Harllequin Posted March 5, 2008 Share Posted March 5, 2008 Hay there guys any advice greatly apreciated as I'm completely stuck now. Car is Jap spec TT Car already had second decat and cat back exhaust. Added FCC, Iridium Plugs, new plastic bits on the coilpack connectors, First Decat, Walbro Fuel pump. I changed the output voltage on the FCC to 4.3 volt as per the guids on MKiv.com Since adding there is wont tick over very well at all and wont run drive at all. Engine light is on so I've tested the error code and it shows Error 31 - Air Flow Meter Circuit. I didnt think Jap spec cars had air flow meters. So basically what have I broke on it Please help Darren Link to comment Share on other sites More sharing options...
Ian C Posted March 6, 2008 Share Posted March 6, 2008 US Spec ones do, though, and their instructions give you the MAF wire to intercept - which airflow signal wire did you use? -Ian Link to comment Share on other sites More sharing options...
Harllequin Posted March 6, 2008 Author Share Posted March 6, 2008 Hay there Ian. thanks you kindly for the reply. I was starting to panic LOL I've wired to the following pin outs. Red wire Pin 31 Black wire Pin 69 Green wire Pin 62 White wire the other end of the wire from pin 62. Full info on what i did here http://www.mkivsupra.net/vbb/showthread.php?t=141607 Link to comment Share on other sites More sharing options...
Ian C Posted March 6, 2008 Share Posted March 6, 2008 Ah of course it's an FCD so it'll be on pin 62 on JDM and UK/US spec anyway, I was thinking of airflow signal fuelling piggybacks. Well, can you get it idling and multimeter the voltage coming off the white wire? I can tell you right away if that's the right value or not. Also, try reconnecting the MAP sensor wire, bypassing the greddy unit, and see if it clears up - you only have to twist the ends together as a quick test. -Ian Link to comment Share on other sites More sharing options...
Harllequin Posted March 6, 2008 Author Share Posted March 6, 2008 I'll do that once I get home tonight Ian. I pre empted problems by connecting the green and white wire with bullet connectors, so I'll just be able to unplug then replug and go. Is it just the voltage from the white wire end you need or what the greddy unit is putting into the ECU? Link to comment Share on other sites More sharing options...
Harllequin Posted March 6, 2008 Author Share Posted March 6, 2008 just had another thought. If the connectors on the coil packs were not at optimum fit. Would that show in an error code? I'm wondering if after fitting the new plastic bits they are not seating correct on the coil packs. Link to comment Share on other sites More sharing options...
Harllequin Posted March 6, 2008 Author Share Posted March 6, 2008 Ok I nominate ME for the numpty award When I put the plastic cover back over the ECU it looks like I severed the earth cable to the BCC. I've just earthed this to the body and it all works perfect again. Should I re do the earth to the wire it says on the ECU or will it being earther to the body be enough? Thanks for all the help though. It was much apreciated and I'd likely not have found the cut wire if you hadnt wated to know the voltage Ian Again thanks. Link to comment Share on other sites More sharing options...
mr keef Posted March 6, 2008 Share Posted March 6, 2008 i was looking at this but i dont get the white wire?if you spliced into 62 for the green?and then the other end for the white?....ok im confused!...i have a greddy one to fit but this confuses me Link to comment Share on other sites More sharing options...
Harllequin Posted March 6, 2008 Author Share Posted March 6, 2008 Cut the wire on pin 62. Green whire goes to the ecu. White wire attaches to the wire from the sensor, thus completing the circuit. Link to comment Share on other sites More sharing options...
mr keef Posted March 6, 2008 Share Posted March 6, 2008 Cut the wire on pin 62. Green whire goes to the ecu. White wire attaches to the wire from the sensor, thus completing the circuit. ahhh i see cheers mate:) Link to comment Share on other sites More sharing options...
Gaz Walker Posted March 7, 2008 Share Posted March 7, 2008 Glad you got sorted Darren Link to comment Share on other sites More sharing options...
hodge Posted March 7, 2008 Share Posted March 7, 2008 Hay Darren Ive had a code 31 error o my car for ages since I fitted a FCD (feature on my E01), Ive tried everything but cant seem to get rid of it. Did your fault code go when you sorted the earth and reset the ecu? Link to comment Share on other sites More sharing options...
Harllequin Posted March 7, 2008 Author Share Posted March 7, 2008 Went right away. No messing. Reset the ECU and not seen it since. Link to comment Share on other sites More sharing options...
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