DTC U0001:88, U0100:00, U0121:00, U0140:00 OR U2121:00 [ELECTRIC POWER STEERING (EPS) CONTROL MODULE]


id0602a6015000


Outline

System malfunction location
DTC U0001:88
CAN system communication error
DTC U0100:00
Communication error to PCM
DTC U0121:00
Communication error to electronically controlled brake unit
DTC U0140:00 or U2121:00
Communication error to body control module (BCM)
Detection condition
•  U0001:88
―  Error detected in line between CAN connection module and CAN bus communication line
•  U0100:00
―  Communication error to PCM is detected in CAN communication
•  U0121:00
―  Communication error to electronically controlled brake unit is detected in CAN communication
•  U0140:00 or U2121:00
―  Communication error to body control module (BCM) is detected in CAN communication
Fail-safe
•  Refer to “Fail-safe Function Table”. (See DTC TABLE [ELECTRIC POWER STEERING (EPS) CONTROL MODULE].)
Possible cause
•  CAN system wiring harness open or short circuit with PCM
•  CAN system wiring harness open or short circuit with electronically controlled brake unit
•  CAN system wiring harness open or short circuit with body control module (BCM)
•  Poor connection at connectors
System wiring diagram
Not applicable
Connector diagram
Not applicable


Diagnostic Procedure

•  Perform the malfunction diagnosis according to the troubleshooting procedure for the multiplex communication system.(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)