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LINK G4 pnp for USDM Ej205 WRX

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Hello all-

 

I bought secondhand a Link Subaru PNP consisting of a G4 Storm top board. 

This was sold as PNP for the USDM EJ205 Subaru, but none of the trigger setup schemes match this engine. There are many Subaru schemes, including 6 cyl, v. 1-6, v. 7-9, and USDM EJ25 AVCS, but nothing specific for the USDM Ej205

I'm curious if any of you are running this app, and if so did you use a custom setup for triggering? 

Currently, the crank sync is producing errors, as well as a very inconsistent rpm signal, consisting of low reading and huge spikes. 

 

thanks in advance for the help!

 

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Hi,

I believe that your engine is most likely to work with Subaru V7-10(JDM) trigger mode. This trigger mode should have two pulses for the Trigger 2 cam sensor. If you have access to an oscilloscope and can upload a photo of the cam and crank triggers we can confirm the correct trigger mode to use.

Scott.

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i'm still working on acquiring a scope.

In the meantime, here is a log of the vehicle cranking. VERY erratic RPM signal.

That got me digging around and I found this (attached) from the Link manual. The jumpers on the board do not look correct, or am I not corresponding them right to the diagram? 

thank you!

Log 4-10-16 9;41;11 pmcrank.llg

14600968_1072636932832877_1425604225850549672_n.jpg

14495492_1072636949499542_5896052704315648735_n.jpg

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The photo you put up of the actual ECU board show that it is one of out WRX V7-9 ECUs, so you should select the Subaru V7-10(JDM) trigger mode. 

The log file shows that the Trig 1 and Trig 2 signals are only being received intermittently. This may mean that the Trigger arming threshold table for the 0 and 1000 rpm cells need adjusting. I would try reducing them and see if that helps. When you have access to an oscilloscope you will be able to work out what the cells in both tables should be set to.

Arming_threshold.thumb.png.aa6425b69a7f9

Scott

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Thanks Scott.

I'm stillconcerned about the jumper config, however. When the key is set to on, the tach does a full sweep, as it does on The STi - this is not a feature on the USDM wrx, and concerns me that this is part of the rpm issue.

I changed the jumpers to the 'wrx' position, and the ecu won't connect. Switch the jumpers back and it connects flawlessly.

Confused! I will play with arming until the scope shows. Up. 

Appreciate the help!

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If it doesn't power up when you swap jumpers around then it suggests your jumpers were correct in the first place.  The tacho "key on sweep" is a ecu function that can be turned on or off in the software (and is normally enabled in the Link base maps) so this is nothing to do with your problem.

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Woah, breaking out the retro kit there lol.  That's lots of knobs & buttons to figure out...

Just a note - for low speed automotive signals you don't need anything special for probes, just the cheapest you can find will be fine. 

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Woah, breaking out the retro kit there lol.  That's lots of knobs & buttons to figure out...

Just a note - for low speed automotive signals you don't need anything special for probes, just the cheapest you can find will be fine. 

Haha yep - leftovers from the Russian space program it appears :)

 

As I'm digging through this a bit more - Is there a reason that in the Link pinout for v 7-9 cars that the ground and the +14v main power relay are run through E-4 and E-5? these are RH TGV pins.

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As I'm digging through this a bit more - Is there a reason that in the Link pinout for v 7-9 cars that the ground and the +14v main power relay are run through E-4 and E-5? these are RH TGV pins.

On our ECU pin E5 is permanently connected to Pin E1 (which is power ground in), and pin E4 is permanently connected to pin D2 and D3 which is ignition switched +12V.

Scott

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