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Forum: Honda Accord (1990 - 2002)
12-21-2009, 07:27 PM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

I would also like to hear an explanation of the physics, but it's probably going to be hard to come by.

In case you don't already know. I did read that the EVAP test only runs after the car has...
Forum: Honda Accord (1990 - 2002)
12-20-2009, 05:56 AM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

Good detective work. Where did you find this?

Question: What is the source of pressure change (pos/neg) in Steps 1,2,3?
i.e., what is the reason the pressure would change in the first 20 seconds?...
Forum: Honda Accord (1990 - 2002)
12-19-2009, 02:58 PM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

Good questions tabacka. If I had this information it would have been much easier to solve my 1456 code. There is no manual anywhere that I know of that contains the info you seek. There is very...
Forum: Honda Accord (1990 - 2002)
12-01-2009, 02:14 PM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

Well, I posted some more details about the repair here:

http://www.driveaccord.net/forums/showthread.php?p=538072#post538072

Also, I was able to repair my ORVR rather than replace it. I didn't...
Forum: Honda Accord (1990 - 2002)
09-05-2009, 06:47 PM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

I am very happy to report that the problem appears to be fixed now. Finally!

Today the readiness indicator for the evap test went green indicating ready and no codes are stored or pending. I am so...
Forum: Honda Accord (1990 - 2002)
09-04-2009, 07:57 PM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

So far no pending code, but I don't think the diagnostic ran today at all since there may not have been a long enough trip after sitting overnight.

Phootbag:
Do you know why the manual says to...
Forum: Honda Accord (1990 - 2002)
09-04-2009, 04:09 AM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

I believe you are correct and vacuum is used for the test (though I can't find a description of the diagnostic execution steps anywhere). I suspect that the bypass valve gets opened while the...
Forum: Honda Accord (1990 - 2002)
09-04-2009, 04:03 AM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

What do you mean by data list?

The 3 V figure I mentioned is what I read in the 1998 -2002 Accord factory service manual under the test procedure for DTC p1456 (11-151).

Step 16 says "Start...
Forum: Honda Accord (1990 - 2002)
09-03-2009, 08:33 PM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

I did observe vacuum at the canister on the line from the purge valve. It seems to be pulsing rather than smooth. I think it was about 10 inHg. Anyway, the problem I am observing is a lack of...
Forum: Honda Accord (1990 - 2002)
09-03-2009, 08:16 AM
Replies: 38
Views: 121,282
Posted By rjp

Re: P1456 DTC is sure difficult to solve!

Interesting. I found this excerpt from the following doc.

http://techinfo.honda.com/rjanisis/pubs/MO/AMO27070.pdf

If I convert test id 39 to hex it is 27. And lo and behold $27 is a non...
Forum: Honda Accord (1990 - 2002)
09-03-2009, 07:35 AM
Replies: 38
Views: 121,282
Posted By rjp

P1456 DTC is sure difficult to solve!

Man oh man this is a difficult DTC to troubleshoot! I have tried every test in the service manual and the updated modified tests described in Tech Bulletin 99-075 and so far no luck.

Here's what I...
Forum: For Sale
08-29-2009, 04:31 AM
Replies: 2
Views: 4,873
Posted By rjp

1998 1999 2000 2001 2002 Honda Accord Factory Service Manuals

I have two copies of genuine Honda Accord Factory Service manuals and I'd like to sell one. Both are the official bound paperback Honda Accord factory service manuals, but only the newer one covers...
Forum: Honda Accord (1990 - 2002)
08-28-2009, 11:27 AM
Replies: 14
Views: 25,494
Posted By rjp

Re: 1999 accord service manual? for sale now

I got a bit overzealous in hunting down the manual and ended up buying two of them! I plan to sell one. Both are the official bound paperback Honda Accord factory service manuals, but only the newer...
Forum: Honda Accord (1990 - 2002)
08-21-2009, 05:47 PM
Replies: 14
Views: 25,494
Posted By rjp

Re: 1999 accord service manual?

No idea. I figured it was just because of age. btw, I could not get a clear answer from Helm as to exactly what electrical diagrams are not included. Maybe most are there? Did the original have a big...
Forum: Honda Accord (1990 - 2002)
08-21-2009, 04:58 PM
Replies: 14
Views: 25,494
Posted By rjp

Re: 1999 accord service manual?

The original Helms service manual is no longer available from Helm Publishing. If you go to their website using the link you sent you will see that it clearly states if is a "digital reproduction...
Forum: Honda Accord (1990 - 2002)
08-20-2009, 06:45 PM
Replies: 14
Views: 25,494
Posted By rjp

Re: 1999 accord service manual?

Really? That's hard to believe, but I'm gonna try it right now.

Thanks.

EDIT: Tried it. Only Owner's manual is listed. I don't see any mention of Service manual.
Forum: Honda Accord (1990 - 2002)
08-20-2009, 07:16 AM
Replies: 2
Views: 6,385
Posted By rjp

p1456 evap fuel system leak

Anyone familiar with this p1456 code for evaporative fuel system leak? I understand it is typically a lose gas cap, but in my case apparently not. I have tightened the cap and code has not cleared...
Forum: Honda Accord (1990 - 2002)
08-19-2009, 04:47 PM
Replies: 14
Views: 25,494
Posted By rjp

1999 accord service manual?

I can't seem to find a 1999 Accord factory service manual anywhere. Even Helm only has copies of the originals with no electrical diagrams they say.

Any ideas where I might obtain one?
Forum: Honda Accord (1990 - 2002)
08-19-2009, 05:01 AM
Replies: 14
Views: 48,488
Posted By rjp

Re: 3rd clutch pressure switch 99 accord

Low430,

This is great news! I have the same code on my 1999 accord. I am trying to understand if it is a switch problem or a transmission problem. Is your transmission still working well, or did...
Forum: Honda Accord (1990 - 2002)
08-19-2009, 04:56 AM
Replies: 1
Views: 11,826
Posted By rjp

Re: transmission problem code P1739

I am also looking for help on this. If you find out anything let me know. I have the same code. Still shifts fine.
Forum: Honda Accord (1990 - 2002)
08-19-2009, 04:52 AM
Replies: 1
Views: 23,299
Posted By rjp

p1739 DTC code 1999 accord. Tranny defective or switch?

Hello all,

I have a p1739 trouble code (3rd clutch pressure circuit) on my 1999 Accord. I understand that the code indicates the self test of the pressure switch has failed. After reading every...
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