Electronic Power Steering System

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: U0100: Lost Communication with ECM / PCM "A"

DTC U0100 - Lost Communication with ECM / PCM "A"

DTC U0129 - Lost Communication with Brake System Control Module

DTC U0130 - Lost Communication with VGRS

DESCRIPTION

The power steering ECU assembly receives signals from the ECM and 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 U0129 only, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues system control.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Using the Techstream, check for DTCs.
NEXT -- GO TO CAN COMMUNICATION SYSTEM TROUBLESHOOTING