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

A01ENYDE07

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 engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine 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 Click here.

      OK
      The CAN communication system is normal.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (DLC3 - ECM)


    1. Disconnect the ECM A38 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E22-13 (TC) - A38-16 (TC) Always Below 1 Ω
      E22-13 (TC) or A38-16 (TC) - Body ground Always 10 kΩ or higher
      E22-4 (CG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT DLC3 (TC VOLTAGE)


    1. A01ERP8E14
      Text in Illustration
      *a Front view of DLC3

      Connect the ECM A38 connector.

    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

    REPLACE ECM Click here

    OK

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