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

B001AIIE43

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output (for LHD: See page , for RHD: Click here.

      Result
      Result Proceed to
      DTC is not output. A
      DTC is output. for LHD B
      for RHD 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. INSPECT DLC3 (TC VOLTAGE)


    1. B001A3LE08
      Text in Illustration
      *a Front view of DLC3

      Turn the engine switch off.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E22-13 (TC) - E22-4 (CG) Engine switch on (IG) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) Click here

    OK

  4. REPLACE ECM

    SST
    09843-18040

    1. Turn the engine switch off.

    2. B001A3LE08
      Text in Illustration
      *a Front view of DLC3

      Replace the ECM (for 3UR-FE: See page , for 1VD-FTV: Click here.

    3. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

    4. Turn the engine switch to on (IG).

    5. Check that the tire pressure warning light is blinking.

      OK
      The tire pressure warning light is blinking.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part Click here.


    OK

    END

    NG

    REPLACE TIRE PRESSURE WARNING ECUAND RECEIVER Click here

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


    1. Turn the engine switch off.

    2. for 3UR-FE:

      Disconnect the A38*1 or A87*2 ECM connector.


      • *1: for LHD

      • *2: for RHD

      for 1VD-FTV w/ DPF:

      Disconnect the A85*1 or A86*2 ECM connector.


      • *1: for LHD

      • *2: for RHD

      for 1VD-FTV w/o DPF:

      Disconnect the A85 connector.

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

      Standard Resistance
      for 3UR-FE
      Tester Connection Condition Specified Condition

      E22-13 (TC) - A38-43 (TC)*1

      E22-13 (TC) - A87-43 (TC)*2

      		 Always Below 1 Ω

      E22-13 (TC) or A38-43 (TC)*1 - Body ground

      E22-13 (TC) or A87-43 (TC)*2 - Body ground

      		 Always 10 kΩ or higher
      for 1VD-FTV w/ DPF
      Tester Connection Condition Specified Condition

      E22-13 (TC) - A85-27 (TC)*1

      E22-13 (TC) - A86-27 (TC)*2

      		 Always Below 1 Ω

      E22-13 (TC) or A85-27 (TC)*1 - Body ground

      E22-13 (TC) or A86-27 (TC)*2 - Body ground

      		 Always 10 kΩ or higher
      for 1VD-FTV w/o DPF
      Tester Connection Condition Specified Condition
      E22-13 (TC) - A85-27 (TC) Always Below 1 Ω
      E22-13 (TC) or A85-27 (TC) - Body ground Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B0019IHE02
      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
      E22-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE ECM

    SST
    09843-18040

    1. Turn the engine switch off.

    2. B001A3LE08
      Text in Illustration
      *a Front view of DLC3

      Replace the ECM (for 3UR-FE: See page , for 1VD-FTV: Click here.

    3. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

    4. Turn the engine switch to on (IG).

    5. Check that the tire pressure warning light is blinking.

      OK
      The tire pressure warning light is blinking.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part Click here.


    OK

    END

    NG

    REPLACE TIRE PRESSURE WARNING ECUAND RECEIVER Click here