Electronic Power Steering System

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

DTC U0122 Lost Communication with Vehicle Dynamics Control Module

DTC U0130 Lost Communication with VGRS

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

U0073-U0122/U130:

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: