ECU/Wiring Knock Sensor
04-19-2002, 08:29 PM
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ECU/Wiring Knock Sensor
Car: '95 Integra GSR
Situation: After throwing a CEL (code 23 - Knock Sensor), I wasn't sure if it was my wiring to the KS, or the KS itself.
Action: To eliminate the variables I decided to run a wire (18g) straight from my ECU (pin D3) to the harness that plugs onto my KS. I noticed that the KS wire from the ECU entered into a "loop" of wires. I guessed that this was a ground that grounded all wires coming from the D connector out of the ECU. I simply ran the new wire from the D3 pin before the "loop".
Upon removal of the original KS, I discovered that it was damaged. I'm currently waiting for my new KS from Acura.
Question: Will my direct wire connection from the ECU to the KS cause any problems after I install the new KS?
I figured that when Honda swaps are performed, esp B18C's into Civics with a P72 ECU, a KS must be directly wired into the ECU anyway.
04-20-2002, 05:54 AM
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Re: ECU/Wiring Knock Sensor (CR-X)
if you mean you can just run a straight wire from the ecu not through the harness then yes. you can do it with no problem
04-20-2002, 08:28 AM
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Re: ECU/Wiring Knock Sensor (rainforest)
Even a wire that is not shielded? I've heard I have a 50/50 chance of it working without a shielded wire.
I noticed when the harness was unplugged from the KS that the wire was "pierced" about 1/2 inch away from the harness do to strain. By seeing visible wire I figured it might be pinched somewhere else too. That's what prompted me to run a hardwire to the ECU to try to avoid any other wire problems. But now it seems the wire might be a problem again because it is not shielded...I'll find out when I replace the KS. Sounds like I have a 50/50 chance of this wire working.
I noticed when the harness was unplugged from the KS that the wire was "pierced" about 1/2 inch away from the harness do to strain. By seeing visible wire I figured it might be pinched somewhere else too. That's what prompted me to run a hardwire to the ECU to try to avoid any other wire problems. But now it seems the wire might be a problem again because it is not shielded...I'll find out when I replace the KS. Sounds like I have a 50/50 chance of this wire working.
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