Lost Communication With ECM/PCM "A"
DTC U0073 Control Module Communication Bus OFFDTC 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).
Refer to the U0100 (CAN communication system).
Refer to the U0129 (CAN communication system).
Refer to the U0293 (CAN communication system).
Refer to Information Bus Testing