Nissan Sentra manuals

Nissan Sentra Service Manual: U0140 Lost communication (BCM)

DTC Logic

DTC DETECTION LOGIC

DTC

CONSULT screen terms [Trouble diagnosis content]

DTC detection condition

Possible causes

U0140 LOST COMM (BCM) [Lost Communication With Body Control Module] When the ignition switch is ON, TCM is unable to receive the CAN communications signal from BCM continuously for 2 seconds or more.
  • BCM
  • Harness or connector (CAN communication line is open or shorted)

DTC CONFIRMATION PROCEDURE

1.PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT


  1. Start the engine and wait for at least 5 seconds.
  2. Check the DTC.

Is “U0140” detected? YES >> Go to TM-154, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

For the diagnosis procedure, refer to LAN-16, "Trouble Diagnosis Flow Chart".

U0141 LOST COMMUNICATION (BCM A)

DTC Logic

DTC DETECTION LOGIC

DTC

CONSULT screen terms [Trouble diagnosis content]

DTC detection condition

Possible causes

U0141 LOST COMM (BCM A) [Lost Communication With Body Control Module A] When the ignition switch is turned ON, TCM continues no reception of the CAN communication signal from IPDM E/R for 2 seconds or more.
  • IPDM E/R
  • Harness or connector (CAN communication line is open or shorted)

DTC CONFIRMATION PROCEDURE

1.PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT


  1. Start the engine and wait for at least 5 seconds.
  2. Check the DTC.

Is “U0141” detected? YES >> Go to TM-155, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

For the diagnosis procedure, refer to LAN-16, "Trouble Diagnosis Flow Chart".

DTC/Circuit diagnosis
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U0155 Lost communication (IPC)
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Other materials:

Basic inspection
Diagnosis and repair workflow Trouble diagnosis flow chart Trouble diagnosis procedure Interview with customer Interview with the customer is important to detect the root cause of can communication system errors and to understand vehicle condition and symptoms for proper trouble diagnosi ...

Removal and installation
ACCELERATOR CONTROL SYSTEM Exploded View Accelerator pedal assembly Brake pedal bracket Locating hook Locating pin Removal and Installation REMOVAL Remove instrument lower panel LH. Refer to IP-21, "Removal and Installation". Disconnect the harness connector ...

Off-road recovery
If the right side or left side wheels unintentionally leave the road surface, maintain control of the vehicle by following the procedure below. Please note that this procedure is only a general guide. The vehicle must be driven as appropriate based on the conditions of the vehicle, road and t ...

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