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 MANUALSTOYOTA2006SIENNA FWD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESDYNAMIC LASER CRUISE CONTROL SYSTEMCHECK THE DLC3
2006 Toyota Sienna FWD V6-3.3L (3MZ-FE)
Check the DLC3
2006 Toyota Sienna FWD V6-3.3L (3MZ-FE)SECTION Check the DLC3
CHECK DLC3
The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
HINT: If the display shows "UNABLE TO CONNECT TO VEHICLE" when the intelligent tester is connected to the DLC3 and the ignition switch is ON, there is a problem on either the vehicle or the tool.
- If communication is normal when the tool is connected to another vehicle, check DLC3 on the original vehicle.
- If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult with the Service Department listed in the tool's instruction manual.
The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
HINT: If the display shows "UNABLE TO CONNECT TO VEHICLE" when the intelligent tester is connected to the DLC3 and the ignition switch is ON, there is a problem on either the vehicle or the tool.
- If communication is normal when the tool is connected to another vehicle, check DLC3 on the original vehicle.
- If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult with the Service Department listed in the tool's instruction manual.
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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.