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 .
OK:
DTCs other than U0100 and U0129 are not output.
NG -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
OK -- GO TO CAN COMMUNICATION SYSTEM