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Home >> Lexus >> 2004 >> LX 470 >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Engine Mechanical >> Idle Speed >> Inspection

Idle Speed: Inspection

  1. INITIAL CONDITIONS 
    1. Engine is at normal operating temperature
    2. Air cleaner is installed
    3. All pipes and hoses of air induction systems are connected
    4. All accessories are switched OFF
    5. All vacuum lines are properly connected

      HINT:

      All vacuum hoses should be properly connected.

    6. SFI system wiring connectors are fully plugged
    7. Ignition timing is set correctly
    8. Transmission is in neutral position
    9. Air conditioning switches are OFF
  2. CONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL (See  IGNITION TIMING  ) 
  3. INSPECT IDLE SPEED 
    1. Race the engine speed at 2,500 rpm for approx. 90 seconds.
    2. Check the idle speed.
      1. Idle speed: 700 +/- 50 rpm 

      If the idle speed is not as specified, check the air intake system.

  4. DISCONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL 
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