U0121

POWER STEERING: POWER STEERING SYSTEM: U0105, U0121: Lost Communication with ECM
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) Diagnosis System.

Refer to the U0121 (CAN communication system) Diagnosis System.