On Nissan Pathfinder the knock sensor is located on the top of the engine block. To replace it you need to remove the intake plenum and intake manifold.The top of the engine needs to be removed to access the knock sensor.
Its not easy task.The knock sensor is costly part and replacing knock sensor is time consuming job.
See the diagram below showing exact location on Knock Sensor.
This will help.
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The car will not start?
Car will not crank?
Car has no spark?
How to troubleshoot car battery?
How to test starter solenoid?
http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html
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How to test cars starter?
http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html
How to replace starter in car?
http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html
Its not easy task.The knock sensor is costly part and replacing knock sensor is time consuming job.
See the diagram below showing exact location on Knock Sensor.
This will help.
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For more car related problem troubleshooting:---
This are the sections, you can go through and click the link to read its troubleshooting.
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The car will not start?
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Car will not crank?
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Car has no spark?
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How to troubleshoot car battery?
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