Honda Repair Questions? Ask a Mechanic for Answers ASAP
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This is usually caused by distributor or ecm. The CYP sensor is located inside the distributor. The CYP sensor harness side wire colors are Yellow and Black. Ohm the CYP sensor - specification is(NNN) NNN-NNNNohms. Scope the CYP sensor on the Yellow wire and look for a consistent AC sine wave signal. Verify the CYP sensor signal on the Yellow wire at terminal C29 of the Engine Control Module (ECM). Then compare the CYP signal with the Top Dead Center (TDC) sensor and the Crankshaft Position (CKP) sensor signals and verify there are good clean signals and there is not an erratic signal or interference on any of the signals. Verify the timing belt is aligned correctly and that the camshaft ands crankshaft keyways are not worn causing a phasing problem. Unplug the alternator and clear the code and see if it resets, if it does not reset look for AC voltage interference from a faulty diode in the alternator.
Do you mean unplug the alternator and clear the code, plug the alternator back in, start the engine, and see if the code resets? Or do you mean unplug the alternator and clear the code, do not plug the alternator back in, start the engine with the alternator unplugged, and see if the code resets? Augie
Thanks. It will take me a few days to get all these checks done, and then I'll get back to you. If we get "lost" and you don't hear from me in a few days, my E-mail is XXXXX@XXXXXX.XXX . Augie
I got a message about accepting your answer. I plan to do that, but I want to keep in contact with you until I do the checks you recommended in case I have other questions about this problem with my '98 Accord P1382 code. I cannot do the work right away because of weather and other jobs I am working on. I am also trying to get an ocsilloscope to do the 'scoping you recommended. I really appreciate your help, and I will be accepting your answer. I am afraid that once I accept your answer, I will lose contact with you about this P1382 problem, and I will not be able to tell you what I find and how it works out. OK?
Friday, Dec. 3
After clearing the P1382 code and doing each of the following, I turned the key ON to verify that the code was gone, started the engine, and got the P1382 back immediately when the engine started. I will continue to pursue the oscilloscope tests you suggested and keep you informed.
Disonnect alternator, clear codes, start engine, P1382 code returns.
Reconnect alternator, clear codes, start engine, P1382 code returns.
Check timing belt condition (less than 60,000 miles old - looks like new), alignment of cam and crank pulley and timing belt, timing belt tension, crank pulley condition, valve clearances (all less than 0.002 inches more than normal), adjusted all valves, clear codes, start engine, P1382 code returns.
Can I "Accept Answer" and still be able to communicate with you to let you know what else I find and do? Maybe I'll even find the answer and solve the problem. Then, I can let you know what it turns out to be, which may help you, too.
Can I increase the amount I agree top "pay" above $20?
Dec. 23, 2010 I am waiting for my new oscilloscope so I can complete the tests that Dan recommended. I will let you know what I find out and how I solve the problem. I plan to accept Dan's answer, especially since his answer and follow-up advice has been so thorough and beyond anything I could have found elsewhere. I will also be letting Dan know what I find out and how I solve the problem, since it seems to be an unusual situation. This is why I have not closed out this question item yet.
Feb. 28, 2011
I FINALLY got my new oscilloscope and have learned how to use it. It is quite different from any 'scope I have used before. It's a Sealey TA220 from England. With better weather, I also made some recordings from the wire side of the ECM connectors. I am going to try to send and to attach a set of dual beam recordings I got at idle (approx. 800PRM) with no accessories running. I labeled the recordings according to the sensor being recorded and the connections on the C-connector to the ECM. The recordings include the 'scope settings (e.g., voltage ranges, trace speed). I can make other recordings at other settings if you want them. Just let me know. I hope these 'scope tracings mean something to you. To me, it seems that some of the sensor signals are erratic, which may be "interpreted" by my ECM as "bad CYP sensor signal", which is causing my P1382 code.
I am going to try to paste the recordings below.
Thanks - Augie
Return to Oscilloscope Recording list
Combination oscilloscope readings
A = CKP sensor = ECM connectors C8/C9B = TDC sensor = ECM connectors C20/C9Memory 00
A = CKP sensor = ECM connectors C8/C9B = TDC sensor = ECM connectors C20/C9Memory 01
A = CKP sensor = ECM connectors C8/C9B = CYP sensor = ECM connectors C29/C9Memory 02
A = CKP sensor = ECM connectors C8/C9B = CYP sensor = ECM connectors C29/C9Memory 03
A = TDC sensor = ECM connectors C20/C9B = CYP sensor = ECM connectors C29/C9Memory 04
A = TDC sensor = ECM connectors C20/C9B = CYP sensor = ECM connectors C29/C9Memory 05
A = TDC sensor = ECM connectors C20/C9B = CYP sensor = ECM connectors C29/C9Memory 06
A = TDC sensor = ECM connectors C20/C9B = CYP sensor = ECM connectors C29/C9Memory 07
March 1, 2011
Yes, I have done the following.
After clearing the P1382 code and doing each of the following, I turned the key ON to verify that the code was gone, started the engine, and got the P1382 back immediately when the engine started.
Disconnect alternator, clear codes, start engine, P1382 code returns.
Checked timing belt condition (less than 60,000 miles old - looks like new), alignment of cam and crank pulley and timing belt, timing belt tension, crank pulley condition, valve clearances (all less than 0.002 inches more than normal), adjusted all valves, clear codes, start engine, P1382 code returns.
Is there a way to verify that the new ECM I put in is OK? Recall that when I installed the new ECM, I did not get any error codes until I drove the car several times locally and accumulated about 100-200 miles. I did not keep careful track of the number of times I drove or the total accumulated distance, because I was so happy that the codes were gone and I could adjust the idle so the car ran well when I replaced the old ECM with a new ECM from Honda.
I replaced the old ECM because the idle had become so low that the car would stall at idle, and because I got codes that I could not eliminate. I took the car to Honda, and they told me that the ECM must be replaced, which is why I got a new ECM from Honda. Also by the way, the number on the new ECM is not at all the number on the old ECM, but Honda assured me that they gave me the correct ECM. The old ECM was 37820-PAA-L10 and also was labeled with 1003-1037href="http://www.justanswer.com/honda/4a9or-honda-accord-1800-lx-code-p1382-problem-1998.html8 and the new ECM is 37820-PAA-408. My VIN is 1HGCG5542WA0164href="http://www.justanswer.com/honda/4a9or-honda-accord-1800-lx-code-p1382-problem-1998.html5.
By the way, I found out from Honda that the old ECM was a replacement for the original factory ECM. It was replaced before I purchased the car, which I got used from Honda with approximately 40,000 miles. Honda had replaced a few things before I got the car, including the ignition switch (a Honda recall, which went bad again recently and Honda replaced again.
Dan, I want to increase the amount you get for your help. Do I do that through the "Just Answer - Ask a Honda Question, Get an Answer ASAP" page?
For what is may be worth as previous information, below is a complete record of what has been happening starting before October 2010.
Beginning early October 2010 and extending for two months.
1href="http://www.justanswer.com/honda/4a9or-honda-accord-1800-lx-code-p1382-problem-1998.htmlhref="http://www.justanswer.com/honda/4a9or-honda-accord-1800-lx-code-p1382-problem-1998.html8 Honda Accord LX 4-door sedan, manual transmission, 4-cylinder F23A1 4-cylinder engine
Previous problems involving the CHECK ENGINE light turning on involved codes for the EGR system. These problems were solved once the EGR valve was replaced.
Hello welcome to just answer I am master tech and will be able to assist you today.
did you still need help on this ?
Dan and Expert,
I am not familiar with how "Just Answer" works, so am I correct that Dan and Expert are both getting my question? If so, I am all for letting both of you or anyone else respond. I appreciate your doing this for me.
Yes, I still have the same problem. I am hoping that the 'scope traces I sent will provide some help in finding the answer. I can send other 'scope and multimeter information you request. I can even put it onto my web site for you to look at as well as send it by responses like this one.
Augie (Augustine DiGiovanna)
The bonus I sent was for Dan. Did he get it? I look forward to hearing from Expert or anyone about my P1382 code problem.