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HOMESERVICE MANUALSTOYOTA2000TACOMA REGULAR CAB 2WD L4-2.4L (2RZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESCHECK DLC3
2000 Toyota Tacoma Regular Cab 2WD L4-2.4L (2RZ-FE)

Check DLC3

2000 Toyota Tacoma Regular Cab 2WD L4-2.4L (2RZ-FE)SECTION Check DLC3





Check the DLC 3







The vehicle's ECM uses the ISO 9141-2 communication protocol. The terminal arrangement of the DLC 3 complies with SAE J1962 and matches the ISO 9141-2 format.

HINT: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the OBD II scan tool or TOYOTA hand-held tester to the DLC 3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or tool side.
- If communication is normal when the tool is connected to another vehicle, inspect the DLC 3 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, so consult 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.