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wesitarz
Samba Member
Joined: August 20, 2012
Posts: 1491
Location: Victoria,B.C.Canada
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 Posted: Tue Oct 20, 2015 3:15 pm Post subject: |
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| The ECU needs to have IGN+, B+ and cam/crank sensor signals. You can backprobe the ECU connectors for these.Check grounds as well. |
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dorje
Samba Member
Joined: June 02, 2014
Posts: 50
Location: Berkeley
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| Posted: Wed Oct 21, 2015 11:46 am Post subject: |
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Here's the latest from Dr. Shiels:
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The Harness will work for any 90 to 94 EJ222 engine but you will have to be sure you have the right combination of ECU, MAFM and IAC if you are using 90/91 components.
a) For M/T configuration you need a AA56x series ECU, Aluminium MAFM AA170, and AA032 IAC with ECU pin A20- left open circuit
b) For A/T configuration you need a AA38x series ECU, Black plastic MAFM AA160, and AA050 IAC with ECU pin A20- grounded
If the ECU is getting power and has the Ground connections - it should cycle the Fuel pump even if no other items are plugged in.
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I tested IGN+ and B+ with multimeter. B+ voltage does drop slightly when cranking, but in any case the ECU should be turning on the fuel pump when ignition is on. Planning to get a '91 ECU and go back to the original MAF & IAC.
What voltage should the cam/crank signals be? |
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wesitarz
Samba Member
Joined: August 20, 2012
Posts: 1491
Location: Victoria,B.C.Canada
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| Posted: Wed Oct 21, 2015 5:40 pm Post subject: |
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Are you seeing IGN+ and B+ power at the ECU with ignition ON? The cam and crank sensor signals are waveform. The can be tested at the ECU with a 12v test light that tests +/- (about $12 CAN) It will flash red/green at the ECU while cranking.
Edit: The sequence is (1) connect green test connectors (2) turn ign to ON (3) check for relays & FP clicking/priming (turning ign ON first doesn't work as I recollect) |
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dorje
Samba Member
Joined: June 02, 2014
Posts: 50
Location: Berkeley
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| Posted: Tue Oct 27, 2015 12:17 am Post subject: |
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Well, Tom said it was a ground. A psychic told me it was a ground. (Actually that was my wife.) The Subaru Vanagon forum said it sounds like a missing ground. But I just knew I'd tested every ground on that dang van for continuity with Battery -, unscrewed, scrubbed with the dremel, tested again.
Well, while putting in the old IACV, I dropped the 10mm socket into the engine. Crawled around looking for it, poked at the engine plugs... and lo and behold, there was a stumpy ring terminal lost amongst those big plugs, dangling there all lonely. I introduced it to my friendly neighborhood intake manifold ground wire screw. And........ it started!!! 
https://youtu.be/Am_zK2aMsbM
Had no idea whether it would actually run since this is the first engine I've ever rebuilt. What a relief!
Still need to run the VSS signal wire. I'm using GoWesty's that plugs into the speedometer. Probably would have been faster & easier to install the Hall effect sensor that goes under the wheel well, not such a long run for the wire. But the GoWesty design is pretty clean if you're comfortable splicing a couple of wires to get 12V.
Two trouble codes: 12 and 23. Odd, neither of those are VSS... So excited. |
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[email protected]
Samba Member
Joined: April 29, 2015
Posts: 704
Location: Berkeley Ca
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| Posted: Wed Oct 28, 2015 7:46 am Post subject: |
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| Congratulations! |
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