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P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1)

AutoHex Online Help: Hyundai ACCENT(RB) 2012
Component Location
General Description

Knocking is a phenomenon characterized by undesirable vibration and noise that can cause engine damage. A knock sensor (KS) is mounted on the cylinder block and senses engine knocking. A knocking vibration from the cylinder block is applied as pressure to the piezoelectric element. A knock sensor (KS) detects vibration when RPM rises or drops and generates voltages based on this vibration. The ECM controls the ignition timing based on the amplitude and frequency of the knock sensor signal. For example, if engine knocking occurs, the ignition timing is retarded to prevent it.



DTC Description

If the number of knock sensor errors is less than the lower limit or the upper limit, ECM sets P0326.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

Case1

DTC Strategy

Signal check

Poor connection

Open or short in signal circuit

Knock sensor

Enable Conditions

Engine speed > 2440rpm

Knock control condition - active

Threshold Value

Number of knock sensor errors > upper limit orNumber of knock sensor errors < lower limit

Case2

DTC Strategy

Line check

Enable Conditions

Knock control condition - not active

Threshold Value

Short circuit to GND or battery

Diagnostic Time

Continuous

MIL ON Condition

DTC only

Diagnostic Circuit Diagram