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 MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWDIAGNOSTIC STRATEGIESHOW TO PROCEED WITH TROUBLESHOOTING
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
How to Proceed With Troubleshooting
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION How to Proceed With Troubleshooting
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
^ The ECM of this system is connected to the CAN and multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication systems.
^ The intelligent tester can be used at steps 3, 4, 6, and 9.
HINT:
^ The ECM of this system is connected to the CAN and multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication systems.
^ The intelligent tester can be used at steps 3, 4, 6, and 9.
Step 1-7(Part 1):
Step 7(Part 2)-13(Part 1):
Step 13(Part 2)-20:
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.