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 ...

Abs 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 ABS actuator and electri ...

Other materials:

Steering wheel switch for audio control (if so equipped)
Tuning switch Power on and SOURCE select switch Volume control button The audio system can be operated using the controls on the steering wheel. POWER on switch With the ignition switch in the ACC or ON position, push the SOURCE switch to turn the audio system on. SOURCE select s ...

Brake master cylinder
Exploded View Reservoir cap Oil strainer Reservoir tank Cylinder body Pin O-ring Grommet Apply brake fluid PBC (Poly Butyl Cuprysil) grease or silicone-based grease Removal and Installation REMOVAL CAUTION: Do not spill or splash brake fluid on painted surfaces. ...

Brake precautions
Vacuum assisted brakes The brake booster aids braking by using engine vacuum. If the engine stops, you can stop the vehicle by depressing the brake pedal. However, greater foot pressure on the brake pedal will be required to stop the vehicle and stopping distance will be longer. Using the bra ...

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