Nissan Versa (N17): U1000 Can COMM circuit

Nissan Versa 2nd generation (N17) Service Manual / Transmission & driveline / Transaxle & transmission (TM) / U1000 Can COMM circuit

Description

CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independently). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

DTC DETECTION LOGIC

DTC Trouble diagnosis name DTC detection condition Possible causes

U1000

CAN Communication Line When the ignition switch is ON, TCM cannot send the CAN communication signal continuously for 2 seconds or more. 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.CHECK DTC DETECTION

With CONSULT

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

Is "U1000" detected?

YES >> Go to TM "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

U0300 Can communication data

Description CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excelle ...

U1117 Lost communication (ABS)

Description CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellen ...

Other materials:

Push-button ignition switch (if so equipped)
WARNING Do not operate the push-button ignition switch while driving the vehicle except in an emergency. (The engine will stop when the ignition switch is pushed 3 consecutive times in quick succession or the ignition switch is pushed and held for more than 2 seconds.) If the engine stops ...

Diagnosis and repair work flow
Work Flow OVERALL SEQUENCE *1 SRC "Diagnosis Description" *2 SRC "SRS Operation Check" *3 SRC "Trouble Diagnosis with CONSULT" *4 SRC "Trouble Diagnosis without CONSULT" DETAILED WORK FLOW 1.CUSTOMER INFORMATION Get detailed information from the c ...

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