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 tire pressure warning light blinking pattern.

WIRING DIAGRAM

A01GYPPE05

Tech Tips

If the tire pressure warning light blinks continuously, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN COMMUNICATION LINE


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG) and turn the GTS on.

    4. Enter the following menus: "CAN Bus Check" from the "System Select" screen.

    5. Check the CAN communication system (for LHD: Click here, for RHD: Click here.

      OK
      The CAN communication system is normal.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (DLC3 - HYBRID VEHICLE CONTROL ECU)


    1. Disconnect the hybrid vehicle control ECU A77 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L31-13 (TC) - A77-24 (TC) Always Below 1 Ω
      L31-13 (TC) or A77-24 (TC) - Body ground Always 10 kΩ or higher
      L31-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT DLC3 (TC VOLTAGE)


    1. A01H1CEE13
      Text in Illustration
      *a Front view of DLC3

      Connect the hybrid vehicle control ECU A77 connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L31-13 (TC) - L31-4 (CG) Power switch on (IG) 11 to 14 V

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    OK

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