Yaris 2007

Electronic Control Module

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Initialization



Specific to:

Toyota Yaris 2007-2010

  1. Perform the initialization:
    1. Disconnect the cable from the negative (-) battery terminal. Wait at least 60 seconds and reconnect the cable.
    2.  
    3. Turn the ignition switch to ON without operating the accelerator pedal.
      NOTE
      If the accelerator pedal is operated, perform the above steps again.

    4.  
    5. Connect the Techstream to the DLC3 and clear the DTC-s.
    6.  
    7. Start the engine and check that the MIL is not illuminated and that the idle speed is within the specified range when the A/C is switched off after the engine is warmed up.
      NOTE
      Be sure to perform this step with all accessories off. Make sure that the shift lever is in neutral.



      Standard (for Automatic Transaxle): With A/C switched off, engine idle speed should be at 650 to 750 RPM.
       
      Standard (for Manual Transaxle): With A/C switched off, engine idle speed should be at 550 to 650 RPM.
       

    8.  
    9. Enter the following menus: Powertrain / Engine and ECT / Data List / Throttle Sensor Position. Fully depress the accelerator pedal and check that the value is 60% or more.
    10.  
    11. Perform a road test and confirm that there are no abnormalities.
    12.  

  2.  

Location



Specific to:

Toyota Yaris 2007-2010

Refer to the accompanying illustration.

Click image to see an enlarged view

Fig. Locating the ECM

Removal & Installation



Specific to:

Toyota Yaris 2007-2010

  1. Remove the wiper motor and link assembly
  2.  
  3. Remove front air shutter seal (for Sedan). Disengage the 3 claws and remove the front air shutter seal.

    Click image to see an enlarged view

    Fig. Disengage the 3 claws and remove the front air shutter seal

  4.  
  5. Remove cowl top panel outer (for hatchback):
    1. Disengage the wire harness clamp.
    2.  
    3. Remove the 9 bolts and remove the cowl top panel outer.
    4.  

  6.  
  7. Remove cowl top panel outer (for sedan):
    1. Disengage the claw and disconnect the wire harness.
    2.  
    3. Remove the 2 bolts and remove the cowl top panel outer center bracket.
    4.  
    5. Remove the 8 bolts and remove the cowl top panel outer.
    6.  

  8.  
  9. Remove ECM:
    1. Remove the 2 lock knobs and harness clamp.
    2.  
    3. Disconnect the 2 ECM connectors.
    4.  
    5. Remove the bolt and 2 nuts and remove the ECM.
    6.  

  10.  
  11. To install, reverse the removal procedure.
  12.  
  13. Perform initialization.

    Click image to see an enlarged view

    Fig. Remove the 2 lock knobs and harness clamp



    Click image to see an enlarged view

    Fig. Remove the bolt and 2 nuts and remove the ECM

  14.  

 
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