P0327

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

DTC Detection Condition:

A flat type knock sensor (non-resonant type) can detect vibration in a wide band of frequency (6 kHz to 15 kHz).

The sensor, located on the cylinder block, detects spark knock. When spark knock occurs, the knock sensor picks up vibrations in a specific frequency range. When the ECM detects signal voltage in this frequency range, it retards the ignition timing to suppress the knocking. The ECM also senses background engine noise with the knock sensor and uses this noise to check for faults in the sensor.

Reference: Inspection using an oscilloscope.




The correct waveform is as given.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunctions Thresholds:

Component Operating Range:

If the output signal remains low or high for more than 10 seconds, the ECM interprets this as a fault in the knock sensor and sets a DTC.

The monitors for DTC P0327, P0328, P0332 and P0333 run after the engine is started and 5 seconds have passed.

Wiring Diagram:

Step 1-2:

Step 2(Continued)-4:

Step 5:

INSPECTION PROCEDURE

HINT:
- DTC P0327 and P0328 are for the bank 1 knock sensor circuit.
- DTC P0332 and P0333 are for the bank 2 knock sensor circuit.
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. 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.