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)

for Preparation Click here


DESCRIPTION

A flat type knock sensor (non-resonant type) has a structure that can detect vibrations over a wide band of frequencies: 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 No.
DTC Detection Condition
Trouble Area
P0327
P0332
Output voltage of knock sensor 1 or 2 is 0.5 V or less
(1 trip detection logic)
  1. Short in knock sensor 1 or 2 circuit
  2. Knock sensor 1 or 2
  3. ECM
P0328
P0333
Output voltage of knock sensor 1 or 2 is 4.5 V or more
(1 trip detection logic)
  1. Open in knock sensor 1 or 2 circuit
  2. Knock sensor 1 or 2
  3. ECM

HINT:
When any of DTCs P0327, P0328, P0332 and P0333 are set, 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.
A140638E01
The correct waveform is as shown.
Item
Content
Terminals
KNK1 - EKNK
or
KNK2 -EKN2
Equipment Settings
0.01 to 10 V/DIV.
0.01 to 10 ms./DIV.
Condition
Keep engine speed at 4,000 rpm with warm engine

WIRING DIAGRAM


A138968E01


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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (Click here).
1.READ OUTPUT DTC (CHECK KNOCK SENSOR CIRCUIT)


    G041090E02

  1. Disconnect the CV1 connector.

  1. Using lead wires, connect the connectors 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 the ON position and turn the intelligent tester on.

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

  1. Read the DTCs.

    Result:

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

  1. Reconnect the CV1 connector.



B
Go to step 4
A


2.CHECK WIRE HARNESS AND CONNECTOR (CONNECTOR - ECM)


    A135193E03

  1. Disconnect the CV1 connector.

  1. Disconnect the C58 (RHD) or C55 (LHD) ECM connector.

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

    Standard resistance (Check for open):
    RHD:
    Tester Connection
    		Specified Condition
    CV1 female connector 2 - KNK1 (C58-95)
    		Below 1 Ω
    CV1 female connector 1 - EKNK (C58-94)
    		Below 1 Ω
    CV1 female connector 4 - KNK2 (C58-118)
    		Below 1 Ω
    CV1 female connector 3 - EKN2 (C58-117)
    		Below 1 Ω
    LHD:
    Tester Connection
    		Specified Condition
    CV1 female connector 2 - KNK1 (C55-95)
    		Below 1 Ω
    CV1 female connector 1 - EKNK (C55-94)
    		Below 1 Ω
    CV1 female connector 4 - KNK2 (C55-118)
    		Below 1 Ω
    CV1 female connector 3 - EKN2 (C55-117)
    		Below 1 Ω

    Standard resistance (Check for short):
    RHD:
    Tester Connection
    		Specified Condition
    CV1 female connector 2 or KNK1 (C58-95) - Body ground
    		10 kΩ or higher
    CV1 female connector 1 or EKNK (C58-94) - Body ground
    		10 kΩ or higher
    CV1 female connector 4 or KNK2 (C58-118) - Body ground
    		10 kΩ or higher
    CV1 female connector 3 or EKN2 (C58-117) - Body ground
    		10 kΩ or higher
    LHD:
    Tester Connection
    		Specified Condition
    CV1 female connector 2 or KNK1 (C55-95) - Body ground
    		10 kΩ or higher
    CV1 female connector 1 or EKNK (C55-94) - Body ground
    		10 kΩ or higher
    CV1 female connector 4 or KNK2 (C55-118) - Body ground
    		10 kΩ or higher
    CV1 female connector 3 or EKN2 (C55-117) - Body ground
    		10 kΩ or higher

  1. Reconnect the CV1 connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT ECM


    A137955E01

  1. Disconnect the CV1 connector.

  1. Turn the ignition switch to the ON position.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    CV1 female connector 2 - 1
    		4.5 to 5.5 V
    CV1 female connector 4 - 3
    		4.5 to 5.5 V

  1. Reconnect the ECM connector.



NG
REPLACE ECM (Click here)
OK

CHECK FOR INTERMITTENT PROBLEMS 

4.INSPECT KNOCK SENSOR


    G042949E02

  1. Disconnect the CV1 connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    CV1 male connector 1 - 2
    		120 to 280 kΩ
    CV1 male connector 3- 4
    		120 to 280 kΩ

  1. Reconnect the CV1 connector.



OK
CHECK FOR INTERMITTENT PROBLEMS
NG


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.


    A135025E01

  1. Disconnect the CV1 connector.

  1. Disconnect the V2 and V1 knock sensor connectors.

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

    Standard resistance:
    Check for open:
    Tester Connection
    		Specified Condition
    CV1 male connector 2 - V2-2
    		Below 1 Ω
    CV1 male connector 1 - V2-1
    		Below 1 Ω
    CV1 male connector 4 - V1-2
    		Below 1 Ω
    CV1 male connector 3 - V1-1
    		Below 1 Ω
    Check for short:
    Tester Connection
    		Specified Condition
    CV1 male connector 2 or V2-2 - Body ground
    		10 kΩ or higher
    CV1 male connector 1 or V2-1 - Body ground
    		10 kΩ or higher
    CV1 male connector 4 or V1-2 - Body ground
    		10 kΩ or higher
    CV1 male connector 3 or V1-1 - Body ground
    		10 kΩ or higher

  1. Reconnect the CV1 connector.

  1. Reconnect the knock sensor connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE KNOCK SENSOR (Click here)