Subject	Knock sensor is very high resistance. 584 ohms is too
Posted by	jzack on December 06, 2018 at 8:49 PM
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In Reply To	need some advise with code 34, please posted by wh0sjeff on December 06, 2018 at 08:20 PM
Message	low. Think more like 500k ohms. The knock sensor is basically a crystal element that when vibrated generates a small voltage. The right vibration (ping) creates a signal the ECU recognizes so it can take action. This link explains how to test: [ http://www.zhome.com/ZCMnL/PICS/detonationSensor/detonationSensor.html ] The sensor is grounded through its mounting bolt — so only 1 wire on harness plug (sensor side) gets tested — ground your meters other resistance test lead to body ground (or negative terminal of battery). FYI - the reason the resistor trick works, the knock connector harness on ECU side of things is a two wire connector with 1 wire being ground.
Follow Ups	need some advise with code 34, please - wh0sjeff 20:20:03 12/06/18 Knock sensor is very high resistance. 584 ohms is too - jzack 20:49:52 12/06/18 Re: Knock sensor is very high resistance. 584 ohms is too - wh0sjeff 20:55:57 12/06/18 4v can’t destroy that type of sensor. Is your engine all - jzack 21:08:18 12/06/18 Also may want to take a look at this updated knock - jzack 21:17:52 12/06/18 Relocation kit: - Bernie (NoVA) 23:41:12 12/13/18
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