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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 891 (Engine Control System (Diagnostic Codes & Symptom Tests)) >> DTC/Circuit Diagnosis >> DTC U0101: Can Comm Circuit >> On Board Diagnosis Logic

On Board Diagnosis Logic

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

This self-diagnosis has the one trip detection logic. 

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U0101
0101
Lost communication with TCM When ECM is not transmitting or receiving CAN communication signal of OBD (emission-related diagnosis) with TCM for 2 seconds or more.
  • CAN communication line between TCM and ECM
  • CAN communication line is open or shorted