Nissan Sentra manuals

Nissan Sentra Service Manual: U1000 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 communicate data but selectively reads required data only.

DTC Logic

Dtc detection logic

Dtc Display item Malfunction detected condition Possible cause
U1000 Can comm circuit Eps control unit is not transmitting/receiving can communication signal for 2 seconds or more.
  • Can communication malfunction
  • EPS control unit

Dtc confirmation procedure

1.PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.Dtc reproduction procedure

With consult


  1. Turn the ignition switch off to on.

  2. Perform EPS self-diagnosis.

Is DTS U1000 detected? Yes >> proceed to diagnosis procedure. Refer to stc-30, "diagnosis procedure".

No >> inspection end.

Diagnosis Procedure

Proceed to lan-16, "trouble diagnosis flow chart".

C1609 Vehicle speed signal
DTC Logic Dtc detection logic DTC Display item Malfunction detected condition Possible cause C1609 CAN VHCL SPEED Malfunction is detected in vehicle speed sig ...

EPS Warning lamp
Component Function Check 1.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP Check that the EPS warning lamp turns ON when ignition switch turns ON. Then, EPS warning lamp turns OFF after the engin ...

Other materials:

Checking engine coolant level
Check the coolant level in the reservoir when the engine is cold. If the coolant level is below the MIN level B , add coolant to the MAX level A . If the reservoir is empty, check the coolant level in the radiator when the engine is cold. If there is insufficient coolant in the radiator, fi ...

Cleaning exterior
In order to maintain the appearance of your vehicle, it is important to take proper care of it. To protect the paint surfaces, please wash your vehicle as soon as you can: after a rainfall to prevent possible damage from acid rain. after driving on coastal roads. when contaminants suc ...

Symptom diagnosis
Multi av system Symptom table Related to audio Related to hands-free phone Before performing diagnosis, confirm that the cellular phone being used by the customer is compatible with the vehicle. It is possible that a malfunction is occurring due to a version change of th ...

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