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.
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HOMESERVICE MANUALSTOYOTA2007HIGHLANDER 2WD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIR
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
Engine Control Module: Service and Repair
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION Service and Repair
REMOVAL
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE FRONT DOOR SCUFF PLATE RH
3. REMOVE COWL SIDE TRIM SUB-ASSEMBLY RH
4. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY
5. REMOVE INSTRUMENT PANEL FINISH PANEL LOWER NO.2
6. REMOVE ECM
a. Remove the 2 wire harness clamps.
b. Disconnect the 5 ECM connectors.
c. Remove the 2 nuts and ECM.
7. REMOVE ECM BRACKET NO.1
a. Remove the 2 screws and ECM bracket.
8. REMOVE ECM BRACKET NO.2
a. Remove the 2 screws and ECM bracket.
INSTALLATION
1. INSTALL ECM BRACKET NO.2
a. Install the ECM bracket with the 2 screws.
2. INSTALL ECM BRACKET NO.1
a. Install the ECM bracket with the 2 screws.
3. INSTALL ECM
a. Install the 2 wire harness clamps.
b. Connect the 5 ECM connectors.
c. Install the ECM with the 2 nuts.
Torque: 5.5 N.m ( 56 kgf.cm, 49 in.lbf)
4. INSTALL INSTRUMENT PANEL FINISH PANEL LOWER NO.2
5. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY
6. INSTALL COWL SIDE TRIM SUB-ASSEMBLY RH
7. INSTALL FRONT DOOR SCUFF PLATE RH
8. CONNECT BATTERY NEGATIVE TERMINAL
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE FRONT DOOR SCUFF PLATE RH
3. REMOVE COWL SIDE TRIM SUB-ASSEMBLY RH
4. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY
5. REMOVE INSTRUMENT PANEL FINISH PANEL LOWER NO.2
6. REMOVE ECM
a. Remove the 2 wire harness clamps.
b. Disconnect the 5 ECM connectors.
c. Remove the 2 nuts and ECM.
7. REMOVE ECM BRACKET NO.1
a. Remove the 2 screws and ECM bracket.
8. REMOVE ECM BRACKET NO.2
a. Remove the 2 screws and ECM bracket.
INSTALLATION
1. INSTALL ECM BRACKET NO.2
a. Install the ECM bracket with the 2 screws.
2. INSTALL ECM BRACKET NO.1
a. Install the ECM bracket with the 2 screws.
3. INSTALL ECM
a. Install the 2 wire harness clamps.
b. Connect the 5 ECM connectors.
c. Install the ECM with the 2 nuts.
Torque: 5.5 N.m ( 56 kgf.cm, 49 in.lbf)
4. INSTALL INSTRUMENT PANEL FINISH PANEL LOWER NO.2
5. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY
6. INSTALL COWL SIDE TRIM SUB-ASSEMBLY RH
7. INSTALL FRONT DOOR SCUFF PLATE RH
8. CONNECT BATTERY NEGATIVE TERMINAL
RENDER: 1.0x
NO RELATED
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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.