aquascrotum Posted October 27, 2012 Share Posted October 27, 2012 We're running a stock 4EFE with standard ECU, I bought another 4EFE ECU to carry out the rev limiting mod described hereWhen I tried to test the ECU I bought before making the mod (by plugging it into the car), I get an intermittent flash of the engine warning light on the dash and the car refuses to start.Have tried disconnecting the battery before hooking up the new ECU but that doesnt affect anything.The new unit is visually identical to the original, but some of the long model numbers are subtley different - the new ECU is definitely marked as a 4EFE though.Am I missing some procedure to get the car to allow the new ECU or do I have a more fundamental fault? Quote Link to post Share on other sites
Rob H@RCH Engineering Posted October 27, 2012 Share Posted October 27, 2012 If the numbers are wrong its probably the wrong ECU for the car the early 4efe engines had a different ignition set up to the later ones. Quote Link to post Share on other sites
morgey Posted October 28, 2012 Share Posted October 28, 2012 I think if you bridge the dianostics port in the engine bay you can find out what code the ecu is flashing up.Might help to finding the issue ;) Quote Link to post Share on other sites
ryan lang Posted October 28, 2012 Share Posted October 28, 2012 also, you may have bought the corolla 4efe ecu. they are exactly the same visually, but different internally Quote Link to post Share on other sites
aquascrotum Posted October 28, 2012 Author Share Posted October 28, 2012 I think if you bridge the dianostics port in the engine bay you can find out what code the ecu is flashing up.Might help to finding the issue ;)As in there may be a legacy error from the previous car it was installed in? How do you clear fault codes if thats the case? Quote Link to post Share on other sites
aquascrotum Posted October 30, 2012 Author Share Posted October 30, 2012 Still at this...is the ECU tied to the immobiliser? As in do I need the transponder from the original key that matched the car the ECU came from? Quote Link to post Share on other sites
morgey Posted October 30, 2012 Share Posted October 30, 2012 you shouldnt do, I've got a completely different engined ecu in my car and it never had a problem unless i didnt have a key with the original chip in it that came with the car.might be a silly question, not sure if it would even fit, but the ecu you brought isnt for an auto is it? Quote Link to post Share on other sites
5T4R7ET N/A Posted October 31, 2012 Share Posted October 31, 2012 When i went to toyota to get a key made,they said that the transponder has to be programmed to work with the ECU, cost something like £65 to get it done. Quote Link to post Share on other sites
KPJUK Posted June 19, 2015 Share Posted June 19, 2015 I can say from this weeks experience, that if you have a 3rd generation 4E-FE from a Corolla G6 the ECU has a built in immobiliser that can not be bypassed. If you want this engine and ECU you will need the ECU, Immobiliser Computer and Key Transponder all from the same vehicle. The wiring to the door unlock switch and courtesy light switch are not needed. Sorry to dig up an old thread but it may help a future viewer researching the issue. KP Quote Link to post Share on other sites
Johnboy GT Posted June 19, 2015 Share Posted June 19, 2015 No need to apologise bud. It's exactly what people look for when searching the forum, clarification John Quote Link to post Share on other sites
JLF88 Posted June 25, 2015 Share Posted June 25, 2015 Does this also count for putting a jdm ep91 Ecu in a UK? Quote Link to post Share on other sites
morgey Posted June 25, 2015 Share Posted June 25, 2015 No jdm ecus dont have emobilisers in them. Thats why my previous engine swaps work that i mentioned above lol, I've learnt a lot since then Quote Link to post Share on other sites
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