Nissan Sentra manuals

Nissan Sentra Service Manual: Can communication circuit

Diagnosis procedure

1.Connector inspection

  1. Turn the ignition switch off.
  2. Disconnect the battery cable from the negative terminal.
  3. Disconnect all the unit connectors on CAN communication system.
  4. 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?


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?


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

  1. Remove the ecm and the bcm.
  2. Check the resistance between the ECM terminals.


  1. Check the resistance between the bcm terminals.

Is the measurement value within the specification?


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.

  1. Turn the ignition switch off.
  2. Disconnect the battery cable from the negative terminal.
  3. Disconnect one of the unit connectors of can communication system.

Note:

Ecm and bcm have a termination circuit. Check other units first.

  1. 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:

Diagnosis description : counter system
RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are stored in the ECM memory. When the same malfunction is detected in two consecutive trips, the DTC and the freeze ...

Preparation
Special Service Tools The actual shape of the tools may differ from those illustrated here. Commercial Service Tools ...

Rear disc brake
BRAKE PAD BRAKE PAD : Inspection PAD WEAR Check pad thickness from an inspection hole on caliper body. Check using a scale if necessary. Wear limit thickness : Refer to BR-55, "Rear Disc Brake". DISC ROTOR DISC ROTOR : Inspection APPERANCE Check surface of disc rotor for unev ...

© 2014-2020 Copyright www.nisentra.com