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Home >> Infiniti >> 2014 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Automatic Transmission (Re0F10J) (DTC/Circuit Diagnosis) (Except Hybrid) (1 Of 2)) >> DTC/Circuit Diagnosis >> DTC U0121: Lost Communication (Abs) >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
DTC CONSULT screen terms
[Trouble diagnosis content]		 DTC detection condition Possible causes
U0121 LOST COMM (ABS)
[Lost Communication With Anti-Lock Brake System (ABS) Control Module]		 When the ignition switch is ON, TCM is unable to receive the CAN communications signal from ADAS control unit continuously for 2 seconds or more.
  • ADAS control unit
  • Harness or connector

    (CAN communication line is open or shorted)
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