SFI SYSTEM, Diagnostic DTC:P0327

DTC Code DTC Name
P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

DESCRIPTION

The flat type knock sensor (non-resonant type) has a structure that can detect vibration in a wider band of frequencies, from approximately 5 to 15 kHz, and has the following features:


This occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, the ignition timing is retarded to suppress it.

DTC No. DTC Detection Condition Trouble Area
P0327 Knock sensor output voltage is below normal range (3 trip detection logic)

  • Open or short in knock sensor circuit

  • Knock sensor

  • Knock sensor looseness

  • ECM

Tech Tips

If the ECM detects DTC P0327, it enters fail-safe mode in which the corrective retard angle value is set to the maximum value.

WIRING DIAGRAM

A01VH0SE01

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

DTC P0327 is detected when the vehicle is driven at approximately 110 km/h (68 mph) for 1 minute or more (at an engine speed of 3200 rpm or more, with an engine load of 50.25% or more, and the transaxle gear selector lever in the 5th position) after warm-up.

CAUTION / NOTICE / HINT

Note

Perform electronic throttle learning after replacing the ECM Click here.

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECM - KNOCK SENSOR)


    1. Disconnect the ECM connector.

    2. Disconnect the knock sensor connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      B87-17 (KNK1) - B92-1 Always Below 1 Ω
      B87-18 (EKNK) - B92-2 Always Below 1 Ω
      B87-17 (KNK1) or B92-1 - Body ground Always 10 kΩ or higher
      B87-18 (EKNK) or B92-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT KNOCK SENSOR (SENSOR INSTALLATION)


    1. Check the knock sensor installation.

      Torque:
      20 N*m  { 204 kgf*cm, 15 ft.*lbf }

    NG

    SECURELY REINSTALL SENSOR

    OK

  3. CONFIRM MALFUNCTION DISAPPEARS WHEN A NORMAL KNOCK SENSOR IS INSTALLED


    1. Replace the knock sensor with a new one.

      Torque:
      20 N*m  { 204 kgf*cm, 15 ft.*lbf }

    2. Perform the driving test.


      1. Drive the vehicle at an engine speed of 3200 rpm or more, with an engine load of 50% or more for 1 minute or more after warm-up.

        CAUTION:

        When performing the confirmation driving pattern, obey all speed limits and traffic laws.

        Tech Tips

        Example: The vehicle is driven at approximately 110 km/h (70 mph) in 5th gear.

      2. Wait for approximately 10 minutes or more, and then start the engine.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC.

    7. Read the pending DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0327 is output B

    A

    REPLACE KNOCK SENSOR Click here

    B

    REPLACE ECM Click here