AIRBAG SYSTEM TC and CG Terminal Circuit

DTC Code DTC Name
TC and CG Terminal Circuit

DESCRIPTION

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

DTCs are displayed by blinking of the SRS warning light.

Tip:

  • When multiple warning lights in the combination meter blink continuously, a short to ground in the wiring or an ECU connected to terminal TC of the DLC3 is suspected.

  • A DTC output mode signal is transmitted via CAN communication to each ECU including the airbag sensor assembly. Thus when multiple systems do not enter DTC output mode, there may be a malfunction in the ECM.

WIRING DIAGRAM

C326906E04

PROCEDURE

  1. CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM)

    1. C238361C40

      *A

      for 1NR-FE, 1ZR-FE, 2ZR-FE

      *B

      for 1ZR-FAE

      *C

      for 8NR-FTS

      *D

      for 1ND-TV

      *1

      DLC3

      *a

      Front view of wire harness connector

      (to ECM)

      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 1NR-FE, 1ZR-FE, 2ZR-FE:

      Tester Connection

      Condition

      Specified Condition

      E11-13 (TC) - A50-23 (TC)

      Always

      Below 1 Ω
      Table 2. for 1ZR-FAE:

      Tester Connection

      Condition

      Specified Condition

      E11-13 (TC) - A50-33 (TC)

      Always

      Below 1 Ω
      Table 3. for 1ND-TV:

      Tester Connection

      Condition

      Specified Condition

      E11-13 (TC) - A169-50 (TC)

      Always

      Below 1 Ω
      Table 4. for 8NR-FTS:

      Tester Connection

      Condition

      Specified Condition

      E11-13 (TC) - A173-33 (TC)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE WIRE HARNESS

    OK

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

    1. C204945C05

      *1

      DLC3

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E11-4 (CG) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE WIRE HARNESS

    OK

  3. CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)

    1. C204945C06

      *1

      DLC3

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E11-13 (TC) - Body ground

      Always

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE WIRE HARNESS OR REPLACE EACH ECU