Nissan Sentra manuals

Nissan Sentra Service Manual: Ecm branch line circuit

Diagnosis Procedure

1.CHECK CONNECTOR

  1. Turn the ignition switch OFF.
  2. Disconnect the battery cable from the negative terminal.
  3. Check the terminals and connectors of the ECM for damage, bend and loose connection (unit side and connector side).

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair the terminal and connector.

2.Check harness for open circuit

  1. Disconnect the connector of ecm.
  2. Check the resistance between the ecm harness connector terminals.

Is the measurement value within the specification?


Is the measurement value within the specification? Yes >> go to 3.

No >> repair the ecm branch line.

3.Check power supply and ground circuit

Check the power supply and the ground circuit of the ECM. Refer to EC-164, "Diagnosis Procedure".

Is the inspection result normal? YES (Present error)>>Replace the ECM. Refer to EC-485, "Removal and Installation".

YES (Past error)>>Error was detected in the ECM branch line.

NO >> Repair the power supply and the ground circuit.

Main line between dlc and av circuit
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Other materials:

Vehicle information
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System description
Component parts AUTOMATIC DOOR LOCK/UNLOCK FUNCTION AUTOMATIC DOOR LOCK/UNLOCK FUNCTION : Component Parts Location BCM (view with instrument panel removed) Main power window and door lock/unlock switch Power window and door lock/unlock switch RH Front door lock key cylinder ...

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