I30 1996-1997

Knock Sensor

Print

Operation



Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

The Knock Sensor (KS) is a piezo-electric (pressure-sensitive) electronic device that enables the Engine Control Module (ECM) to control the ignition timing for optimum performance, and to protect the engine from potentially damaging levels of detonation. The ECM uses the KS system to test for abnormal engine noise that may indicate detonation, which is also known as spark knock.

Removal & Installation



Specific to:

Infiniti I30 1996-2001

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.


NOTE
Discard any knock sensor that has been dropped or physically damaged.



Click image to see an enlarged view

Fig. Knock Sensor (KS) location-I30 and I35

Testing



Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004


NOTE
Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

Knock Sensor Strategy

Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

The Knock Sensor (KS) system uses one or two broadband one-wire sensors. The Knock Sensor generates an AC voltage signal of varying amplitude and frequency based on the engine vibration. The amplitude and frequency are dependent upon the level of knock that the KS detects. The control module receives the KS signal through a signal circuit, and the KS ground is supplied by the engine block through the sensor housing.

Click image to see an enlarged view

Fig. Active Knock Sensor (KS) Pattern

Related Diagnostic Trouble Codes

Specific to:

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

 
label.common.footer.alt.autozoneLogo