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 3)
Dtc/circuit diagnosis ...
Other materials:
B00A0 OCS System
Description
DTC B00A0 OCCUPANT CLASSIFICATION SYSTEM (OCS)
The OCS control unit is wired to the air bag diagnosis sensor unit. The air
bag diagnosis sensor unit will monitor
the OCS for failures and interruptions in communication between the OCS control
unit and the air bag
diagnosis sensor ...
Front fog lamp circuit
Description
The ipdm e/r (intelligent power distribution module engine room) controls the
front fog lamp relay based on
inputs from the bcm over the can communication lines. When the front fog lamp
relay is energized, power
flows from the front fog lamp relay in the ipdm e/r to the front fog ...
Interior lights
The interior light can be turned ON regardless
of door position. The light will go off after
a period of time unless the ignition switch is
placed in the ON position when any door is
opened.
The interior lights can be set to operate
when the doors are opened. To turn off the
int ...
