U0001

3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: U0001: High Speed CAN Communication Circuit

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.






MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC U0001)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester ON.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
(e) Read the DTCs.
Result:






B -- GO TO RELEVANT DTC CHART
A -- REPLACE HV CONTROL ECU