DTC U0121 [L3]
id0302a4802800
DTC
U0121
ABS/DSC communication
DETECTION CONDITION
4WD CM detects that communication signals (four-wheel speed, ABS/DSC operation condition, and coupling torque request signals) from DSC HU/CM are abnormal.
POSSIBLE CAUSE
• DSC HU/CM signals have communication error.
Diagnostic Procedure
• Inspect according to the diagnostic procedure in Section 09. (See
MULTIPLEX COMMUNICATION SYSTEM
.)