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:

Manual control
While using the Voice Recognition system, it is possible to select menu options by using the steering wheel controls instead of speaking voice commands. The manual control mode does not allow dialing a phone number by digits. The user may select an entry from the Phonebook or Recent Calls list ...

Cooling fan
Component Function Check 1.CHECK COOLING FAN FUNCTION With CONSULT Turn ignition switch ON. Perform “FAN” in “ACTIVE TEST” mode of “ENGINE” using CONSULT Check that cooling fan operates at low speed or high speed. Without CONSULT Activate IPDM E/R auto ...

Power supply and ground circuit
Diagnosis procedure Regarding wiring diagram information, refer to bcs-51, "wiring diagram". 1.Check fuses and fusible link Check that the following fuses and fusible link are not blown. Is the fuse blown? YES >> Replace the blown fuse or fusible link after repairing the aff ...

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