| Author |
Message |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 300
Reg: 07-2005
|
Please see the attached pic.
It shows the RPM2 pin.
But according to here ( http://www.trackdaymedia.com/~manny/Tech%20&%20Diag/1JZGTE__JZZ30__pinouts.pdf ) , its actually IGt1 - Ignitor. So which is it?
I have a EMS piggy back system installed and the wire for RPM2 has been cut and is connected directly to the EMS.
The engine is working fine like this, though my tacho is no longer working and im trying to work out if i should try and connect RPM2 wire with the standard ECU and T-line it with the EMS wire?
Would that get the tacho working? Any ideas which wire talks to the tacho?
RPM1 is still connected fine.
Thanks
Ben |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1736
Reg: 07-2005
|
http://soarercentral.com/sc-forum/messages/3442/45957.html?1139956432
what does the EMS do? |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 302
Reg: 07-2005
|
controlls air/fuel mixtures and monitors water temp etc... |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1751
Reg: 07-2005
|
If it is connected BEFORE the ECU then RPM2 needs to be connected to ECU i.e. it should be tapped into not cut unless the EMS is trying to modify that signal and has an output that goes to ECU. |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 305
Reg: 07-2005
|
I thought that. I cant seem to find any wire that actually goes back in the the ECU, so i assume its taking over the role that pin-out was meant for.
The wire from under the dash goes directly to the EMS. The EMS plug's wire is just cut connected to nothing. This is why i think it may cause the Tacho to not work. If i reconnect it, do i run the risk of blowing up my ECU's? |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 306
Reg: 07-2005
|
From memory, the Ignition 1 wire from the EMS connects to what used to be the RPM2 wire.
Download this small help file and see the ECU pinouts for pinout 14 (pink wire).
http://www.enginemanagement.com.au/downloads/StingerV2.hlp
Really makes no sense to me 
I just re-wired it all connecting it up with what was there before (the mechanics job was dodgy as hell! twisting wires together, no solder and in some cases not even tape! haha) |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1754
Reg: 07-2005
|
Not enough info there. I can't see a rev input to the EMS??? so don't know why that wire is cut.
What model do you have? with or without built in igniters?
Either way the factory ECU still needs the rpm for the tacho. No damage should occur if it is reconnected. |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 307
Reg: 07-2005
|
me either
its a 4224 version 2.2. it doesnt have built in ignitors.
Cool, i'll T-line it tonight and see what happens. Does RPM2 or RPM1 control the Tacho? |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 308
Reg: 07-2005
|
with all that in mind, any idea why im also receiving a Alternator not charging battery warning?
I also noticed that the O2 sensor is hanging in the engine bay... i assume the EMS doesnt need it.. ? ... |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1755
Reg: 07-2005
|
Not sure which signal the tacho uses, possibly both. The charge indicator could possibly use an 'engine running/not running' signal which would be derived from rpm signals too.
EMS DOES need an oxygen sensor, maybe they fitted another one?
It does not need the RPM signal but should use a crank angle sensor signal, possibl;y they have used RPM instead???
This is a stand-alone system but the factory ECU should still be connected to provide all the other functions. It will not be happy without rpm signals. |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 309
Reg: 07-2005
|
ok, i might have a look arounf for another O2 sensor, but im pretty sure its just hanging in the bay. RPM1 is connected fine. I'll connect RPM2 back up and keep it connected to the EMS as well. fingers crossed. I might get a EMS specialist to have a look in the end. Anyone know one in brissy cheap?
Thanks for your help Mark 
Ben |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1757
Reg: 07-2005
|
The wiring diagram shows a 4 wire O2 sensor, maybe it is supplied with the EMS? |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 311
Reg: 07-2005
|
yeha had a good look on the exhaust and nothing there at all. wonder its some how bypassing the O2 sensor... |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1766
Reg: 07-2005
|
Is the sensor connected to the ECU?
If not the ECU is probably in some default mode. If it is connected it won't be telling the ECU much about fuel mixtures  |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 315
Reg: 07-2005
|
ok got some news. Called Quickmaz, a EMS specialist and chris said that it doesnt need a O2 sensor, phew! Also said not to connect the RPM2 signal back to the ECU. He said i need to find which wire comes from the stock tacho to the ECU and connect that up with the EMS tacho output wire (EMS pinout 4). He said that if i reconnect the RPM2(ignitor) wire with the stock ECU as well as the EMS, the stock ECU will get confused and try to provide readings to the EMS, which inturn wont work properly.
So, the big question is, which wire is the one that goes to the Tacho? I'll be pulling my dash apart today to find out. Wish me luck!
Ben
PS- Thanks Mark |
Don Bagnall
Moderator
New Zealand
I have LESS Soarers than Hayden :-(
Posts: 2531
Reg: 05-2005
|
GOOD LUCK!  |
Mark Paddick
Goo Roo
ACT
Soarer UZZ31
Posts: 1788
Reg: 07-2005
|
I would have thought hat connecting the tacho out of the EMS to rpm2 in of the ECU would do.
Both wiring diagrams for that model EMS clearly show a 4 wire Oxygen sensor
Me not know anymore  |
Ben Evans
TryHard
Qld
"Master Power" Turbo 1J With Xtras
Posts: 319
Reg: 07-2005
|
thats a brilliant idea! i'll try that on saturday |
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