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.

2006 Toyota Highlander Limited, AWDFACTORY OEM SERVICE PROCEDURE

Engine Control System (3MZ-FE) (Except Hybrid): ECM: Installation

INSTALL ECM BRACKET NO.2
1. Install the ECM bracket with the 2 screws.
  
  Fig 1: Installing ECM Bracket With Screws
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL ECM BRACKET NO.1
1. Install the ECM bracket with the 2 screws.
  
  Fig 2: Installing ECM Bracket With Screws
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL ECM
1. Install the 2 wire harness clamps.
2. Connect the 5 ECM connectors.
3. Install the ECM with the 2 nuts.
  Torque: 5.5 N.m (56 kgf.cm, 49 in.lbf)
INSTALL INSTRUMENT PANEL FINISH PANEL LOWER NO.2
INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY
INSTALL COWL SIDE TRIM SUB-ASSEMBLY RH

Fig 3: Installing ECM With Nuts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL FRONT DOOR SCUFF PLATE RH
CONNECT BATTERY NEGATIVE TERMINAL

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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.