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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:

Basic inspection
Diagnosis and repair workflow Work flow Overall sequence Detailed flow 1.Obtain information about symptom Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred. >> GO TO 2. 2.Check symptom ...

Rear combination lamp
Exploded view Rear combination lamp Rear turn signal lamp bulb Rear turn signal lamp socket LED lamp harness connector Rear combination lamp harness connector Back-up lamp bulb socket Back-up lamp bulb Removal and installation Removal Partially remove trunk side finis ...

Precaution for Brake System
WARNING: Clean any dust from the front brake and rear brake with a vacuum dust collector. Do not blow with compressed air. Brake fluid: Refer to MA-11, "Fluids and Lubricants". Do not reuse drained brake fluid. Do not spill or splash brake fluid on painted surfaces. Brake fluid ...

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