Sienna V6-3.0L (1MZ-FE) (2003)
Data Link Connector, A/T: Description and Operation
Inspect the DLC3
The vehicle's ECM uses the ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with the SAE J1962 and matches the ISO
9141-2 format.
HINT:
If the display shows "UNABLE TO CONNECT TO VEHICLE" when you have connected the cable of the scan tool (OBD II scan tool or hand-held
tester) to the DLC3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or the scan tool side.
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If the communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
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If the communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself, so consult the
Service Department listed in the tool's instruction manual.