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:

C1113, C1145, C1146 Yaw rate/side/decel G Sensor
DTC Logic DTC DETECTION LOGIC DTC Display Item Malfunction detected condition Possible causes C1113 G SENSOR When a malfunction is detected in longitunal G sensor signal. ABS actuator and electric unit (control unit) C1145 YAW RATE ...

Rear seat belt
Exploded View - Seat Belt Retractor Seat belt retractor (RH) Seat belt retractor (center) Seat belt retractor (LH) Front Removal and Installation - Seat Belt Retractor REMOVAL Remove the rear parcel shelf finisher. Refer to INT-33, "Removal and Installation". Re ...

Od off indicator lamp
Component Function Check 1.CHECK OD OFF INDICATOR LAMP FUNCTION Check OD OFF indicator lamp turns ON for approx. 2 seconds when ignition switch turns ON. Is the inspection result normal? YES >> INSPECTION END NO >> Go to TM-239, "Diagnosis Procedure". Diagnosis Proce ...

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