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Search: Posts Made By: BuddyGuy
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Forum: Honda Accord (1990 - 2002)
11-15-2011, 11:28 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

Over the weekend, I had the time to get at the Bypass Solenoid that's above the gas tank.

My procedure:
1. Disconnected ground from battery.
2. Relieved fuel pressure at filter...
3. Removed...
Forum: Honda Civic / Del Sol (1992 - 2000)
08-09-2011, 06:12 AM
Replies: 1
Views: 5,761
Posted By BuddyGuy

Re: 99-00 Civic, Location of EVAP Bypass Solenoid

:(

I hope I'm not the only one who's ever had to do this...
Forum: Honda Civic / Del Sol (1992 - 2000)
08-05-2011, 10:45 AM
Replies: 1
Views: 5,761
Posted By BuddyGuy

99-00 Civic, Location of EVAP Bypass Solenoid

Hi everyone,

I know that the EVAP bypass solenoid (and two-way valve) are near the fuel tank... does anyone know if you need to drop the tank to get at it? Is this a job doable with just a...
Forum: Honda Accord (1990 - 2002)
08-02-2011, 11:23 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

Hmmm, I'll have to buy a set of extended test leads..

Nope.. only P1457.
Forum: Honda Accord (1990 - 2002)
08-02-2011, 09:51 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

Could it be a shorted bypass valve (as per the above TSB) causing problems in the PCM's ground circuit (which would explain why the PCS is not opening)? Or am I SOL with this PCM?
Forum: Honda Accord (1990 - 2002)
08-01-2011, 04:29 PM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

I just did the "in-gear" test, with it in 2nd gear, running to about 4k rpm / 60kph, and my back-probed PCS line stayed more or less within 12V +/- 1.5V. I repeated the test 3 times just to make...
Forum: Honda Accord (1990 - 2002)
07-31-2011, 07:31 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

Update: I did the bi-directional test on the Purge solenoid, and I got 0.334A, with a click in the solenoid when I grounded the other lead (didn't test to see if the valve opened)... I also hooked up...
Forum: Honda Accord (1990 - 2002)
07-30-2011, 06:45 PM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

Sounds good... should I do the bidirectional test with the meter on the purge solenoid first (I really hope it isn't broken, since I've just replaced it with a brand new Honda OEM part) before doing...
Forum: Honda Accord (1990 - 2002)
07-30-2011, 04:51 PM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

I'll have to pick up a back probe set (since my meter didn't come with one), but I see where you are going with this..

With the connector hoooked up to the solenoid, I should see the battery...
Forum: Honda Accord (1990 - 2002)
07-30-2011, 04:41 PM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

That is a good point, and I thought perhaps there is a ground short in the PCS line (for example, the PCS wire is touching the body somewhere along the way to the PCM), but I unplugged the A harness...
Forum: Honda Accord (1990 - 2002)
07-29-2011, 11:11 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

Hmmm ok... I'll give that a go.

The reason why I went down the other route, is because according to the service manual (the actual Honda one), after I had tested the vacuum on the purge control...
Forum: Honda Accord (1990 - 2002)
07-29-2011, 10:40 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

I'll give it a go when I get home...

But I don't believe I'm seeing battery voltage on the PCS line... I measured voltage between IG1 and PCS (not IG1 and body and PCS and body, I stuck one probe...
Forum: Honda Accord (1990 - 2002)
07-29-2011, 06:54 AM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

According the official service manual, there are two wires in the Purge Solenoid connector, IG1 (blk/yel) and PCS (red/yel). IG1 appears to be wired into the main relay (which means that there will...
Forum: Honda Accord (1990 - 2002)
07-28-2011, 08:31 PM
Replies: 25
Views: 95,550
Posted By BuddyGuy

Re: P1456/P1457 Codes

I think my 99 Civic has fallen victim to this...

Troubleshooting so far:

P1457 MIL thrown....
Tested Vent Shut Valve, doesn't hold vacuum when ignition on, and does when A4 connected to body...
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