Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Gr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

READ DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT)

CHECK HARNESS AND CONNECTOR (CONNECTOR - ECM)

INSPECT ECM (VOLTAGE)

INSPECT KNOCK SENSOR

CHECK HARNESS AND CONNECTOR (CONNECTOR - KNOCK SENSOR)

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

DTC P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

DTC P0332 Knock Sensor 2 Circuit Low Input (Bank 2)

DTC 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 6 kHz and 15 kHz.
Knock sensors are 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 Code
DTC Detection Condition
Trouble Area
P0327
P0332
The output voltage of the knock sensor is below 0.5 V (1 trip detection logic).
  1. Short in knock sensor circuit
  2. Knock sensor
  3. ECM
P0328
P0333
The output voltage of the knock sensor is higher than 4.5 V (1 trip detection logic).
  1. Open in knock sensor circuit
  2. Knock sensor
  3. ECM
HINT:
When any of DTCs P0327, P0328, P0332 and P0333 are stored, the ECM enters fail-safe mode. During fail-safe mode, the ignition timing is delayed to its maximum retardation. Fail-safe mode continues until the ignition switch is turned off.
Reference: Inspection using an oscilloscope
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)
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 1 second or more, 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.
If the malfunction is not repaired successfully, DTC P0327, P0328, P0332 or P0333 is stored 5 seconds after the engine is next started.

CONFIRMATION DRIVING PATTERN

  1. Connect the intelligent tester to the DLC3.
  2. Turn the ignition switch to ON and turn the tester on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the tester on.
  6. Start the engine and wait 5 minutes.
  7. Enter the following menus: Powertrain / Engine and ECT / DTC.
  8. Read the pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. 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.

    Tester Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. If the judgment result shows INCOMPLETE or N/A, idle the engine for 5 minutes and check the DTC judgment result again.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)


INSPECTION PROCEDURE

HINT:
  1. DTCs P0327 and P0328 are for the bank 1 knock sensor circuit.
  2. DTCs P0332 and P0333 are for the bank 2 knock sensor circuit.
  3. 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.
  4. Bank 1 refers to the bank that includes No. 1 cylinder*.
    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  5. Bank 2 refers to the bank that does not include No. 1 cylinder.
1.READ DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

  1. Disconnect the CS2 connector.

  1. 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

  1. Warm up the engine.

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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the tester on.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC is same as when vehicle brought in
    (for example, P0327 and P0328 are output again, or P0332 and P0333 are output again)
    		A
    DTC is different from when vehicle brought in
    (for example, P0327 and P0328 are output at first, but then P0332 and P0333 are output, or vice versa)
    		B
Text in Illustration
*1
Knock Sensor
*2
ECM
*a
Male connector
*b
Female connector


B
Go to step 4
A


2.CHECK HARNESS AND CONNECTOR (CONNECTOR - ECM)

  1. Disconnect the CS2 connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    CS2 female connector 2 - C130-29 (KNK1)
    		Always
    		Below 1 Ω
    CS2 female connector 5 - C130-28 (EKNK)
    		Always
    		Below 1 Ω
    CS2 female connector 4 - C130-21 (KNK2)
    		Always
    		Below 1 Ω
    CS2 female connector 6 - C130-20 (EKN2)
    		Always
    		Below 1 Ω
    CS2 female connector 2 or C130-29 (KNK1) - Body ground
    		Always
    		10 kΩ or higher
    CS2 female connector 5 or C130-28 (EKNK) - Body ground
    		Always
    		10 kΩ or higher
    CS2 female connector 4 or C130-21 (KNK2) - Body ground
    		Always
    		10 kΩ or higher
    CS2 female connector 6 or C130-20 (EKN2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT ECM (VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

  1. Disconnect the CS2 connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    CS2 female connector 2 - 5
    		Ignition switch ON
    		4.5 to 5.5 V
    CS2 female connector 4 - 6
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to ECM Wire)
    *b
    		Female


NG
REPLACE ECM (HILUX_TGN26 RM000000VW202KX.html)
OK

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0TSX.html)

4.INSPECT KNOCK SENSOR
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

  1. Disconnect the CS2 connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    CS2 male connector 2 - 5
    		20°C (68°F)
    		120 to 280 kΩ
    CS2 male connector 4 - 6
    		20°C (68°F)
    		120 to 280 kΩ
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Knock Sensor Wire)
    *b
    		Male


NG
Go to step 5
OK

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0TSX.html)

5.CHECK HARNESS AND CONNECTOR (CONNECTOR - KNOCK SENSOR)
HINT:
  1. If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit on the right bank side.
  2. If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit on the left bank side.

  1. Disconnect the CS2 connector.

  1. Disconnect the knock sensor connectors.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    CS2 male connector 2 - S1-2
    		Always
    		Below 1 Ω
    CS2 male connector 5 - S1-1
    		Always
    		Below 1 Ω
    CS2 male connector 4 - S2-2
    		Always
    		Below 1 Ω
    CS2 male connector 6 - S2-1
    		Always
    		Below 1 Ω
    CS2 male connector 2 or S1-2 - Body ground
    		Always
    		10 kΩ or higher
    CS2 male connector 5 or S1-1 - Body ground
    		Always
    		10 kΩ or higher
    CS2 male connector 4 or S2-2 - Body ground
    		Always
    		10 kΩ or higher
    CS2 male connector 6 or S2-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE KNOCK SENSOR (HILUX_TGN26 RM000000VWH027X.html)