TIRE PRESSURE WARNING SYSTEM TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals 13 (TC) and 4 (CG) of the DLC3. The DTCs are indicated by the blinking of the tire pressure warning light.

WIRING DIAGRAM

A01VFS1E01

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output.


      Result
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output (w/o Toyota Safety Sense) B
      CAN communication system DTC is output (w/ Toyota Safety Sense) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC (C2179/79)


    1. Check if DTC C2179/79 is output Click here.

      Result
      Result Proceed to
      DTC C2179/79 is not output. A
      DTC C2179/79 is output. B

    B

    GO TO DTC C2179/79 Click here

    A

  3. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)


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


      • *1: for 1KR-FE

      • *2: for 1NR-FE

      • *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 1NR-FE)
      Tester Connection Condition Specified Condition
      F4-13 (TC) - A58-23 (TC) Always Below 1 Ω
      F4-13 (TC) or A58-23 (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
      (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

  4. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)


    1. A01VFL7E01
      Text in Illustration
      *a Front view of 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

  5. INSPECT DLC3 (TC VOLTAGE)


    1. A01VG9GE01
      Text in Illustration
      *a Front view of DLC3

      Connect the ECM connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F4-13 (TC) - F4-4 (CG) Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for 1KR-FE) B
      NG (for 1NR-FE) C
      OK (for 1ND-TV without DPF) D
      OK (for 1ND-TV with DPF) E

    A

    REPLACE PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPLACE ECM Click here

    E

    REPLACE ECM Click here