U0121

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: U0073: Control Module Communication Bus OFF

DTC U0073 - Control Module Communication Bus OFF

DTC U0121 - Lost Communication with Anti-lock Brake System (ABS) Control Module

DESCRIPTION

The power steering ECU receives signals from the skid control ECU (ECB ECU) via CAN communication.





HINT: When 2 or more DTCs starting with [U] are output simultaneously, inspect the connectors and wire harness of each ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Using the Techstream (with CAN VIM), check for DTCs.
OK:
DTC is not output.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- GO TO CAN COMMUNICATION SYSTEM TROUBLESHOOTING