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 DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTIONPROGRAMMING AND RELEARNINGENGINE CONTROL SYSTEM - SFI SYSTEM
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
Engine Control System - SFI System
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION Engine Control System - SFI System
REGISTRATION
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT: The VIN is a 17-digit alphanumeric vehicle identification number. The intelligent tester is required to register the VIN.
1. INPUT INSTRUCTIONS
The general VIN input instructions using the intelligent tester are shown:
a. The arrow buttons (UP, DOWN, RIGHT and LEFT) and numerical buttons (0 to 9) are used to input the VIN.
b. Cursor Operation To move the cursor around the tester screen, press the RIGHT and LEFT buttons.
c. Alphabetical Character Input
1. Press the UP and DOWN buttons to select the desired alphabetical character.
d. Numeric Character Input
1. Press the numerical button corresponding to the number that you want to input.
HINT: Numerical characters can be selected by using the UP and DOWN buttons.
e. Correction
1. When correcting the input character(s), put the cursor onto the character using the RIGHT and LEFT buttons.
2. Select or input the correct character using the UP and DOWN buttons, or the numerical buttons.
f. Finishing Input Operation
1. Make sure that the input VIN matches the vehicle VIN after input.
2. Press the ENTER button on the tester.
2. READ VIN (Vehicle Identification Number)
a. The VIN reading process is shown in the flowchart. Reading the VIN stored in the ECM is necessary when comparing it to the VIN provided with the vehicle.
b. Read the VIN using the intelligent tester.
c. Check the vehicle's VIN.
d. Connect the intelligent tester to the DLC3.
e. Turn the ignition switch to the ON position.
f. Turn the tester on.
g. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / VIN.
3. WRITE VIN
a. The VIN writing process is shown in the flowchart. This process allows the VIN to be input into the ECM. If the ECM is changed, or the ECM VIN and vehicle VIN do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.
b. Write VIN using the intelligent tester.
c. Connect the intelligent tester to the DLC3.
d. Turn the ignition switch to the ON position.
e. Turn the tester on.
f. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / VIN.
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT: The VIN is a 17-digit alphanumeric vehicle identification number. The intelligent tester is required to register the VIN.
1. INPUT INSTRUCTIONS
The general VIN input instructions using the intelligent tester are shown:
a. The arrow buttons (UP, DOWN, RIGHT and LEFT) and numerical buttons (0 to 9) are used to input the VIN.
b. Cursor Operation To move the cursor around the tester screen, press the RIGHT and LEFT buttons.
c. Alphabetical Character Input
1. Press the UP and DOWN buttons to select the desired alphabetical character.
d. Numeric Character Input
1. Press the numerical button corresponding to the number that you want to input.
HINT: Numerical characters can be selected by using the UP and DOWN buttons.
e. Correction
1. When correcting the input character(s), put the cursor onto the character using the RIGHT and LEFT buttons.
2. Select or input the correct character using the UP and DOWN buttons, or the numerical buttons.
f. Finishing Input Operation
1. Make sure that the input VIN matches the vehicle VIN after input.
2. Press the ENTER button on the tester.
2. READ VIN (Vehicle Identification Number)
a. The VIN reading process is shown in the flowchart. Reading the VIN stored in the ECM is necessary when comparing it to the VIN provided with the vehicle.
b. Read the VIN using the intelligent tester.
c. Check the vehicle's VIN.
d. Connect the intelligent tester to the DLC3.
e. Turn the ignition switch to the ON position.
f. Turn the tester on.
g. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / VIN.
3. WRITE VIN
a. The VIN writing process is shown in the flowchart. This process allows the VIN to be input into the ECM. If the ECM is changed, or the ECM VIN and vehicle VIN do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.
b. Write VIN using the intelligent tester.
c. Connect the intelligent tester to the DLC3.
d. Turn the ignition switch to the ON position.
e. Turn the tester on.
f. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / VIN.
RENDER: 1.0x
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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.