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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

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DESCRIPTION

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

DTC No.
DTC Detection Item
Inspection Area
U0073
CAN communication error (CAN bus is off)
CAN communication system
U0105
HV control ECU communication error
  1. CAN communication system
  2. HV control ECU (when U0105 only is output)
U0121
Skid control ECU communication error
  1. CAN communication system
  2. Skid control ECU (when U0121 only is output)

HINT:
  1. When two or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.
  2. 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


C104141E03


INSPECTION PROCEDURE

1.CHECK DTC (CAN COMMUNICATION SYTEM)

  1. Using the intelligent tester, check for CAN communication system DTCs (Click here).


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