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:

The parking brake release warning continues displaying, or does not display
Description The parking brake warning is displayed while driving the vehicle even though the parking brake is released. The parking brake warning is not displayed while driving the vehicle even though the parking brake is applied. Diagnosis procedure 1.Check parking brake warning l ...

Fuel pressure
Work Procedure FUEL PRESSURE RELEASE 1.FUEL PRESSURE RELEASE With CONSULT Turn ignition switch ON. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode of “ENGINE” using CONSULT Start engine. After engine stalls, crank it two or three times to release ...

Main line between ipdm-e and dlc circuit
Diagnosis procedure 1.Check connector Turn the ignition switch off. Disconnect the battery cable from the negative terminal. Check the following terminals and connectors for damage, bend and loose connection (connector side and harness side). Harness connector e4 Harness connec ...

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