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Home >> Lexus >> 2002 >> LX 470 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System >> Fuel Control >> Fuel Cut System
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Fuel Cut System

  1. Connect scan tool to data link connector No. 3. See Figure. Scan tool is used to read engine RPM. Start engine and warm engine to normal operating temperature. Ensure A/C is off. Gradually increase engine to 2500 RPM
  2. Using stethoscope, check for fuel injector operating sound. Ensure when throttle lever is released, fuel injector stops operating momentarily and then resumes operating (fuel return RPM). Ensure fuel return RPM is 1000 RPM. Shut engine off. Remove scan tool.
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