POWER STEERING SYSTEM, Diagnostic DTC:U0100, U0129

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0129 Lost Communication with Brake System Control Module

DESCRIPTION

The power steering ECU assembly receives signals from the ECM and skid control ECU via CAN communication.

DTC No. DTC Detection Item Inspection Area
U0100 ECM communication error

  • CAN communication system

  • ECM (when only U0100 is output)
U0129 Skid control ECU communication error

  • CAN communication system

  • Skid control ECU (when only U0129 is output)

Tech Tips


  • When 2 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.

INSPECTION PROCEDURE

Refer to the U0100 (CAN communication system) Click here.

Refer to the U0129 (CAN communication system) Click here.