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:
Warning/indicator lights
Warning
light
Name
Anti-lock Braking
System (ABS) warning
light
Brake warning light
Charge warning light
Door open warning
light
Engine oil pressure
warning light
Low fuel ...
Sensor rotor
Front sensor rotor
FRONT SENSOR ROTOR : Removal and Installation
The front wheel sensor rotor is an integral part of the wheel
hub and bearing assembly and cannot be disassembled.
Refer to FAX-8, "Removal and Installation".
Rear sensor rotor
REAR SENSOR ROTOR : Removal and Install ...
Brake booster
Exploded View
Master cylinder assembly
Brake booster
Lock nut
Clevis
Gasket
Spacer
Removal and installation
REMOVAL
Remove cowl top and cowl top extension. Refer to EXT-26, "Removal and
Installation".
Remove air duct and air cleaner case. Refer to EM-25, &qu ...