U0121

DTC U0073 Control Module Communication Bus OFF

DTC U0105 Lost Communication with ECM

DTC U0121 Lost Communication with Anti-lock Brake System (ABS) Control Module

DESCRIPTION
The power steering ECU assembly receives signals from the HV control ECU, skid control ECU, and steering control ECU via CAN communication.





HINT:
^ When two or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.
^ If the power steering ECU assembly detects DTC U0121 only, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues system control.

WIRING DIAGRAM:

INSPECTION PROCEDURE

Step 1: