LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Control System (1AR-FE) - DTC P0705 - P2A00, DTC U0101) >> DTC U0101 Lost Communication with TCM >> Description

DTC U0101 Lost Communication with TCM: Description

WARNING: This page is about a different variant/trim than selected.

The Engine Control Module (ECM) intercommunicates with the Transmission Control Module (TCM) through the Controller Area Network (CAN).

If there is a problem in this intercommunication, the ECM sets a DTC.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
U0101 Following conditions are met for 1.25 seconds (1 trip detection logic):
  1. Ignition switch ON
  2. Battery voltage is 10.5 V or more
  3. No intercommunication between ECM and TCM
  • ECM to TCM circuit
  • TCM
  • ECM