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

DESCRIPTION

The power steering ECU receives signals from the ECM and the skid control ECU (ABS ECU) via the CAN communication system.





HINT: When two or more DTCs starting with [U] are output simultaneously, inspect the connectors and wire harness of each ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM DTC
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTCs other than U0100 and U0129 are not output.
NG -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
OK -- GO TO CAN COMMUNICATION SYSTEM