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Home >> Lexus >> 2006 >> LS 430 >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System - Diagnostics >> Diagnosis Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) 
    1. Disconnect the E2 connector from the ECM.
    2. Measure the resistance according to the value(s) in the table below.

    Standard: 

    ECM CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified condition
    TC (E2-3) - TC (D1 - 13) Always Below 1 Ω
    Fig 1: Identifying DLC3 Connector (TC) Terminals
    G03003847Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    Fig 2: Disconnecting E2 Connector From ECM
    G03003848Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - ECM) 

    OK: Go To Next Step. 

  2. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

    Standard: 

    ECM CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified condition
    CG (D1-4) - Body ground Always Below 1 Ω

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

    Fig 3: Identifying DLC3 Connector (CG) Terminals
    G03003849Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    OK: Go To Next Step. 

  3. CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

    Standard: 

    ECM CONNECTOR TERMINALS RESISTANCE

    Tester connection Condition Specified condition
    TC (D1-13) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE WIRE HARNESS AND EACH ECU 

    Fig 4: Identifying DLC3 Connector (TC) Terminals
    G03003850Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    OK: REPLACE ECM (SEE  REPLACEMENT  ) 

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