Lexus IS250 IS220d GSE20 ALE20 - POWER STEERING
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.
INSPECTION PROCEDURE
Refer to the U0105 (CAN communication system (4GR-FSE LHD)) .
Refer to the U0105 (CAN communication system (4GR-FSE RHD)) .
Refer to the U0105 (CAN communication system (2AD-FHV LHD)) .
Refer to the U0105 (CAN communication system (2AD-FHV RHD)) .
Refer to the U0121 (CAN communication system (4GR-FSE LHD)) .
Refer to the U0121 (CAN communication system (4GR-FSE RHD)) .
Refer to the U0121 (CAN communication system (2AD-FHV LHD)) .
Refer to the U0121 (CAN communication system (2AD-FHV RHD)) .