Nissan Versa (N17): U0101 can comm circuit

Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an onvehicle 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. Trouble diagnosis name (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 (emissionrelated 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, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

Power supply and ground circuit

Diagnosis Procedure 1.CHECK GROUND CONNECTION Turn ignition switch OFF. Check ground connection E. Refer to Ground Inspection in GI, "Circuit Inspection". Is the inspection re ...

U1001 CAN comm circuit

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

Other materials:

Maintenance under severe operating conditions
The maintenance intervals shown on the preceding pages are for normal operating conditions. If the vehicle is mainly operated under severe driving conditions as shown below, more frequent maintenance must be performed on the following items as shown in the table. Severe driving conditions ...

P0731 1GR Incorrect ratio
Description This malfunction is detected when the A/T does not shift into 1GR position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc. DTC ...

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