SFI SYSTEM, Diagnostic DTC:P0326

DTC Code DTC Name
P0326 Knock Sensor 1 Circuit Range / Performance Bank 1 or Single Sensor

DESCRIPTION

The knock control sensor is fitted onto the engine block to detect engine knocking. The knock control sensor contains a piezoelectric element which generates a voltage when it becomes deformed.

The voltage is generated when the engine block vibrates due to knocking. The occurrence of engine knocking can be suppressed by delaying the ignition timing.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0326

Knock Sensor 1 Circuit Range / Performance Bank 1 or Single Sensor

No knock control sensor signal to ECM.

  • Knock control sensor

  • Wire harness or connector

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

If the output voltage transmitted by the knock control sensor remains low or high, the ECM interprets this as a malfunction in the sensor circuit, and stores a DTC.

WIRING DIAGRAM

A330033E01

PROCEDURE

  1. CHECK SENSOR INSTALLATION (KNOCK CONTROL SENSOR)

    1. Check the knock control sensor installation condition.

      OK

      Knock control sensor is installed correctly.

    Result

    Proceed to

    OK

    NG
    NG

    SECURELY REINSTALL KNOCK CONTROL SENSOR

    Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (KNOCK CONTROL SENSOR - ECM)

    1. Disconnect the knock control sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B46-1 - B55-15 (KNK1)

      Always

      Below 1 Ω

      B46-2 - B55-27 (EKNK)

      Always

      Below 1 Ω

      B46-1 or B55-15 (KNK1) - Body ground and other terminals

      Always

      10 kΩ or higher

      B46-2 or B55-27 (EKNK) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE KNOCK CONTROL SENSOR

    1. Replace the knock control sensor.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0326)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for a few minutes.

    6. Perform the drive test.

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / Engine / Trouble Codes.

    9. Check for DTCs.

      Powertrain > Engine > Trouble Codes

    Result

    Result

    Proceed to

    DTCs are not output

    A

    DTC P0326 is output

    B
    A

    END

    B

    REPLACE ECM

    Click here