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
Steering gear and linkage Exploded View Outer socket Boot clamp (small diameter) Boot Boot clamp (large diameter) Inner socket Gear housing assembly Disassembly and Assembly DISASSEMBLY Loosen outer socket lock nut, and remove outer socket. CAUT ...

How to use the touch-screen
CAUTION The glass display screen may break if it is hit with a hard or sharp object. If the glass screen breaks, do not touch it. Doing so could result in an injury. To clean the display, never use a rough cloth, alcohol, benzine, thinner or any kind of solvent or paper towel with a chemic ...

Diagnosis system (combination meter)
Description COMBINATION METER SELF-DIAGNOSIS MODE The information display, speedometer and tachometer can be checked in self-diagnosis mode. STARTING COMBINATION METER SELF-DIAGNOSIS MODE NOTE: Check combination meter power supply and ground circuits if self-diagnosis mode does not star ...

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