alternator connector issue's


Matt tynan

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Honda civic ek, toyota starlet gt turbo, corolla e12
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Hello lads, ive been following this forum for a good while now and decided to sing up, im in a bit of bother with my alternator on my b18c, basically i have a b18c from a 98 spec dc2 which as far as i know is obd2a, correct ne if im wrong, i also have an engine loom from a ek4 vti pre facelift, which should also be obd2a, but the connector for the alternator is only a 3 pin, whereas the the alternator itself is 4 pin, does anyone know an alternator that will bolt straight up to my b18 and os also 3 pin, thanks in advance
 


B16Metro

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Apr 5, 2012
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All UK cars have a the 3 pin connector (obd2 cars) obd1 is a round plug so won't fit. It looks like you have a US alternator.

Best bet is a mb6 alternator or go on Facebook I'm sure someone will sell you a b series alternator with right plug cheap.
 


Matt tynan

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Honda civic ek, toyota starlet gt turbo, corolla e12
I actually figured it out mate, turns out even though both looms are obd2a the ek4 vti alternator is only a 3 pin, whereas the dc2 r has a 4 pin like the ek9, all thats needed is a vti alternator, my b18c is type r, definitely not US, thanks anyway for the reply mate appreciate it

Edit: still haven't solved the problem, i could get a vti alternator but would have error code 20 as i have a p73 jdm ecu which supports ELD (electrical load detection)
 

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B16Metro

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Search Google "b series alternator plug" you'll find the square 4 pin plug is American. I have both a facelift ek9 loom on my ek and a pre facelift sitting in the shed, both have 3 pin plug.
 


Matt tynan

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I have a jdm dc2 b18c, and the teg loom also is 4 pin, dont know much about mb6 to be honest, different specs for different countries i suppose really
 


Kipper

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That's a 96 spec JDM DC2 Alternator with square plug (Denso), You need one from a B18C6 UKDM DC2 (Mitsubishi) to be 100%, Others will fit but this solved my problem recently.
 



Matt tynan

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Honda civic ek, toyota starlet gt turbo, corolla e12
Did you solve your problem?
I have pal, i just sourced myself the 4 pin connector and soldered it on, i just blanked off the eld wire and have no issues with charging
 


harvey j

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I have pal, i just sourced myself the 4 pin connector and soldered it on, i just blanked off the eld wire and have no issues with charging
Ah cool man, I had the same problem with mine, i had to change the alternator and loom as the eld in the jdm cars is in the fuse box and UK and USDM cars have them in the alternator and my USDM p28 didn't speak to the eld, I only noticed this problem when it was raining and I had my wipers, heaters and headlights on the voltage had dropped to 9 volts.

Have you checked your voltage when the cars running with the wipers etc running?
 


Matt tynan

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Honda civic ek, toyota starlet gt turbo, corolla e12
Ah cool man, I had the same problem with mine, i had to change the alternator and loom as the eld in the jdm cars is in the fuse box and UK and USDM cars have them in the alternator and my USDM p28 didn't speak to the eld, I only noticed this problem when it was raining and I had my wipers, heaters and headlights on the voltage had dropped to 9 volts.

Have you checked your voltage when the cars running with the wipers etc running?
I have a volt gauge in my own and it always reads 14 volts when running and never drops, my engine light comes on alright every now and than but a quick erase of the code and it doesn't come on for about a week or so, all i need is a jap fuse box with the eld and that shoukd sort out the light, im using the standard p73 ecu from a dc2, so you have a jdm loom and alternator on the car now?
 


harvey j

PSN: DIRTY-JDM-B20
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No I have a alternator from a vti and loom from a vti and a USDM p28 with s300

I did have a turbo b20 in my ek9 but I noticed the loom had been spliced previously so I used the ek9 loom and alternator and threw the old loom away, that was in the summer so I had no need for lights, wipers and blowers. But I did notice that when the indicators was on it would drop a couple of volts with each flash and I could hear the fuel pump changing sounds with the flash, then in the winter months I noticed it dropping to 9v and my pump was struggling so I did some research and found out the differences with the eld's, so I got a UK alternator and UK loom and it solved the problem
 


Matt tynan

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Honda civic ek, toyota starlet gt turbo, corolla e12
Glad you got it sorted, no bigger headache than wiring issues :angry2:
 


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