СИСТЕМА SFI, Diagnostic DTC:P0327, P0328, P0332, P0333

Информация добавлена 08-08-2017

DTC Code DTC Name
P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
P0333 Knock Sensor 2 Circuit High Input (Bank 2)

DESCRIPTION

Flat-type knock sensors (non-resonant type) have structures that can detect vibrations between approximately 5 kHz and 15 kHz.

A knock sensor is fitted onto the engine block to detect engine knocking.

The knock 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. Any occurrence of engine knocking can be suppressed by delaying the ignition timing.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) The output voltage of the knock sensor (for bank 1) is below 0.5 V (1 trip detection logic).

  • Short in knock sensor (for bank 1) circuit

  • Knock sensor (for bank 1)

  • ECM

 Comes on DTC stored
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor) The output voltage of the knock sensor (for bank 1) is higher than 4.5 V (1 trip detection logic).

  • Open in knock sensor (for bank 1) circuit

  • Knock sensor (for bank 1)

  • ECM

 Comes on DTC stored
P0332 Knock Sensor 2 Circuit Low Input (Bank 2) The output voltage of the knock sensor (for bank 2) is below 0.5 V (1 trip detection logic).

  • Short in knock sensor (for bank 2) circuit

  • Knock sensor (for bank 2)

  • ECM

 Comes on DTC stored
P0333 Knock Sensor 2 Circuit High Input (Bank 2) The output voltage of the knock sensor (for bank 2) is higher than 4.5 V (1 trip detection logic).

  • Open in knock sensor (for bank 2) circuit

  • Knock sensor (for bank 2)

  • ECM

 Comes on DTC stored

Tech Tips

When DTC P0327, P0328, P0332 or P0333 is stored, the ECM enters fail-safe mode. During fail-safe mode, the ignition timing is delayed to its maximum retardation. The ECM continues fail-safe mode until the engine switch is turned off.

Reference: Inspection using an oscilloscope

A01A4KPE02
*a KNK1 Signal Waveform
*b 1 V/DIV.
*c 1 msec./DIV.

The correct waveform is as shown.

Item Content
Terminal

KNK1 - EKNK

KNK2 - EKN2
Equipment Setting

1 V/DIV.

1 msec./DIV.
Condition Engine speed maintained at 4000 rpm with warm engine

MONITOR DESCRIPTION

If the output voltage transmitted by the knock sensor remains low or high for more than 1 second, the ECM interprets this as a malfunction in the sensor circuit, and stores a DTC.

The monitor for DTCs P0327, P0328, P0332 and P0333 begins to run when 5 seconds have elapsed since the engine was started.

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on.

  6. Start the engine and wait 5 minutes.

  7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  8. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  10. Input the DTC: P0327, P0328, P0332 or P0333.

  11. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, idle the engine for 5 minutes and check the DTC judgment result again.

WIRING DIAGRAM

A01A5MCE01
*a Knock Sensor (for Bank 1)
*b Shielded
*c Knock Sensor (for Bank 2)

CAUTION / NOTICE / HINT

Tech Tips


  • DTCs P0327 and P0328 are for the bank 1 knock sensor circuit.

  • DTCs P0332 and P0333 are for the bank 2 knock sensor circuit.

  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

  • Read freeze frame data using the GTS. 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. READ DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT)

    A01A8D1C01
    *1 Knock Sensor
    *2 ECM
    *a

    Front view of wire harness connector

    (to Knock Sensor Wire)
    *b

    Front view of wire harness connector

    (to ECM Wire)

    1. Disconnect the Cl1 connector.

    2. Using lead wires, connect the connectors as follows:

      Male Connector - Female Connector
      Terminal 2 - Terminal 4
      Terminal 5 - Terminal 6
      Terminal 4 - Terminal 2
      Terminal 6 - Terminal 5

    3. Warm up the engine.

    4. Run the engine at 3000 rpm for 10 seconds or more.

    5. Connect the GTS to the DLC3.

    6. Turn the GTS on.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


      Powertrain > Engine and ECT > Trouble Codes

    8. Read the DTCs.

      Result
      Result Proceed to

      DTC is same as when vehicle was brought in

      (for example, P0327 and P0328 are output again, or P0332 and P0333 are output again)

      		 A

      DTC is different from when vehicle was brought in

      (for example, P0327 and P0328 are output at first, but then P0332 and P0333 are output, or vice versa)

      		 B

    B

    INSPECT KNOCK SENSOR Click here

    A

  2. CHECK HARNESS AND CONNECTOR (CONNECTOR - ECM)


    1. Disconnect the Cl1 connector.

    2. Disconnect the C29 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Cl1 female connector 2 - C29-11 (KNK1) Always Below 1 Ω
      Cl1 female connector 5 - C29-12 (EKNK) Always Below 1 Ω
      Cl1 female connector 4 - C29-5 (KNK2) Always Below 1 Ω
      Cl1 female connector 6 - C29-6 (EKN2) Always Below 1 Ω
      Cl1 female connector 2 or C29-11 (KNK1) - Body ground Always 10 kΩ or higher
      Cl1 female connector 5 or C29-12 (EKNK) - Body ground Always 10 kΩ or higher
      Cl1 female connector 4 or C29-5 (KNK2) - Body ground Always 10 kΩ or higher
      Cl1 female connector 6 or C29-6 (EKN2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT ECM (VOLTAGE)


    1. A01A2PDC02
      *a

      Front view of wire harness connector

      (to ECM Wire)

      Disconnect the Cl1 connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Cl1 female connector 2 - 5 Engine switch on (IG) 4.5 to 5.5 V
      Cl1 female connector 4 - 6 Engine switch on (IG) 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPLACE ECM Click here

  4. INSPECT KNOCK SENSOR


    1. B001U2JC01
      *a

      Front view of wire harness connector

      (to Knock Sensor Wire)

      Disconnect the Cl1 connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Cl1 female connector 2 - 5 20°C (68°F) 120 to 280 kΩ
      Cl1 female connector 4 - 6 20°C (68°F) 120 to 280 kΩ
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (CONNECTOR - KNOCK SENSOR)

    Tech Tips


    • If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit of the right bank.

    • If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit of the left bank.


    1. Disconnect the Cl1 connector.

    2. Disconnect the I1 knock sensor (for bank 1) connectors.

    3. Disconnect the I2 knock sensor (for bank 2) connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Cl1 male connector 2 - I1-2 Always Below 1 Ω
      Cl1 male connector 5 - I1-1 Always Below 1 Ω
      Cl1 male connector 4 - I2-2 Always Below 1 Ω
      Cl1 male connector 6 - I2-1 Always Below 1 Ω
      Cl1 male connector 2 or I1-2 - Body ground Always 10 kΩ or higher
      Cl1 male connector 5 or I1-1 - Body ground Always 10 kΩ or higher
      Cl1 male connector 4 or I2-2 - Body ground Always 10 kΩ or higher
      Cl1 male connector 6 or I2-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE KNOCK CONTROL SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR