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Home >> Toyota >> 2025 >> GR86 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (1 Of 3) & Diagnostic Codes >> Can Communication System >> DTC U1D00: Continuingly Invalid Authentication Data Received From Gateway; DTC U1D07: Continuingly Invalid Authentication Data Received From ECM/PCM PU-Bus; DTC U1D08: Continuingly Invalid Authentication Data Received From VDC PU-Bus; DTC U1D10: Continuingly Invalid Authentication Data Received From TCM PU-Bus [11/2021 - ] >> Caution / Notice / Hint
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Caution / Notice / Hint

WARNING:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTE:
  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

HINT: