Nissan Sentra Service Manual: U1000 CAN Comm circuit

Nissan Sentra Service Manual / Steering / Steering control system / DTC/circuit diagnosis / 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

Turn the ignition switch off to on.
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:

Precaution for work
When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth. When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a ...

Refrigeration system symptoms
Trouble diagnosis for unusual pressure Diagnose using a manifold gauge whenever systemвЂ™s high and/or low side pressure(s) is/are unusual. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to above table (Ambient air temperature ...

Front disc brake
Exploded View Cap Bleeder valve Cylinder body Piston seal Piston Piston boot Upper sliding pin Lower sliding pin Sliding pin boot Bushing Torque member Apply brake fluid Apply rubber grease Disassembly and Assembly DISASSEMBLY Place a wooden block as shown, and ...