Nissan Sentra Service Manual: Can communication circuit
Diagnosis procedure
1.CONNECTOR INSPECTION
- Turn the ignition switch OFF.
- Disconnect the battery cable from the negative terminal.
- Disconnect all the unit connectors on CAN communication system.
- Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHeck harness continuity (short circuit)
Check the continuity between the data link connector terminals.
Is the inspection result normal? Yes >> go to 3.
No >> check the harness and repair the root cause.
3.Check harness continuity (short circuit)
Check the continuity between the data link connector and the ground.
Is the inspection result normal? Yes >> go to 4.
No >> check the harness and repair the root cause.
4.Check ecm and bcm termination circuit
- Remove the ecm and the bcm.
- Check the resistance between the ECM terminals.
- Check the resistance between the bcm terminals.
Is the measurement value within the specification? Yes >> go to 5.
No >> replace the ecm and/or the bcm.
5.Check symptom
Connect all the connectors. Check if the symptoms described in the “symptom (results from interview with customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.
6.Check unit reproduction
- Perform the reproduction test as per the following procedure for each unit.
- Turn the ignition switch off.
- Disconnect the battery cable from the negative terminal.
- Disconnect one of the unit connectors of can communication system.
Note:
Ecm and bcm have a termination circuit. Check other units first.
- Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom (Results from interview with customer)” are reproduced.
Note:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>connect the connector. Check other units as per the above procedure.
Non-reproduced>>replace the unit whose connector was disconnected.
Bcm branch line circuit
Diagnosis procedure
1.Check connector
Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the bcm for damage, bend and ...
Can system (type 2)
Dtc/circuit diagnosis ...
Other materials:
Unit disassembly and assembly
Steering gear and linkage
Exploded View
Outer socket
Boot clamp (small diameter)
Boot
Boot clamp (large diameter)
Inner socket
Gear housing assembly
Disassembly and Assembly
DISASSEMBLY
Loosen outer socket lock nut, and remove outer socket.
CAUT ...
Dtc/circuit diagnosis
Power supply and ground circuit
Audio unit
AUDIO UNIT : Diagnosis Procedure
Regarding wiring diagram information, refer to av-88, "wiring diagram".
1.Check fuse
Check that the following fuses are not blown.
Are the fuses blown?
Yes >> replace the blown fuse after repairing ...
Daytime light system inoperative
Description
The daytime light system is inoperative even though the combination switch
(lighting and turn signal switch)
and parking brake switch are in the normal setting, also whenever engine is
operating.
Diagnosis procedure
1.Check daytime light operation
Perform bcm(headlamp) daytim ...
