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Nissan Sentra Service Manual: 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 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
U1001 CAN COMM CIRCUIT (CAN communication circuit) When ECM is not transmitting or receiving CAN communication signal other than OBD (emission related diagnosis) for 2 seconds or more. Harness or connectors (CAN communication line is open or shorted)

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

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

Is 1st trip DTC detected? YES >> Proceed to EC-169, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

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 excellen ...

P0011  IVT  control
DTC Logic DTC DETECTION LOGIC NOTE: If DTC P0011 is displayed with DTC P0075, first perform the trouble diagnosis for EC-180, "DTC Logic". DTC No. CONSULT screen terms (Tr ...

Other materials:

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 ...

Service data and specifications (SDS)
Idle speed *: Under the following conditions A/C switch: OFF Electric load: OFF (Lights, heater fan & rear window defogger) Steering wheel: Kept in straight-ahead position Ignition timing *: Under the following conditions A/C switch: OFF Electric load: OFF (Lights, hea ...

Front door
Door assembly Door assembly : removal and installation CAUTION: Use two people when removing or installing the front door assembly due to its heavy weight. When removing and installing front door assembly, support front door using a suitable tool. Do not use air tools or electric to ...

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