) - G8-13 (TC) Always Below 1 Ω
      Table 3. for 1GD-FTV, 2GD-FTV
      Tester Connection Condition Condition
      G85-25 (TC) - G8-13 (TC) Always Below 1 Ω
      Table 4. for 1GR-FE
      Tester Connection Condition Condition
      G87-6 (TC) - G8-13 (TC) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)


    1. B0026D8C26
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-4 (CG) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    1. B0027LKC01
      *A for 1TR-FE, 2TR-FE *B for 1KD-FTV, 2KD-FTV
      *C for 1GD-FTV, 2GD-FTV *D for 1GR-FE
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -

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

      Standard Resistance
      Table 5. for 1TR-FE, 2TR-FE
      Tester Connection Condition Specified Condition
      G46-19 (TC) - Body ground Always 1 MΩ or higher
      Table 6. for 1KD-FTV, 2KD-FTV
      Tester Connection Condition Specified Condition
      G84-11 (TC) - Body ground Always 1 MΩ or higher
      Table 7. for 1GD-FTV, 2GD-FTV
      Tester Connection Condition Specified Condition
      G85-25 (TC) - Body ground Always 1 MΩ or higher
      Table 8. for 1GR-FE
      Tester Connection Condition Specified Condition
      G87-6 (TC) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE AIRBAG SENSOR ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU