Nissan Sentra Service Manual: U0101 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 transmits/receives data but selectively reads required data only.
DTC Logic
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
| U0101 | LOST COMM (TCM) (Lost communication with TCM) | When ECM is not transmitting or receiving CAN communication signal of OBD (emission-related diagnosis) with TCM for 2 seconds or more. | CAN communication line between TCM and ECM |
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
- Turn ignition switch ON and wait at least 3 seconds.
- Check DTC.
Is DTC detected? YES >> Proceed to EC-168, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
Perform the trouble diagnosis for CAN communication system. Refer to LAN-16, "Trouble Diagnosis Flow Chart".
Power supply and ground circuit
Diagnosis Procedure
1.CHECK FUSE
Check that the following fuse is not fusing.
Is the fuse fusing?
YES >> Replace the fuse after repairing the applicable circuit.
NO >> GO TO 2.
...
U1001 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 excellen ...
Other materials:
Brake pedal
Exploded View
WITHOUT BRAKE PEDAL POSITION SWITCH
Snap pin
Brake pedal assembly
Brake pedal pad
Stop lamp switch
Clip
Clevis pin
Apply multi-purpose grease.
WITH BRAKE PEDAL POSITION SWITCH
Snap pin
Brake pedal assembly
Brake pedal pad
Brake pedal position switch
...
Moonroof unit assembly
Inspection
WIND DEFLECTOR
Open glass lid fully
Visually check for proper installation, damaged/deteriorated components,
or foreign objects within mechanism.
Correct as required for smooth operation.
Check for grease at the wind deflector arm (1) and pivot areas. If
necessary, apply ...
B0029 Side curtain air bag module RH
Description
DTC B0029 RH SIDE CURTAIN AIR BAG MODULE
The RH side curtain air bag module is wired to the air bag diagnosis sensor
unit. The air bag diagnosis sensor
unit will monitor for opens and shorts in detected lines to the RH side curtain
air bag module.
PART LOCATION
Refer to SRC-5, ...
