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:
Antenna
Window antenna
The antenna pattern is printed inside the rear
window.
CAUTION
Do not place metalized film near the
rear window glass or attach any metal
parts to it. This may cause poor reception
or noise.
When cleaning the inside of the rear
window, be careful not to scratch or
d ...
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 ...
NISSAN Intelligent Key® battery discharge
If the battery of the NISSAN Intelligent Key® is
discharged, or environmental conditions interfere
with the Intelligent Key operation, start the engine
according to the following procedure:
Place the shift lever in the P (Park) position.
Firmly apply the foot brake.
Touch the ignitio ...
