U0121

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: U0105: Lost Communication with ECM

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 ECM, 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.

INSPECTION PROCEDURE

Refer to the U0105 (CAN communication system) ECM Communication Stop Mode.
Refer to the U0121 (CAN communication system) Skid Control ECU Communication Stop Mode.