?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
04-20-2011, 06:16 AM
#26
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04-20-2011, 06:23 AM
#27
Re: ?????? ODD NO START SOMETIMES ????????
04-20-2011, 06:31 AM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Just to confirm what I did..I plugged Main Relay back in and bolted it back up. I unpluged 2 connectors from the ECU (A and B) now with connector (A) I located (A16)yellow with green strip, .. I then ran a wire to the ground terminal on battery to A16's ... I did NOT hear the fuel pump prime.
04-20-2011, 06:35 AM
#29
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
A16 pins to a Grn/Yel wire not a Yel/Grn wire. Double check how you are viewing the connector. It is probably a mirror image of the diagram when viewed face on.
04-20-2011, 06:43 AM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
lol Damn Ron you are the man! you were right I was wrong, I was looking at it wrong. Ok Now I did do this test correctly now.. And YES the fuel pump primes and main relay clicks.
04-20-2011, 06:50 AM
#31
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
^Good.
Next tests are done under the same conditions - main relay connector plugged in, ECU connectors A and B unplugged:
1) Key in ON(II) -- At terminals A11 and A24 (Yel/Blk wires), check individually for battery voltage to body ground.
2) Key OFF -- At terminals A9 and A22 (Brn/Blk wires), check individually for continuity to body ground.
Next tests are done under the same conditions - main relay connector plugged in, ECU connectors A and B unplugged:
1) Key in ON(II) -- At terminals A11 and A24 (Yel/Blk wires), check individually for battery voltage to body ground.
2) Key OFF -- At terminals A9 and A22 (Brn/Blk wires), check individually for continuity to body ground.
04-20-2011, 07:08 AM
#32
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
^Good.
Next tests are done under the same conditions - main relay connector plugged in, ECU connectors A and B unplugged:
1) Key in ON(II) -- At terminals A11 and A24 (Yel/Blk wires), check individually for battery voltage to body ground.
2) Key OFF -- At terminals A9 and A22 (Brn/Blk wires), check individually for continuity to body ground.
Next tests are done under the same conditions - main relay connector plugged in, ECU connectors A and B unplugged:
1) Key in ON(II) -- At terminals A11 and A24 (Yel/Blk wires), check individually for battery voltage to body ground.
2) Key OFF -- At terminals A9 and A22 (Brn/Blk wires), check individually for continuity to body ground.
Test #2 Passed.. I got continuity threw both A9 and A22.
04-20-2011, 08:43 AM
#33
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Start by verifying your finding by testing for the lack of end-to-end continuity between main relay terminal 6 and ECU plug A11 and A24 (individually). Also test for continuity between A11 and A24. If there is no continuity, the broken wire can be pinpointed by doing additional end-to-end continuity tests at two connectors (C101 and C130) that are located in between the main relay and ECU wire endpoints you have tested.
04-20-2011, 08:58 AM
#35
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
If this test^ was done correctly, then you have found the problem -- there is an open in the Yel/Blk wire that runs from terminal 6 of the main relay plug to ECU A11 and A24 of the ECU plug.
Start by verifying your finding by testing for the lack of end-to-end continuity between main relay terminal 6 and ECU plug A11 and A24 (individually). Also test for continuity between A11 and A24. If there is no continuity, the broken wire can be pinpointed by doing additional end-to-end continuity tests at two connectors (C101 and C130) that are located in between the main relay and ECU wire endpoints you have tested.
Start by verifying your finding by testing for the lack of end-to-end continuity between main relay terminal 6 and ECU plug A11 and A24 (individually). Also test for continuity between A11 and A24. If there is no continuity, the broken wire can be pinpointed by doing additional end-to-end continuity tests at two connectors (C101 and C130) that are located in between the main relay and ECU wire endpoints you have tested.
Man you have been such a great help.. Now what do I do? So we have determined that A11 and A24 are not working, so what do I do? I see the two wires go up into the fire wall and disapear.. Where the hell do the go? do they change there wire colors? Where do they end up, there is 2 of them and only one goes to the main relay?
04-20-2011, 09:27 AM
#36
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Locate the C101 connector (see diagram), which couples with connector C303. On the C303 side, the Yel/Blk wire runs to the main relay. On the C101 side, the Yel/Blk wire runs to connector C130 then to A11/A24. Check the Yel/Blk wire for continuity between main relay terminal 6 and C303. Next check the Yel/Blk wire for continuity between C101 and A11/A24. Post the results.
The Yel/Blk wire never changes color and branches at junction connector C130 prior to reaching A11/A24 (see circuit diagram I posted).
The Yel/Blk wire never changes color and branches at junction connector C130 prior to reaching A11/A24 (see circuit diagram I posted).
04-20-2011, 10:04 AM
#37
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Locate the C101 connector (see diagram), which couples with connector C303. On the C303 side, the Yel/Blk wire runs to the main relay. On the C101 side, the Yel/Blk wire runs to connector C130 then to A11/A24. Check the Yel/Blk wire for continuity between main relay terminal 6 and C303. Next check the Yel/Blk wire for continuity between C101 and A11/A24. Post the results.
The Yel/Blk wire never changes color and branches at junction connector C130 prior to reaching A11/A24 (see circuit diagram I posted).
The Yel/Blk wire never changes color and branches at junction connector C130 prior to reaching A11/A24 (see circuit diagram I posted).
also C130.. Cant find it.
04-20-2011, 10:24 AM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Locate the C101 connector (see diagram), which couples with connector C303. On the C303 side, the Yel/Blk wire runs to the main relay. On the C101 side, the Yel/Blk wire runs to connector C130 then to A11/A24. Check the Yel/Blk wire for continuity between main relay terminal 6 and C303. Next check the Yel/Blk wire for continuity between C101 and A11/A24. Post the results.
The Yel/Blk wire never changes color and branches at junction connector C130 prior to reaching A11/A24 (see circuit diagram I posted).
The Yel/Blk wire never changes color and branches at junction connector C130 prior to reaching A11/A24 (see circuit diagram I posted).
04-20-2011, 10:26 AM
#40
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
You are getting close to pinpointing the wire break. Now test continuity between C303 terminal 5 and main relay connector terminal 6.
04-20-2011, 10:30 AM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Ok also just checked continuity between FEMAle end of C101/C303 to Main relay .. It passed. I have continuity.
04-20-2011, 11:04 AM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Damn this car!!!! I thought it wierd that im getting continuity threw both sides of the C101/C303 connection and while i waited for your response I hooked everything back up.. Guess what............ It strated... I heard the fuel pump prime and relay click.. I should be happy with that but im not cuz it leaves me back to square one.. I changed nothing.
04-20-2011, 12:15 PM
#43
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Damn this car!!!! I thought it wierd that im getting continuity threw both sides of the C101/C303 connection and while i waited for your response I hooked everything back up.. Guess what............ It strated... I heard the fuel pump prime and relay click.. I should be happy with that but im not cuz it leaves me back to square one.. I changed nothing.
Last edited by Former User; 04-20-2011 at 12:46 PM.
04-20-2011, 01:36 PM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Ron you have been a true Tech for me and I thank you for that. Ive never come across someone so willing to help as you did. I will take your advise if this problem comes up again. Hope not but .. well you know how these intermittent problems are.
Thanks again.
Thanks again.
04-20-2011, 01:39 PM
#45
Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
08-02-2011, 09:55 PM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Re-Soldering the Main Relay fixed a similar problem on my son's 1992 Honda Civic DX. The common thread to the times it would not start was that the interior was hot (car in sun, in Summer). This began late last Summer, we replaced the fuel pump, and it seemed fixed. Then this summer it sometimes wouldn't start in the afternoons, worked fine by night and in the morning. Sometimes, opening the door for a while got it working again.
10-12-2012, 03:38 PM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Hey, I have exactly the same problem but my civic is a EG 93 with B16A2 originaly. Starts sometimes and sometimes not. I have tested the fuel pump the main relay and the distributor and everything works when I bypass. And when it runs, it could stop anythime. When it doesn't start, I have no spark and the pump is not priming. Anyone can help me? Im crazy with this problem. Thanks.
10-14-2012, 07:18 AM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
Ok guys, I tested the 101 connector and that was it! I just unplug and plug it back and the pump primed like never! Thanks RonJ !!!
01-03-2013, 12:33 PM
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Re: ?? 97 Civic - ODD NO START SOMETIMES - no spark or fuel??
It was a false alarm...the problem come back and I don't know how ti solve it. Now, the problem is not intermitent and the pump and spark signal don't appear anymore. Can anyone help me please?
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