Are there any REAL techs who may be able to tell me...
09-10-2004, 10:48 AM
#2
Honda-Tech Member
Re: Are there any REAL techs who may be able to tell me... (BdoubleU)
The knock sensor is just a microphone of sorts. You could pull it from your motor, hook up a lab scope to it, tap it on the bench and watch a waveform appear.
Just like an O2 sensor, it will generate a voltage all on its own.
To test it though, you never make a voltage measurement. According to the Helms, after an ECU reset, if the code reappears, then you:
Check the wire to make sure it is not shorted to ground and also has continuity back to the ECU. If this checks out, try a new KS. If that doesn't solve it, try another ECU.
Just like an O2 sensor, it will generate a voltage all on its own.
To test it though, you never make a voltage measurement. According to the Helms, after an ECU reset, if the code reappears, then you:
Check the wire to make sure it is not shorted to ground and also has continuity back to the ECU. If this checks out, try a new KS. If that doesn't solve it, try another ECU.
09-12-2004, 08:50 AM
#6
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Location: fresno / merced, ca
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honda/acura knock sensors r made of ceramic disc bonded to a metal diaphragm
sensor produces an ac signal when engine knock is detected
as intensity of vibbration increase ks voltage increases
ecm/pcm retards ignition timng base on ks input
sensor produces an ac signal when engine knock is detected
as intensity of vibbration increase ks voltage increases
ecm/pcm retards ignition timng base on ks input
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