LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1997 >> LX 450 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Control >> Fuel Cut System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Cut System

  1. When checking fuel cut system, engine RPM must be monitored. Scan tool is connected to data link connector No. 3 for monitoring engine RPM. For connecting of scan tool, see IDLE SPEED & MIXTURE in ADJUSTMENTS article.
  2. Start and warm engine to normal operating temperature. Ensure the A/C and all accessories are off. Gradually increase engine RPM to maintain at least specified engine speed. See FUEL CUT SYSTEM TESTING SPECIFICATIONS  table.
    FUEL CUT SYSTEM TESTING SPECIFICATIONS

    Application Engine RPM
    LX 450/Land Cruiser 3500
  3. 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).
  4. Ensure fuel return RPM is within specification. See FUEL CUT SYSTEM SPECIFICATIONS  table. Shut engine off. Remove test equipment.
FUEL CUT SYSTEM SPECIFICATIONS (1)

Application Fuel Return RPM
LX 450/Land Cruiser 1200
(1) Check with engine at normal operating temperature and with A/C and all accessories off.
scientia non olet · About LEMON Manuals