Nissan Sentra manuals

Nissan Sentra Service Manual: P1550 Battery current sensor

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P1550 Battery current sensor

DTC Logic

DTC DETECTION LOGIC

DTC No.

 CONSULT screen terms (Trouble diagnosis content)

 DTC detecting condition

 Possible cause
P1550 BAT CURRENT SENSOR (Battery current sensor) The output voltage of the battery current sensor remains within the specified range while engine is running.
  • Harness or connectors (Battery current sensor circuit is open or shorted.)
  • Battery current sensor
  • Camshaft position sensor
  • Camshaft (Intake)
  • Starter motor
  • Starting system circuit
  • Dead (Weak) battery
  • Sensor power supply 1 circuit

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON
  3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and wait at least 10 seconds.
  2. Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-374, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK BATTERY CURRENT SENSOR POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect battery current sensor harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between battery current sensor harness connector and ground.

Is the inspection result normal?


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

NO >> GO TO 2.

2.CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Check sensor power supply 2 circuit. Refer to EC-444, "Diagnosis Procedure".

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

NO >> Repair or replace error-detected parts.

3.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between battery current sensor harness connector and ECM harness connector.


  1. Also check harness for short to power.

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

NO >> Repair or replace error-detected parts.

4.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT

  1. Check the continuity between battery current sensor harness connector and ECM harness connector.


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

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

NO >> Repair or replace error-detected parts

5.CHECK BATTERY CURRENT SENSOR

Check the battery current sensor. Refer to EC-375, "Component Inspection (Battery Current Sensor)".

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

NO >> Replace battery current sensor. Refer to PG-53, "Removal and Installation".

Component Inspection (Battery Current Sensor)

1.CHECK BATTERY CURRENT SENSOR

  1. Turn ignition switch OFF.
  2. Reconnect harness connectors disconnected.
  3. Disconnect battery negative cable.
  4. Install jumper cable between battery negative terminal and body ground.


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

Before measuring the terminal voltage, confirm that the battery is fully


Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-4, "How to Handle Battery".

Is the inspection result normal? YES >> INSPECTION END

NO >> Replace battery current sensor. Refer to PG-53, "Removal and Installation".

P1226 TP Sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P1226 CTP LEARNING-B1 (CTP LEARNING-B1 ...

P1551, P1552 Battery current sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P1551 BAT CURRENT SENSOR (Battery curr ...

Other materials:

Parking, license plate and tail lamps are not turned on
Description The parking, license plate and tail lamps do not turn on in with any lighting switch setting. Diagnosis procedure 1.Combination switch (lighting and turn signal switch) inspection Check the combination switch (lighting and turn signal switch). Refer to BCS-72, "Symptom Table ...

Before starting the engine
Make sure the area around the vehicle is clear. Check fluid levels such as engine oil, coolant, brake and clutch fluid(if so equipped), and windshield-washer fluid as frequently as possible, or at least whenever you refuel. Check that all windows and lights are clean. Visually inspe ...

Heater and Air Conditioner (manual) (if so equipped)
WARNING The air conditioner cooling function operates only when the engine is running. Do not leave children or adults who would normally require the assistance of others alone in your vehicle. Pets should also not be left alone. They could accidentally injure them ...

В© 2014-2025 Copyright www.nisentra.com