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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (UF1AE Transfer Case) >> Four Wheel Drive Control System >> TC and CG Terminal Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

HINT:

Check the condition of each related circuit connector before troubleshooting (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if the CAN communication DTC is output (See DTC CHECK/CLEAR  ).

      Result 

      RESULT DESCRIPTION

      Result Proceed to
      CAN communication system DTC is output A
      CAN communication system DTC is not output B

    B: Go to step 2 

    A:  GO TO CAN COMMUNICATION SYSTEM

  2. CHECK HARNESS AND CONNECTOR (ECM TO DLC3) 
    1. Disconnect the ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATIONS

      Tester Connection Specified Condition
      J21-13 (TC) - A6-3 (TC) Below 1 Ω
      A6-3 (TC) - Body ground 10 kΩ or higher
    3. Fig 1: Identifying ECM And DLC3 Connector Terminals
      G05318663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT) 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (DLC3 CG CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATIONS

      Tester Connection Specified Condition
      J21-4 (CG) - Body ground Below 1 Ω
    2. Fig 2: Identifying Terminal CG Of DLC3
      G05318664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (CG TERMINAL CIRCUIT) 

    OK: Go to Next Step 

  4. REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATIONS

      Tester Connection Specified Condition
      J21-13 (TC) - Body ground 10 kΩ or higher
    2. Fig 3: Identifying Terminal TC Of DLC3
      G05318665Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK HARNESS AND CONNECTOR OR CHECK EACH ECU 

    OK: REPLACE 4WD CONTROL ECU