Nissan Sentra manuals

Nissan Sentra Service Manual: U1000 CAN Comm circuit

Description

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle multiplex communication system with high data communication speed and excellent error detection ability.

Many electronic control units are equipped into vehicles, and each control unit shares information and links with other control units during operation. With CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits and receives data but selectively reads required data only. Refer to LAN-30, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart".

DTC Logic

DTC DETECTION LOGIC

CONSULT name

DTC

DTC detecting condition

Repair order

CAN COMMUNICATION FAILURE U1000 When air bag diagnosis sensor unit is not transmitting or receiving CAN communication signals for 2 or more seconds. Refer to SRC-43, "Diagnosis Procedure".

DTC CONFIRMATION PROCEDURE

1.PERFORM SELF-DIAGNOSIS

  1. Turn ignition switch ON and wait for 7 seconds or more.
  2. Using CONSULT, perform SELF-DIAGNOSIS RESULTS of AIR BAG.
  3. Check if any DTC is displayed in the self-diagnosis results.

Is DTC detected? YES >> Refer to SRC-43, "Diagnosis Procedure".

NO >> Refer to GI-39, "Intermittent Incident".

Diagnosis Procedure

1.CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to LAN-16, "Trouble Diagnosis Flow Chart".

>> Inspection End.

DTC/Circuit diagnosis
...

U1010 Control unit (CAN)
Description Air bag diagnosis sensor performs self-tests on key ON. If CAN communication failure within control unit is detected, DTC is set. DTC Logic DTC DETECTION LOGIC CONSULT name ...

Other materials:

U1117 Lost communication (ABS)
DTC Logic DTC DETECTION LOGIC DTC CONSULT screen terms [Trouble diagnosis content] DTC detection condition Possible causes U1117 LOST COMM (ABS) [Lost Communication With ABS] When the ignition switch is ON, TCM is unable to receive the CAN communications ...

Dome light
The interior light has a three-position switch and operates regardless of ignition switch position. When the switch is in the ON position 1 , the interior lights illuminate, regardless of door position. The lights will go off after a period of time unless the ignition switch is placed in ...

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system ...

© 2014-2022 Copyright www.nisentra.com