Nissan Versa (N17): U0100 Lost communication (ECM A)

Nissan Versa 2nd generation (N17) Service Manual / Transmission & driveline / Transaxle & transmission (TM) / U0100 Lost communication (ECM A)

DTC Logic

DTC DETECTION LOGIC

DTC Trouble diagnosis name DTC detection condition Possible causes
U0100 Lost Communication With ECM/PCM "A" When the ignition switch is ON, TCM is unable to receive the CAN communications signal from ECM continuously for 2 seconds or more.
  • ECM
  • 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 the ignition switch OFF and wait for at least 10 seconds, then perform the next test.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

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

Is "U0100" detected?

YES >> Go to TM, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

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Other materials:

Engine compartment check locations
HR16DE Engine 1. Drive belt location 2. Engine oil filler cap 3. Air cleaner 4. Brake and clutch (if so equipped) fluid reservoir 5. Fusible link 6. Battery 7. Engine coolant reservoir 8. Radiator cap 9. Engine oil dipstick 10. Windshield-washer fluid reservoir Refer to the page numb ...

Air cleaner and air duct
Exploded View 1. Clamp 2. PCV hose 3. Clamp 4. Mount rubber 5. Air duct (inlet) 6. Air cleaner body 7. Grommet 8. Air cleaner filter 9. Air cleaner cover 10. Mass air flow sensor 11. Air duct 12. Clamp Removal and Installation REMOVAL NOTE: Mass air flow sensor is removable as an assemb ...

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