Nissan Sentra manuals

Nissan Sentra Service Manual: U0101 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 error 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 independent). 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 No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause
U0101 LOST COMM (TCM) (Lost communication with TCM) When ECM is not transmitting or receiving CAN communication signal of OBD (emission-related diagnosis) with TCM for 2 seconds or more. CAN communication line between TCM and ECM

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON and wait at least 3 seconds.
  2. Check DTC.

Is DTC detected? YES >> Proceed to EC-168, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

Perform the trouble diagnosis for CAN communication system. Refer to LAN-16, "Trouble Diagnosis Flow Chart".

Power supply and ground circuit
Diagnosis Procedure 1.CHECK FUSE Check that the following fuse is not fusing. Is the fuse fusing? YES >> Replace the fuse after repairing the applicable circuit. NO >> GO TO 2. ...

U1001 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 excellen ...

Other materials:

Unit disassembly and assembly
Center console assembly Exploded View Center console upper finisher Center console side finisher (RH) Center console side finisher (LH) Center console side finisher screw cover (LH/RH) Center console assembly Center console screw cover (LH/RH) Center console rear finisher C ...

Control panel buttons — color screen with Navigation System (if so equipped)
WARNING Positioning of the heating or air conditioning controls and display controls should not be done while driving in order that full attention may be given to the driving operation. Do not disassemble or modify this system. If you do, it may result in acciden ...

U1010 control unit (can)
Description Initial diagnosis of combination meter. Dtc logic Dtc detection logic Dtc Display contents of consult Detection condition Possible malfunction U1010 CONTROL UNIT (CAN) [U1010] When detecting error during the initial diagnosis of the can controlle ...

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