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I still think this project car's possessed-the latest dilemma 200

posted by volvo245kit on Wed Apr 8 07:21 CST 2009
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last visit: Sat Apr 30 20:54 CST 2011

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Okay, here's the deal. I went ahead and checked and recleaned all of the grounds like sdewolfe had suggested. I've already checked and rechecked the

distributor setting @ TDC on the #1 cylinder and verified spark. All's good there. I also downloaded that greenbook that you suggested as well. It had all

of these steps of things to check but didn't have what to do if it didn't check out so I went back to the Bentley. First, from the greenbook I found that

I don't have voltage at terminal #18 in the ECU harness connector. The Bentley
says to refer to the wiring diagram and repair the wiring fault. This is where

I'm weak. First, let me say that since this is a project car with an upgraded engine wiring harness I'm using the 1984 model wiring diagram from the Bentley.

I did find the ECU and terminal #18. I went ahead and reconnected the connector to the ECU and performed the system and fuel pump relay tests from

the Bentley starting on page 241-11 for the LH2.0 system. Here's where it gets weird. I did step #1 for both relays (they're identical for the LH2.0) and they

both had voltage at terminal 87. It says that if there's not voltage, go to step #2. I went ahead and checked step #2 anyway and the system relay was good

but the pump relay didn't have voltage at terminal #86 with the ignition off. It said once again to fix the wiring fault. So I went to the wiring diagram and

found that the wire from the fuel pump relay terminal #86 goes directly to the terminal #18 on the ECU plug. Also it's fed voltage from the #13 fuse in the

fusebox which is supposed to have voltage with the ignition off. I went to the fusebox and checked for voltage and there isn't voltage with the ignition off

but there is with it on. Still no-start. I've looked at this thing and I don't know what to do next. Any ideas? Thanks, Charles

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I still think this project car's possessed-the latest dilemma 200

posted by Art Benstein on Wed Apr 8 07:32 CST 2009
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last visit: Fri Oct 17 20:10 CST 2014

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Okay, here's the deal. I went ahead and checked and recleaned all of the grounds like sdewolfe had suggested. I've already checked and rechecked the distributor setting @ TDC on the #1 cylinder and verified spark. All's good there. I also downloaded that greenbook that you suggested as well. It had all of these steps of things to check but didn't have what to do if it didn't check out so I went back to the Bentley.

First, from the greenbook I found that I don't have voltage at terminal #18 in the ECU harness connector. The Bentley says to refer to the wiring diagram and repair the wiring fault. This is where I'm weak. First, let me say that since this is a project car with an upgraded engine wiring harness I'm using the 1984 model wiring diagram from the Bentley.

I did find the ECU and terminal #18. I went ahead and reconnected the connector to the ECU and performed the system and fuel pump relay tests from the Bentley starting on page 241-11 for the LH2.0 system. Here's where it gets weird. I did step #1 for both relays (they're identical for the LH2.0) and they both had voltage at terminal 87. It says that if there's not voltage, go to step #2. I went ahead and checked step #2 anyway and the system relay was good but the pump relay didn't have voltage at terminal #86 with the ignition off.

It said once again to fix the wiring fault. So I went to the wiring diagram and found that the wire from the fuel pump relay terminal #86 goes directly to the terminal #18 on the ECU plug. Also it's fed voltage from the #13 fuse in the fusebox which is supposed to have voltage with the ignition off. I went to the fusebox and checked for voltage and there isn't voltage with the ignition off but there is with it on. Still no-start. I've looked at this thing and I don't know what to do next. Any ideas? Thanks, Charles
--
Art Benstein near Baltimore

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I still think this project car's possessed-the latest dilemma 200

posted by Art Benstein on Wed Apr 8 10:39 CST 2009
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Sorry, Charles, I rearranged your line breaks so I could read the message, printed it out, and got stuck trying to read the older threads and reference material.

Help me. This is an 84? Was a diesel? Hasn't run yet as a gasser?

The Bentley is wrong in step 2. Before you go any further, get a red pen, your Bentley, and read this post: Bentley Errata Update

After dispensing with this red herring, can you tell us if you have checked for fuel pressure, spark, and compression?

--
Art Benstein near Baltimore

The world's youngest parents were 8 and 9 and lived in China in 1910.

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I still think this project car's possessed-the latest dilemma 200

posted by volvo245kit on Wed Apr 8 15:18 CST 2009
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Yes, First of all this car was an '82 245 diesel originally. Secondly it did run rough last fall and last week intermittently. If you check my other posts, you'll see all of the steps that I've done to get this car to run. I've used parts from an '84 and an '83. the reason that I've been refering to the wiring diagram for the '84 is because I installed a used upgraded wiring harness that I bought that was for an '83 or '84 wifth the B23 engine which is what I have. Okay, so according to your Bentley update there shouldn't be voltage present at terminal #86 in the pump relay with the ignition off which also means that the Volvo greenbook is wrong also. So this means that there's nothing wrong with my pump relay thus far. I did check compression last year and it was good.I checked for spark a few days ago and that's good also. Now, while I haven't checked for fuel pressure because I don't have the right Volvo tool to do this, I have replaced the in-tank transfer pump with the new IPD upgraded unit as well as the new Bosch main fuel pump, filter and fuel pressure regulator, So this means that all of the fuel delivery parts (except for the ECU and system and pump relays and lines) are new. Let me know what you think, I'm still lost. Thanks, Charles

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Errors in the factory manuals 200

posted by Art Benstein on Wed Apr 8 15:51 CST 2009
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I'm not sure where the green book is wrong. Can you point to chapter and verse? I have an early LH2.0 manual, TP30427/1. One little noticed difference between 83 and 84 is that very wire you mention, feeding 86 of the fuel relay. In the 83 that is sourced by fuse 12. In 84, by fuse 13.

--
Art Benstein near Baltimore

"24 hours in a day, 24 beers in a case. Coincidence? I think not." - Stephen Wright

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Errors in the factory manuals 200

posted by volvo245kit on Thu Apr 9 07:43 CST 2009
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I looked at the green book again and dfound that I'd made a mistake. It was right. I mis-read the step about turning the ignition off when checking for voltage at terminal #18 in the green book I thought it said to turn it off when in fact it said to turn it on for this check. So it was correct and I was mistaken. My apologies. I did however continue with the checks in the green book and everything is checking out good except for one thing. I got to the step where you ground terminal #21 at the ECU plug and you check for voltage at the air mass meter terminals #9 and #36 on the airmass meter connector. I've got 12V at terminal #9 but I can't get any voltage at terminal #36. I've got a spare AMM so i gues I'll try swapping that out and see if that changes things. Also I've printed out a copy of the Bentley erratica stuff to have with my Bentley. On behalf of I'm sure everyone here on the BB who does their own maintenance I'd like to say thanks for all of your work clarifying all of that information as I'm sure it was no small task. Thanks again and I'll keep you all posted, Charles

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