DTC    P0325    Knock Sensor 1 Circuit

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    P0330    Knock Sensor 2 Circuit

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

DTC    P0333    Knock Sensor 2 Circuit High Input (Bank 2)

for Preparation Click here


DESCRIPTION

A flat type knock sensor (non-resonant type) has the structure that can detect the vibration in a wider band of frequency from about 6 kHz to 15 kHz and has the following features.
Knock sensors are fitted on the right bank and left bank of the cylinder block to detect engine knocking. Each knock sensor contains a piezoelectric element which generates voltage when it becomes deformed. Generation of the voltage occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, the ignition timing is retarded in order to suppress the knocking.

DTC No.
DTC Detection Condition
Trouble Area
P0325
P0330
Knock sensor signal level remains at low for more than 10 seconds
  1. Knock sensor 1 or 2
  2. Knock sensor 1 or 2 (looseness)
  3. HV Control ECU
P0327
P0332
Output voltage of the knock sensor 1 or 2 is 0.5 V or less
  1. Short in knock sensor 1 or 2 circuit
  2. Knock sensor 1 or 2
  3. HV Control ECU
P0328
P0333
Output voltage of the knock sensor 1 or 2 is 4.5 V or more
  1. Open in knock sensor 1 or 2 circuit
  2. Knock sensor 1 or 2
  3. HV Control ECU
Reference: Inspection using the oscilloscope.
A085286E11

Item
Details
Terminal
KNK1 - EKNK
or
KNK2 - EKN2
Equipment Settings
0.01 to 10 V/Division,
0.01 to 10 msec./Division
Condition
After warming up the engine,
keep the engine speed at 4,000 rpm.
The correct waveform is as shown.

WIRING DIAGRAM


A110939E03


INSPECTION PROCEDURE

HINT:
  1. DTC P0325, P0327 and P0328 are for the bank 1 knock sensor circuit.
  2. DTC P0330, P0332 and P0333 are for the bank 2 knock sensor circuit.
  3. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

1.READ OUTPUT DTC (CHECK KNOCK SENSOR CIRCUIT)


    A079805E02

  1. Disconnect the EB1 connector.

  1. Using lead wires, connect the EB1 terminals as follows.
    Male Connector - Female Connector
    Terminal 2 - Terminal 4
    Terminal 1- Terminal 3
    Terminal 4- Terminal 2
    Terminal 3- Terminal 1

  1. Warm up the engine.

  1. Run the engine at 3,000 rpm for 10 seconds or more.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the intelligent tester ON.

  1. Select the item: Powertrain / Engine /DTC.

  1. Read DTCs.

    Result:
    Display
    		Proceed to
    DTCs same as when vehicle brought in
    P0325, P0327, P0328 → P0325, P0327, P0328
    or
    P0330, P0332, P0333 → P0330, P0332, P0333
    		A
    DTCs different from when vehicle brought in
    P0325 → P0330
    or
    P0330 → P0325
    		B
    DTCs different from when vehicle brought in
    P0327, P0328 → P0332, P0333
    or
    P0332, P0333 → P0327, P0328
    		C

  1. Reconnect the EB1 connector.



B
Go to step 4

C
Go to step 5
A


2.CHECK HARNESS AND CONNECTOR


    A073939E02

  1. Disconnect the EB1 connector.



    A081695E02

  1. Disconnect the H33 HV Control ECU connector.

  1. Measure the resistance between the wire harness side connectors.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    EB1 female connector 2 - KNK1 (H33-29)
    		Below 1 Ω
    EB1 female connector 1- EKNK (H33-28)
    EB1 female connector 4 - KNK2 (H33-21)
    EB1 female connector 3 - EKN2 (H33-20)

    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    EB1 female connector 2 or KNK1 (H33-29) - Body ground
    		10 kΩ or higher
    EB1 female connector 1 or EKNK (H33-28) - Body ground
    EB1 female connector 4 or KNK2 (H33-21) - Body ground
    EB1 female connector 3 or EKN2 (H33-20) - Body ground

  1. Reconnect the EB1 connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK HV CONTROL ECU


    A076969E02

  1. Disconnect the H33 HV Control ECU connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage between the specified ECM terminals

    Standard voltage:
    Tester Connection
    		Specified Condition
    KNK1 (H33-29) - EKNK (H33-28)
    		4.5 to 5.5 V
    KNK2 (H33-21) - EKN2 (H33-20)

  1. Reconnect the ECM connector.



NG
REPLACE HV CONTROL ECU
OK

CHECK FOR INTERMITTENT PROBLEMS 

4.CHECK KNOCK SENSOR (SENSOR INSTALLATION)


    A082791

  1. Check the installation condition of the knock sensors.

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



NG
REPAIR OR REPLACE KNOCK SENSOR
OK

REPLACE KNOCK SENSOR 

5.CHECK KNOCK CONTROL SENSOR (SENSOR RESISTANCE)


    A073938E03

  1. Disconnect the EB1 connector.

  1. Measure the resistance between the terminals of the EB1 male connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    EB1 male connector 2 - 1
    		120 to 280 kΩ
    EB1 male connector 4- 3

  1. Reconnect the EB1 connector.



OK
CHECK FOR INTERMITTENT PROBLEMS
NG


6.CHECK HARNESS AND CONNECTOR (EA1 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.



    A073938E03

  1. Disconnect the EB1 connector.



    A061031E09

  1. Disconnect the K3 or K5 knock sensor connector.

  1. Measure the resistance between the wire harness side connectors.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    EB1 male connector 2 - K3-2
    		Below 1 Ω
    EB1 male connector 1- K3-1
    EB1 male connector 4 - K5-2
    EB1 male connector 3 - K5-1

    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    EB1 male connector 2 - K3-2 or Body ground
    		10 kΩ or higher
    EB1 male connector 1- K3-1 or Body ground
    EB1 male connector 4 - K5-2 or Body ground
    EB1 male connector 3 or K5-1 - Body ground

  1. Reconnect the EB1 connector.

  1. Reconnect the knock sensor connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE KNOCK SENSOR