Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2009 Toyota Avalon LimitedFACTORY OEM SERVICE PROCEDURE

Engine Control System (2GR-FE): ECM: Removal

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTE: If the cable is disconnected, some systems need to be initialized after the cable is reconnected (See INITIALIZATION ).
REMOVE WINDSHIELD WIPER ARM AND BLADE ASSEMBLY LH (See REMOVAL )
REMOVE WINDSHIELD WIPER ARM AND BLADE ASSEMBLY RH (See REMOVAL )
REMOVE COWL TOP VENTILATOR LOUVER SUBASSEMBLY (See REMOVAL )
REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY (See REMOVAL )
REMOVE COWL TOP PANEL OUTER (See REMOVAL )
REMOVE ECM
1. Remove the 3 nuts.
  
  Fig 1: Locating ECM Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Separate the ECM from the body.
  NOTE: When separating the ECM, do not apply excessive force to the wire harness.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.