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:
Push-button ignition switch illumination circuit
Description
Provides the power supply and the ground to control the push-button ignition
switch illumination.
Component function check
1.Check push-button ignition switch illumination operation
Consult active test
Turn the ignition switch ON.
Select engine sw illumi of bcm (intelligen ...
Battery terminal with fusible link
Exploded view
Battery terminal with fusible link
Harness connector
Removal and installation
Removal
Loosen the battery terminal nuts and disconnect both battery negative and
positive terminals. Refer to
pg-50, "exploded view".
Caution:
To prevent damage to the parts, di ...
Manual operation
Fan speed control
Press the fan control buttons to
manually
control the fan speed.
Press the AUTO button to return to automatic
control of the fan speed.
Air recirculation
Press the air recirculation
button to recirculate
interior air inside the vehicle. The
indicator light on the b ...
