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.
| DTC No. | DTC Detection Item | Inspection Area |
| U0105 | ECM communication error | CAN communication system ECM (when only U0105 is output) |
| U0121 | Skid control ECU communication error | CAN communication system Skid control ECU (when only U0121 is output) |
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.