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 ...

Power control system
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Other materials:

Component parts
Component parts location Combination meter Combination switch (lighting and turn signal switch) Key switch (without intelligent key system) Push-button ignition switch (with intelligent key system) Seat belt buckle switch lh Front door switch lh Bcm (view with instrument pane ...

Component parts
Engine control system ENGINE CONTROL SYSTEM :Component Parts Location Engine room compartment No. Component Function 1 IPDM E/R IPDM E/R control the internal relays and the actuators. When CAN communication with ECM is impossible, IPDM E/R performs fail-sa ...

Symptom diagnosis
Audio system Symptom table Related to audio Related to hands-free phone Before performing diagnosis, confirm that the cellular phone being used by the customer is compatible with the vehicle. It is possible that a malfunction is occurring due to a version change of the phone ...

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