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Nissan Sentra B18 (2020-2025) Service Manual: P0327 Ks

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0327

KNOCK SEN/CIRC-B1

(Knock sensor 1 circuit low bank 1 or single sensor)

Diagnosis condition

Engine running at idle

Signal (terminal)

Knock sensor signal

Threshold

An excessively low voltage from the sensor is sent to ECM

Diagnosis delay time

—

POSSIBLE CAUSE

  • Harness or connectors (The knock sensor circuit is open or shorted.)

  • Knock sensor

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

    >>

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE

    1. Start the engine and let it idle for at least 5 seconds.

    2. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES >>

    Proceed to DTC Diagnosis Procedure.

    NO-1 >>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2 >>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK KNOCK SENSOR GROUND CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect knock sensor harness connector.

    3. Disconnect ECM harness connector.

    4. Check the continuity between knock sensor harness connector and ECM harness connector.

      Knock sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F62

      1

      F24

      62

      Existed

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

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair or replace malfunctioning part.

  2. CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT

    1. Check the continuity between knock sensor harness connector and ECM harness connector.

      Knock sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F62

      2

      F24

      63

      Existed

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

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace malfunctioning part.

  3. CHECK KNOCK SENSOR

    Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace knock sensor. Refer to Exploded View.

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