Dtc U0001 High Speed Can Communication Circuit

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Gr-Fse Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0001)

DTC U0001 High Speed CAN Communication Circuit


DESCRIPTION

The engine control unit and the transmission control unit are located inside the ECM. 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 No.
DTC Detection Condition
Trouble Area
U0001
  1. Following conditions are met for 2 seconds (1 trip detection logic):
    1. Engine switch on (IG)
    2. Battery voltage is 10.5 V or more
    3. No intercommunication between engine control ECU and transmission control ECU
ECM

INSPECTION PROCEDURE

1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0001)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Power train / Engine / DTC.

  1. Read DTCs.


Result:

Display (DTC output)
Proceed to
U0001
A
U0001 and other DTCs
B


B
GO TO RELEVANT DTC CHART
A

REPLACE ECM