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

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Gr-Fe Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK KNOCK SENSOR

CHECK TERMINAL VOLTAGE (ECM)

CHECK HARNESS AND CONNECTOR (KNOCK SENSOR - ECM)

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.
2 knock sensors are fitted onto the engine block to detect engine knocking.
Each 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.
DTC Detection Condition
Trouble Area
P0327
P0332
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
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 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 operating in fail-safe mode until the ignition switch is turned off.
Reference: Inspection using an oscilloscope
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-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.
0.01 to 1 msec./DIV.
Condition
Engine speed 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 5 seconds after the engine is started.
If the malfunction is not repaired successfully, DTC P0327, P0328, P0332 or P0333 is stored 5 seconds after the engine is next started.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-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 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.
  4. 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.
  5. Bank 2 refers to the bank that does not include the No. 1 cylinder.
1.CHECK KNOCK SENSOR
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    C45-94 (KNK1) - C45-93 (EKNK)
    		20°C (68°F)
    		120 to 280 kΩ
    C45-117 (KNK2) - C45-116 (EKN2)
    		20°C (68°F)
    		120 to 280 kΩ
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    C46-94 (KNK1) - C46-93 (EKNK)
    		20°C (68°F)
    		120 to 280 kΩ
    C46-117 (KNK2) - C46-116 (EKN2)
    		20°C (68°F)
    		120 to 280 kΩ
    Text in Illustration
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Rear view of wire harness connector
    (to ECM)


NG
Go to step 3
OK


2.CHECK TERMINAL VOLTAGE (ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System. Dtc P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

  1. Disconnect the CU1 connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    CU1 female connector 2 - 5
    		Ignition switch ON
    		4.5 to 5.5 V
    CU1 female connector 4 - 6
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *1
    		Female
    *a
    		Front view of wire harness connector
    (to ECM Wire)


NG
REPLACE ECM (Click here)
OK

CHECK FOR INTERMITTENT PROBLEMS (Click here)

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

  1. Disconnect the knock sensor connectors.

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    U2-2 - C45-94 (KNK1)
    		Always
    		Below 1 Ω
    U2-1 - C45-93 (EKNK)
    		Always
    		Below 1 Ω
    U1-2 - C45-117 (KNK2)
    		Always
    		Below 1 Ω
    U1-1 - C45-116 (EKN2)
    		Always
    		Below 1 Ω
    U2-2 or C45-94 (KNK1) - Body ground
    		Always
    		10 kΩ or higher
    U2-1 or C45-93 (EKNK) - Body ground
    		Always
    		10 kΩ or higher
    U1-2 or C45-117 (KNK2) - Body ground
    		Always
    		10 kΩ or higher
    U1-1 or C45-116 (EKN2) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    U2-2 - C46-94 (KNK1)
    		Always
    		Below 1 Ω
    U2-1 - C46-93 (EKNK)
    		Always
    		Below 1 Ω
    U1-2 - C46-117 (KNK2)
    		Always
    		Below 1 Ω
    U1-1 - C46-116 (EKN2)
    		Always
    		Below 1 Ω
    U2-2 or C46-94 (KNK1) - Body ground
    		Always
    		10 kΩ or higher
    U2-1 or C46-93 (EKNK) - Body ground
    		Always
    		10 kΩ or higher
    U1-2 or C46-117 (KNK2) - Body ground
    		Always
    		10 kΩ or higher
    U1-1 or C46-116 (EKN2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE KNOCK SENSOR (Click here)