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Location:
NSW
Registered:
August 2003
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Location:
sydney
Registered:
March 2003
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Re: MR2 Gen3 conversion, error code 14
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Sat, 03 December 2005 23:18
 
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what loom did u run
the original one or the one that matches the new engine
does the loom match the ecu or did u mix and match
i have had this prob before on a gze
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Location:
NSW
Registered:
August 2003
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Re: MR2 Gen3 conversion, error code 14
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Sat, 03 December 2005 23:57
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There are 2 looms:
1. One that connects to the engine(injectors etc) and the 2 plugs to the ECU.
2. One that goes to the left hand side kick panel in the cabin and 1 plug to the ECU.
I used the engine loom that came with the Gen3, and the loom already in my car that goes to the kick panel(as the one that came with my engine was cut).
Therefore i have mixed and matched.
I know my previous engine was running without a fuel pump relay(must have been wired to 12v or something), whereas the Gen3 had the wiring for the fuel pump relay.
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Location:
sydney
Registered:
March 2003
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Re: MR2 Gen3 conversion, error code 14
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Sun, 04 December 2005 00:55
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the fuel pump trigger is different on alot of 3sg engines
i think theres like 4 diff spots it can be depending if its
a st185 st205 non turbo turbo etc
but code 14 is something to do with ignitor
i did an mr2 yesterday
theyre easy to do but there are some tricks to getting the
a/c idle up working
if it has electronic power steering u need to do somehting
if it has abs and traction control u need to do something
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Location:
NSW
Registered:
August 2003
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Location:
Sydney
Registered:
October 2003
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Re: MR2 Gen3 conversion, error code 14
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Sun, 04 December 2005 19:49
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The way you wired it up, if you used all the electronics from the gen3, you should be OK. You did use the coil/ignitor/ECU off of the gen3?
As you can in the image below, the 'A' connector (the one on the right), which is your body loom, hasn't changed at all. So as long as you have the gen3 computer, the two plugs from the engine loom should be right at home.
edit: I meant right, but typed left
[Updated on: Sun, 04 December 2005 22:26]
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Location:
NSW
Registered:
August 2003
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Re: MR2 Gen3 conversion, error code 14
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Tue, 06 December 2005 10:42
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Well i worked out that there was an IGF signal, so that would mean the error code was wrong. From there i started matcing back each individual wire in the fuse box in the engine compartment, as these are the only ones that would have changed.
Thought i'd start with the smallest connector first (known as EB1 and has 8 poosible wire positions, see BGB)
I noticed that in my Gen2 a Blue female wire connected to a blue/black male wire in position 8. But now i had a blue female wire in postion 6 connecting to nothing, and the same blue/black male wire in position 8(as this harness wasn't changed).
As i knew the blue/black wires had something to do with the fuel pump relay, i moved the male blue/black wire to position 6 and started the car.
Hey presto!!! Car idled fine, checked for error codes and had none. Not sure what the wire was exactly for, but it works fine now.
Hope i haven't confused anyone, and this information is helpful.
davedave,
Thanks for the pin Harness, i WAS looking for the Gen comparisons, and this is a great reference.
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Location:
Newcastle
Registered:
April 2004
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Re: MR2 Gen3 conversion, error code 14
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Sun, 11 December 2005 02:47
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I've had similar problems with toyotas before, most often it was because the old motor had an air flow metre with the wiring for the fuel pump/circuit opening relay running through a set of contacts in the AFM.
I think your gen 3 is map sensed and doesn't have these contacts.
The circuit opening relay has 2 coils one for when the car is running (through AFM or from gen3 ecu) and another from the starter circuit to turn on the fuel pump on while starting.
So your fuel pump would only run while you were cranking the engine.
Something to keep in mind for anyone installing an aftermarket ecu as well.
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