Nissan Sentra manuals

Nissan Sentra Service Manual: Power supply and ground circuit

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / Power supply and ground circuit

Diagnosis Procedure

1.CHECK FUSE

Check that the following fuse is not fusing.

Is the fuse fusing?


Is the fuse fusing? YES >> Replace the fuse after repairing the applicable circuit.

NO >> GO TO 2.

2.CHECK GROUND CONNECTION

  1. Turn ignition switch OFF
  2. Check ground connection E9 and E15. Refer to GI-42, "Circuit Inspection".

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace ground connection.

3.CHECK ECM GROUND CIRCUIT

  1. Disconnect ECM harness connectors.
  2. Check the continuity between ECM harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK ECM POWER SUPPLY (MAIN)-1

  1. Reconnect ECM harness connector.
  2. Turn ignition switch ON.
  3. Check the voltage between ECM harness connector terminals.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 5.

NO >> GO TO 6.

5.CHECK ECM POWER SUPPLY (MAIN)-2

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Check the voltage between ECM harness connector terminals as per the following.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 9.

NO >> GO TO 7.

6.CHECK ECM POWER SUPPLY (MAIN) CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connectors.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.


  1. Also check harness for short to ground.

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts.

7.CHECK ECM RELAY CONTROL SIGNAL

Check the voltage between ECM harness connector terminals as per the following.

Is the inspection result normal?


Is the inspection result normal? YES >> Check Intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> GO TO 8.

8.CHECK ECM RELAY CONTROL SIGNAL CIRCUIT

  1. Turn ignition switch OFF
  2. Disconnect ECM harness connector.
  3. Disconnect IPDM E/R harness connector
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> Replace IPDM E/R. Refer to PCS-58, "Removal and Installation" (with intelligent key), PCS-58, "Removal and Installation" (without intelligent key).

NO >> Repair or replace error-detected parts.

9.CHECK IGNITION SWITCH SIGNAL

  1. Turn ignition switch ON.
  2. Check the voltage between ECM harness connector terminals.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 11.

NO >> GO TO 10.

10.CHECK IGNITION SWITCH SIGNAL CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts.

11.CHECK ECM POWER SUPPLY (BACK-UP)

Check the voltage between ECM harness connector terminals.

Is the inspection result normal?


Is the inspection result normal? YES >> Check Intermittent Incident. Refer to GI-39, "Intermittent Incident".

NO >> GO TO 12.

12.CHECK ECM POWER SUPPLY (BACK-UP) CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.


  1. Also check harness for short to ground.

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts.

Trouble diagnosis - specification value
Description The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONITOR” mode of CONSULT during normal operation of the Engin ...

U0101 can comm circuit
Description CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellen ...

Other materials:

Basic inspection
Diagnosis and repair workflow Work flow Overall sequence 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 occurred. >> GO TO 2. 2.Check symptom ...

Fuel injector and fuel tube
Exploded View Bracket Fuel tube bracket Fuel feed tube Quick connector cap Fuel tube O-ring (black) Fuel injector O-ring (green) Injector clip CAUTION: Do not remove or disassemble parts unless instructed. Removal and Installation WARNING: Put a “CAUTION: FLAM ...

Ipdm-e 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 IPDM E/R for damage, bend and loose connection (unit side and connector side). Is the inspection result normal? Yes ...

© 2014-2026 Copyright b17.nisentra.com