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    P032C    Knock Sensor 3 Circuit Low

DTC    P032D    Knock Sensor 3 Circuit High

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

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

DTC    P033C    Knock Sensor 4 Circuit Low Input

DTC    P033D    Knock Sensor 4 Circuit High Input

для подготовки Нажмите здесь


DESCRIPTION

A flat type knock sensor (non-resonant type) has a structure 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 No.
DTC Detection Condition
Trouble Area
P0327
Output voltage of knock sensor (bank 1 sensor 1) is 0.5 V or less
(1 trip detection logic)
  1. Short in knock sensor (bank 1 sensor 1) circuit
  1. Knock sensor (bank 1 sensor 1)
  1. ECM
P0328
Output voltage of knock sensor (bank 1 sensor 1) is 4.5 V or more
(1 trip detection logic)
  1. Open in knock sensor (bank 1 sensor 1) circuit
  1. Knock sensor (bank 1 sensor 1)
  1. ECM
P0332
Output voltage of knock sensor (bank 2 sensor 1) is 0.5 V or less
(1 trip detection logic)
  1. Short in knock sensor (bank 2 sensor1) circuit
  1. Knock sensor (bank 2 sensor 1)
  1. ECM
P0333
Output voltage of knock sensor (bank 2 sensor 1) is 4.5 V or more
(1 trip detection logic)
  1. Open in knock sensor (bank 2 sensor1) circuit
  1. Knock sensor (bank 2 sensor 1)
  1. ECM
P032C
Output voltage of knock sensor (bank 1 sensor 2) is 0.5 V or less
(1 trip detection logic)
  1. Short in knock sensor (bank 1 sensor 2) circuit
  1. Knock sensor (bank 1 sensor 2)
  1. ECM
P032D
Output voltage of knock sensor (bank 1 sensor 2) is 4.5 V or more
(1 trip detection logic)
  1. Open in knock sensor (bank 1 sensor 2) circuit
  1. Knock sensor (bank 1 sensor 2)
  1. ECM
P033C
Output voltage of knock sensor (bank 2 sensor 2) is 0.5 V or less
(1 trip detection logic)
  1. Short in knock sensor (bank 1 sensor 1) circuit
  1. Knock sensor (bank 2 sensor 2)
  1. ECM
P032D
Output voltage of knock sensor (bank 2 sensor 2) is 4.5 V or more
(1 trip detection logic)
  1. Open in knock sensor (bank 2 sensor 2) circuit
  1. Knock sensor (bank 2 sensor1)
  1. ECM

УКАЗАНИЕ:
When any of DTCs P0327, P0328, P0332, P0333, P032C, P032D, P033C and P033D 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 engine switch is turned off.

Reference: Inspection using an oscilloscope
A150243E01
The correct waveform is as shown.
Item
Content
Terminal
KNK1 - EKNK
KNK2 - EKN2
KNK3 - EKN3
KNK4 - EKN4
Equipment Setting
0.01 to 10 V/DIV.
0.01 to 10 msec./DIV.
Condition
Keep engine speed at 4000 rpm with warm engine

MONITOR DESCRIPTION

The knock sensor, located on the cylinder block, detects spark knock. When spark knock occurs, the piezoelectric element of the sensor vibrates. When the ECM detects a voltage in this frequency range, it retards the ignition timing to suppress the spark knock.
The ECM also senses background engine noise with the knock sensor and uses this noise to check for faults in the sensor. If the knock sensor signal level is too low for more than 10 seconds, or if the knock sensor output voltage is outside the normal range, the ECM interprets this as a fault in the knock sensor and sets a DTC.

WIRING DIAGRAM


A147861E02


INSPECTION PROCEDURE

УКАЗАНИЕ:
  1. DTCs P0327 and P0328 are for the bank 1 sensor 1 knock sensor circuit.
  2. DTCs P0332 and P0333 are for the bank 2 sensor 1 knock sensor circuit.
  3. DTCs P032C and P032D are for the bank 1 sensor 2 knock sensor circuit.
  4. DTCs P033C and P033D are for the bank 2 sensor 2 knock sensor circuit.
  5. 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.

1.INSPECT KNOCK SENSOR
A150157E02

  1. Disconnect the E3 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E3-26 (KNK1) - E3-33 (EKNK)
    		20°C
    		120 to 280 kΩ
    E3-25 (KNK2) - E3-32 (EKN2)
    		20°C
    		120 to 280 kΩ
    E3-24 (KNK3) - E3-31 (EKN3)
    		20°C
    		120 to 280 kΩ
    E3-23 (KNK4) - E3-30 (EKN4)
    		20°C
    		120 to 280 kΩ



OK
Перейдите к шагу 3
NG


2.CHECK HARNESS AND CONNECTOR (ECM - KNOCK SENSOR)
A150158E01

  1. Disconnect the E3 ECM connector.

  1. Disconnect the H14, H10, H12 or H7 knock sensor connector.

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

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    E3-26 (KNK1) - H14-2
    		Always
    		Below 1 Ω
    E3-33 (EKNK) - H14-1
    		Always
    		Below 1 Ω
    E3-25 (KNK2) - H10-2
    		Always
    		Below 1 Ω
    E3-32 (EKN2) - H10-1
    		Always
    		Below 1 Ω
    E3-24 (KNK3) - H12-2
    		Always
    		Below 1 Ω
    E3-31 (EKN3) - H12-1
    		Always
    		Below 1 Ω
    E3-23 (KNK4) - H7-2
    		Always
    		Below 1 Ω
    E3-30 (EKN4) - H7-1
    		Always
    		Below 1 Ω

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    E3-26 (KNK1) or H14-2 - Body ground
    		Always
    		10 kΩ or higher
    E3-33 (EKNK) or H14-1 - Body ground
    		Always
    		10 kΩ or higher
    E3-25 (KNK2) or H10-2 - Body ground
    		Always
    		10 kΩ or higher
    E3-32 (EKN2) or H10-1 - Body ground
    		Always
    		10 kΩ or higher
    E3-24 (KNK3) or H12-2 - Body ground
    		Always
    		10 kΩ or higher
    E3-31 (EKN3) or H12-1 - Body ground
    		Always
    		10 kΩ or higher
    E3-23 (KNK4) or H7-2 - Body ground
    		Always
    		10 kΩ or higher
    E3-30 (EKN4) or H7-1 - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE KNOCK SENSOR (Нажмите здесь)  

3.INSPECT ECM


    A150303E01

  1. Turn the engine switch on (IG).

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E3-26 (KNK1) - E3-33 (EKNK)
    		Engine switch on (IG)
    		4.5 to 5.5 V
    E3-25 (KNK2) - E3-32 (EKN2)
    		Engine switch on (IG)
    		4.5 to 5.5 V
    E3-24 (KNK3) - E3-31 (EKN3)
    		Engine switch on (IG)
    		4.5 to 5.5 V
    E3-23 (KNK4) - E3-30 (EKN4)
    		Engine switch on (IG)
    		4.5 to 5.5 V



NG
REPLACE ECM (Нажмите здесь)
OK

CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)