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Nissan Sentra Service Manual: P1556, P1557 Battery temperature sensor

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P1556, P1557 Battery temperature sensor

DTC Logic

DTC DETECTION LOGIC

NOTE:

If DTC P1556 or P1557 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Refer to EC-353, "DTC Logic".

DTC No.

 CONSULT screen terms (Trouble diagnosis content)

 DTC detecting condition

 Possible cause
P1556 BAT TMP SEN/CIRC (BAT TMP SEN/CIRC) Signal voltage from Battery temperature sensor remains 0.16V or less for 5 seconds or more.
  • Harness or connectors [Battery current sensor (Battery temperature sensor) circuit is shorted.]
  • Battery current sensor (Battery tem-  perature sensor)
P1557 BAT TMP SEN/CIRC (BAT TMP SEN/CIRC) Signal voltage from Battery temperature sensor remains 4.84V or more for 5 seconds or more.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

  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 10 V or more at idle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start the engine and let it idle at least 10 seconds.
  2. Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-386, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK BATTERY TEMPERATURE 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 BATTERY TEMPERATURE SENSOR POWER SUPPLY 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 ground.

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

NO >> Repair or replace error-detected parts.

3.CHECK BATTERY TEMPERATURE 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 TEMPERATURE SENSOR

Check the battery temperature sensor. Refer to EC-387, "Component Inspection".

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

NO >> Replace battery negative cable assembly.

Component Inspection

1.CHECK BATTERY TEMPERATURE SENSOR

  1. Turn ignition switch OFF.
  2. Disconnect battery current sensor.
  3. Check the resistance between battery current sensor connector terminals.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace battery negative cable assembly.

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