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 hvac circuit
Diagnosis Procedure 1.Check harness continuity (open circuit) Turn the ignition switch OFF. Disconnect the battery cable from the negative terminal. Disconnect the following harness connector ...

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Other materials:

Changing a flat tire
If you have a flat tire, follow the instructions below: Stopping the vehicle Safely move the vehicle off the road and away from traffic. Turn on the hazard warning flashers. Park on a level surface and apply the parking brake. Shift the manual transmission into R (Reverse), or the CVT ...

Periodic maintenance
Introduction of periodic maintenance The following tables show the normal maintenance schedule. Depending upon weather and atmospheric conditions, varying road surfaces, individual driving habits and vehicle usage, additional or more frequent maintenance may be required. Periodic maintenan ...

Basic inspection
Diagnosis and repair work flow Work flow Detailed flow 1.Obtain information about symptom Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurs. >> GO TO 2. 2.Check symptom Check the symptom based ...

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