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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DLC3 (TC TERMINAL VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage of the DLC3.

      Standard voltage: 10 to 14 V 

    OK:  Go to step  3

    NG: Go to next step 

    Fig 1: Identifying DLC3 Connector Terminals
    G04966273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND) 
    1. Check for open and short circuit in harness and connector between terminal CG of DLC3 and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

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

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND) 
    1. Check for open and short circuit in harness and connector between terminal TC of DLC3 and ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

      NG REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU 

      OK: Go to next step 

      CHECK AND REPLACE ECM 

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