Lost Communication with HV ECU - Electronic Power Steering System

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: U0073,U0100,U0129,U0293: Control Module Communication Bus OFF

DTC U0073 - Control Module Communication Bus OFF

DTC U0100 - Lost Communication with ECM / PCM "A"

DTC U0129 - Lost Communication with Skid Control ECU

DTC U0293 - Lost Communication with HV ECU

DESCRIPTION

The power steering ECU assembly receives signals from the hybrid vehicle 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 U0129 only, it adjusts the amount of power assistance for driving at a speed of 100 km/h (62 mph) and continues system control.

INSPECTION PROCEDURE

Refer to the U0073 (CAN communication system) How to Proceed With Troubleshooting.
Refer to the U0100 (CAN communication system) Testing and Inspection.
Refer to the U0129 (CAN communication system) Testing and Inspection.
Refer to the U0293 (CAN communication system) Testing and Inspection.