DTC U0001:88/U0100:00/U0101:00/U0121:00 [ELECTRONIC 4WD CONTROL SYSTEM]

id0302a6200800

DTC U0001:88
CAN system communication error
DTC U0100:00
Communication error to PCM
DTC U0101:00
Communication error to TCM
DTC U0121:00
Communication error to DSC HU/CM
DETECTION CONDITION
•  U0001:88
―  Open or short circuit in CAN system wiring harness is detected.
•  U0100:00
―  Communication error with PCM is detected in CAN communication.
•  U0101:00
―  Communication error with TCM is detected in CAN communication.
•  U0121:00
―  Communication error to DSC HU/CM is detected in CAN communication
FAIL-SAFE FUNCTION
•  U0001:88, U0100:00, U0121:00
―  Control disabled.
•  U0101:00
―  Lost gear position signal: AWD operates by the specified data.
―  Except above: Control disabled.
POSSIBLE CAUSE
•  CAN system wiring harness open or short circuit
•  CAN system wiring harness open or short circuit with PCM
•  CAN system wiring harness open or short circuit with TCM
•  CAN system wiring harness open or short circuit with DSC HU/CM
•  CAN system wiring harness open or short circuit with instrument cluster
•  Instrument cluster malfunction
SYSTEM WIRING DIAGRAM
Not applicable


Diagnostic procedure

•  Perform the malfunction diagnosis according to the troubleshooting procedure for the multiplex communication system. (See FOREWORD [SKYACTIV-G 2.0/2.5, SKYACTIV-D 2.2 (MTX) (L.H.D.)].) (See FOREWORD [SKYACTIV-G 2.0/2.5, SKYACTIV-D 2.2 (MTX) (R.H.D.)].) (See FOREWORD [SKYACTIV-G 2.5T, SKYACTIV-D 2.2 (ATX) (L.H.D.)].) (See FOREWORD [SKYACTIV-G 2.5T, SKYACTIV-D 2.2 (ATX) (R.H.D.)].)