CRUISE CONTROL SYSTEM TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the cruise control system to enter self-diagnostic mode.

Tech Tips

When a particular warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.

WIRING DIAGRAM

A00280OE16

PROCEDURE


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


    1. Disconnect the A43 ECM connector.

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

      Standard Resistance
      for 1AR-FE
      Tester Connection Condition Specified Condition
      A43-23 (TC) - F25-13 (TC) Always Below 1 Ω
      for 2GR-FE
      Tester Connection Condition Specified Condition
      A43-45 (TC) - F25-13 (TC) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - ECM)

    OK

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


    1. A002A4VC30
      *a DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F25-4 (CG) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - BODY GROUND)

    OK

  3. CHECK HARNESS AND CONNECTOR (TERMINAL TC of DLC3 - BODY GROUND)


    1. A002A4VC31
      *a DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F25-13 (TC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU