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Inspection Procedure

  1. INSPECT FUSE (ECU-IG) 
    1. Remove the ECU-IG fuse from the driver side J/B.
    2. Check the continuity of ECU-IG fuse.

      Resistance: Below 1 Ω 

    NG: REPLACE FUSE 

    OK: GO TO NEXT STEP 

  2. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - BODY GROUND) 
    1. Remove the distance control ECU with connector.
    2. Check the continuity between terminal SGND (D2-10) and GND (D2-12) of distance control ECU and body ground.

      Resistance: Below 1 Ω 

    Fig 1: Checking Harness And Connector (Distance Control ECU - Body Ground)
    G04494817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  3. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - BATTERY) 
    1. Measure the voltage between terminal B (D2-1) of distance control ECU and body ground.

      Voltage: 10 to 14 V 

    Fig 2: Checking Harness And Connector (Distance Control ECU - Battery)
    G04494818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE