CRUISE CONTROL SYSTEM TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic mode. If a malfunction is present, DTCs will be output.

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

A01EP51E05
A01EPKAE06

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (DLC3 - ECM AND BODY GROUND)

    A01ESAAE03

    1. for 1UR-FE:


      1. Disconnect the A53 ECM connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E22-13 (TC) - A53-16 (TC) Always Below 1 Ω
        E22-4 (CG) - Body ground
        E22-13 (TC) - Body ground Always 10 kΩ or higher
    2. A01ERMHE02

      for 3UR-FE:


      1. Disconnect the A38*1 or A53*2 ECM connector.


        • *1: for LHD

        • *2: for RHD

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

        Standard Resistance
        for LHD
        Tester Connection Condition Specified Condition
        E22-13 (TC) - A38-16 (TC) Always Below 1 Ω
        E22-4 (CG) - Body ground
        E22-13 (TC) - Body ground Always 10 kΩ or higher
        for RHD
        Tester Connection Condition Specified Condition
        E22-13 (TC) - A53-16 (TC) Always Below 1 Ω
        E22-4 (CG) - Body ground
        E22-13 (TC) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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