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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (DTC/Circuit Diagnosis) (1 Of 2) >> Transmission (TCM) >> U0140 Lost Communication (BCM) >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC CONSULT screen terms(Trouble diagnosis content) DTC detection condition
U0140 LOST COMM (BCM) (Lost Communication With Body Control Module) Diagnosis condition When the ignition switch is ON
Signal CAN communication signal
Threshold TCM is unable to receive the CAN communications signal from BCM
Diagnosis delay time Continuously for 2 seconds or more

POSSIBLE CAUSE 

FAIL-SAFE 

Not changed from normal driving