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 4)
Dtc/circuit diagnosis ...
Other materials:
Dlc 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 data link connector for damage,
bend and loose connection
(connector side and harness side).
Is the inspection result ...
Diagnosis system (ipdm e/r) (without intelligent key system)
Diagnosis Description
AUTO ACTIVE TEST
Description
In auto active test, the IPDM E/R sends a drive signal to the following
systems to check their operation.
Front wiper (LO, HI)
Parking lamp
License plate lamp
Tail lamp
Front fog lamp (if equipped)
Headlamp (LO, HI)
A/C compress ...
C1142 Press sensor
DTC Logic
DTC DETECTION LOGIC
DTC
Display Item
Malfunction detected condition
Possible causes
C1142
PRESS SEN CIRCUIT
When a malfunction is detected in master cylinder
pressure sensor.
Stop lamp switch system
ABS actuator and electric unit
(co ...
