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. |
|
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:
Symptom diagnosis
Squeak and rattle trouble diagnoses
Work Flow
Customer interview
Interview the customer if possible, to determine the conditions that exist
when the noise occurs. Use the Diagnostic
Worksheet during the interview to document the facts and conditions when the
noise occurs and any
custome ...
Wiper and washer fuse
Description
Diagnosis procedure
1. Check fuses
Check that the following fuses are not blown.
Is the fuse blown?
Yes >> replace the blown fuse after repairing the affected circuit.
No >> inspection end. ...
Text messaging
WARNING
Laws in some jurisdictions may restrict
the use of some of the applications and
features, such as social networking and
texting. Check local regulations for any
requirements.
Laws in some jurisdictions may restrict
the use of “Text-to-Speech”. Check loc ...
