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:

Hood
Pull the hood lock release handle 1 located below the instrument panel until the hood springs up slightly. Locate the lever 2 in between the hood and grille and push the lever sideways with your fingertips. Raise the hood 3 . Remove the support rod 4 and insert it into the slo ...

Warning/indicator lights and audible reminders
Anti-lock Braking System (ABS) warning light Brake warning light Charge warning light Door open warning light Engine oil pressure warning light Low fuel warning light Low tire pressure warning light Low windshield-washer fluid warning light NISSAN Intelligent Key® lock warni ...

Parking brake shoe
Adjustment - Drum Brake If equipped with drum brakes, refer to PB-11, "Inspection and Adjustment". Adjustment - Disc Brake Adjust parking brake lever stroke. Refer to PB-4, "Inspection and Adjustment". Perform parking brake break-in (drag on) operation by d ...

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