2.0 relay board connector t4b, where do these wires go? |
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2.0 relay board connector t4b, where do these wires go? |
championgt1 |
Jul 27 2009, 12:07 PM
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#1
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
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underthetire |
Jul 27 2009, 12:09 PM
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#2
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Goes to the ECU. ECU runs it with key on only for a second or two. Doesn't run the pump again until cranking/running.
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championgt1 |
Jul 27 2009, 12:17 PM
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#3
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
So it is safe to assume that there is a problem with that wire somewhere between the board and the ECU? Or is the ECU a possible problem?
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ahdoman |
Jul 27 2009, 12:23 PM
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#4
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It's phonetic...Ah-D-O-Man (Audioman) Group: Members Posts: 667 Joined: 7-November 05 From: Santa Clarita, Ca. Member No.: 5,084 Region Association: Southern California |
Check your fuses on the board as well. One of them is for the fuel pump and can become corroded.
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underthetire |
Jul 27 2009, 12:24 PM
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#5
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
I don't have the pin out for the ECU connector here. Could be either. You can remove the connector on the ECU and ground it there to test it. Could be a bad driver in the ECU. Could even be a connector problem on the ECU, or a bad trace or solder joint. I never opened my ECU, I got rid of it.
FYI just make sure your not chasing something that is not really the problem. I think the pump only runs for 1 second when you turn the key on. Kinda hard to tell. |
underthetire |
Jul 27 2009, 12:26 PM
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#6
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
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championgt1 |
Jul 27 2009, 12:38 PM
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#7
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
I just pulled the ECU out and traced the wire from the connector on the relay board to the ECU. With my tester is shows continuity and with the key on shows 12 volts. It seems like that is correct.However I have the fuel line from the pump going to a glass bottle and it is getting no fuel in the bottle unless I jump the pin to ground. (IMG:style_emoticons/default/confused24.gif)
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underthetire |
Jul 27 2009, 12:43 PM
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#8
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Sounds correct. You are seeing the 12 through the coil of the relay. My guess is you have a bad ECU. Can't hurt to open it and see if anything is visibly wrong. Or see if anyone close to you has a ECU you could try.
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championgt1 |
Jul 27 2009, 12:46 PM
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#9
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
underthetire thanks for all your help and quick responses. There is a member local to me with a rebuilt ECU sitting in his garage. I will swap them out and see what happens.
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underthetire |
Jul 27 2009, 12:55 PM
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#10
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
No problem. I actually have to go work now anyway. Good luck.
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JeffBowlsby |
Jul 27 2009, 02:16 PM
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#11
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914 Wiring Harnesses Group: Members Posts: 8,510 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
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sixnotfour |
Jul 27 2009, 02:22 PM
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#12
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914 Wizard Group: Members Posts: 10,432 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains |
RicD just had the same problem switched out the ECU, works now.
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championgt1 |
Jul 27 2009, 11:18 PM
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#13
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
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underthetire |
Jul 27 2009, 11:35 PM
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#14
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Well? |
SirAndy |
Jul 27 2009, 11:58 PM
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#15
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
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championgt1 |
Jul 28 2009, 10:22 AM
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#16
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
FYI just make sure your not chasing something that is not really the problem. I think the pump only runs for 1 second when you turn the key on. Kinda hard to tell. [/quote] This was the problem all along. A member brought over a remanufactured ECU and we plugged it in. He could here the relay click and the pump run. Ok, ECU is bad. Just to be sure we plugged my ECU back in and again he could here the relay click and the pump run. The problem all along was that by myself in the car I could not here the pump run and thought there was an actual problem, when there was not. (IMG:style_emoticons/default/slap.gif) |
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