Nissan Sentra Service Manual: U1000 CAN Comm circuit
Description
CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle multiplex communication system with high data communication speed and excellent error detection ability.
Many electronic control units are equipped into vehicles, and each control unit shares information and links with other control units during operation. With CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits and receives data but selectively reads required data only. Refer to LAN-30, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart".
DTC Logic
DTC DETECTION LOGIC
| CONSULT name | DTC | DTC detecting condition | Repair order |
| CAN COMMUNICATION FAILURE | U1000 | When air bag diagnosis sensor unit is not transmitting or receiving CAN communication signals for 2 or more seconds. | Refer to SRC-43, "Diagnosis Procedure". |
DTC CONFIRMATION PROCEDURE
1.PERFORM SELF-DIAGNOSIS
- Turn ignition switch ON and wait for 7 seconds or more.
- Using CONSULT, perform SELF-DIAGNOSIS RESULTS of AIR BAG.
- Check if any DTC is displayed in the self-diagnosis results.
Is DTC detected? YES >> Refer to SRC-43, "Diagnosis Procedure".
NO >> Refer to GI-39, "Intermittent Incident".
Diagnosis Procedure
1.CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to LAN-16, "Trouble Diagnosis Flow Chart".
>> Inspection End.
U1010 Control unit (CAN)
Description
Air bag diagnosis sensor performs self-tests on key ON. If CAN communication
failure within control unit is
detected, DTC is set.
DTC Logic
DTC DETECTION LOGIC
CONSULT name ...
Other materials:
ECU diagnosis information
A/C AUTO AMP
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
*:With manual A/C
ECM, IPDM E/R, BCM
List of ECU Reference
...
P0116 ECT Sensor
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0116
ECT SEN/CIRC
(Engine coolant temperature
sensor 1 circuit range/performance)
The comparison result of signals transmitted
t ...
Moonroof switch
Removal and installation
REMOVAL
Remove the map lamp. Refer to INL-52, "Removal and Installation".
Release the pawls and remove the moonroof switch finisher (1).
: Pawl
Release the pawls and remove the moonroof switch (2).
: Pawl
INSTALLATION
Installation is in the ...
