Toyota Celica, Corolla, ECHO & MR2 1999-05

Adjustments

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Idle Speed



  1. Idle speed adjustment is performed under the following conditions:

    Engine at normal operating temperature.
     
    Air cleaner installed.
     
    Air pipes and hoses of the air induction and EGR systems properly connected.
     
    All vacuum lines and electrical wires connected and plugged in properly.
     
    SFI system wiring connectors fully plugged
     
    All electrical accessories in the OFF position.
     
    Ignition timing set correctly
     
    Transaxle in the N position.
     

  2.  
  3. Connect the hand held OBD II scan tool to the DLC3 under the drivers side lower dash panel.
  4.  
  5. Race the engine idle speed to 2500 rpm for approximately 90 seconds with the cooling fan off.
  6.  
  7. Check the idle speed. If the speed is not correct, check the Idle Air Control (IAC) system.
  8.  
  9. Disconnect the OBD II scan tool.
  10.  



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Fig.

Idle speed is maintained by the Powertrain Control Module (PCM). No adjustment is necessary or possible.

 
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