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:

Door switch
With intelligent key WITH INTELLIGENT KEY : Component Function Check 1.Check function Select DOOR LOCK of BCM using CONSULT. Select DOOR SW-DR, DOOR SW-AS, DOOR SW-RL and DOOR SW-RR in DATA MONITOR mode. Check that the function operates normally according to the following conditions ...

Basic inspection
Diagnosis and repair workflow Work flow OVERALL SEQUENCE DETAILED FLOW 1.INTERVIEW FOR MALFUNCTION Find out what the customer's concerns are. >> GO TO 2. 2.SYMPTOM CHECK Verify the symptom from the customer's information. >> GO TO 3. 3.BASIC INSPECTION Check the operat ...

Precaution
Precaution for supplemental restraint system (srs) "air bag" and "seat belt pre-tensioner" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury ...

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