LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC U0001 High Speed CAN Communication Circuit >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC U0001 High Speed CAN Communication Circuit: Description

The engine control unit and the transmission control unit are located inside the ECM (Included in HV control ECU). The engine control unit intercommunicates with the transmission control ECU with 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
U0001 Following conditions are met for 2 seconds (1 trip detection logic):
  1. Ignition switch ON
  2. Battery voltage 10.5 V or more
  3. No intercommunication between engine control ECU and HV control ECU
 HV control ECU
scientia non olet · About LEMON Manuals