Evo ECU pin out information - Page 3

Wreckleford · 17-08-2007, 05:21

Quote:

Originally posted by grants
Evo 7 -Seven - VII

I want to suggest that there is a mistake in this diagram (and in the Mitsu service manual) with regards to pins 8 and 22. I' ve checked a stock 7 and found that pin 8 is the fuel pump and 22 the a/c compressor as per the 4-6. Can anyone confirm this?

cossie1 · 22-08-2007, 22:50

Ok just been looking at the e7 into an e6 option.

If the above is correct, then the only pins to worry about would be pins 20,21,22 which all control the fans and the aircon ? and pin 87 which is Idle Switch ??? on the e6 and is ACD signal in on the e7.

So what exactly would need to be done, and my reason for asking, is I have been offered a cheap evo 7 Ralliart Ecu.

Wreckleford · 23-08-2007, 14:34

Disconenct the idle switch wire.

Then swap wires 32 and 34 (A/C Lo and Hi fan). Disconnect 20 and 21 (rad Lo and Hi fan)and connect 20 to the wire that is now at 32 and connect 21 to the wire that is now at 34.

That's all that is needed.

Edit: you might want to double check that the A/C Hi and Lo are correct for both the 7 and 6 pinouts above. I need to do this myself on the car I converted.

**AndyF_RSX** · 23-08-2007, 14:37

Marcus, did you get my PM?

Cheers

Andy

Wreckleford · 23-08-2007, 14:38

Yes, can't send it to you now though as I am at work, and no electricity at home due to the hurricane.

cossie1 · 23-08-2007, 14:44

Quote:

Originally posted by Wreckleford
Disconenct the idle switch wire.

Then swap wires 32 and 34 (A/C Lo and Hi fan). Disconnect 20 and 21 (rad Lo and Hi fan)and connect 20 to the wire that is now at 32 and connect 21 to the wire that is now at 34.

That's all that is needed.

Edit: you might want to double check that the A/C Hi and Lo are correct for both the 7 and 6 pinouts above. I need to do this myself on the car I converted.

Is the A/C fan the same as the Rad fan on a 6 then ?

Also would doing that not cause a problem if the A/C was on when the engine gets hot, it's going to try and switch the fan on again, thus giving it twice as much current ???

Wreckleford · 23-08-2007, 15:43

It won't cause a problem. It is working the same as before, except that the a/c fan pins are being used to trigger the radiator fans as well as the a/c fans. The ECU only pulls the fan relays to ground, so it is not as if the total fan current is passing through the ECU.

cossie1 · 23-08-2007, 23:55

Nice 1, thanks for the info.

Will cutting pin 87 (Idle switch) have any effect on anything ?

What exactly does that do ?

Oh and am I correct in thinking the evo 7 RA ecu is better than the Evo 6 RA ecu ?

clivew · 24-08-2007, 02:17

Top Info Grants

That's saved me some time!

94AWDcoupe · 01-09-2007, 12:46

Installed power fc d-jetro from evo5 in my evo1. Did this without patch harness. Only two wires need to need to be added to harness to make fans work. Everything else works with no wire swaps. Including tach signals as the diagrams suggest the outputs for tach are different.

pin 20 and 21 are open on evo1 harness. I added those wires from scrap harness. Pin 20 gets connected to pin 16, and 21 goes to pin 3.

evo5
20=fan hi-a/c
21=fan lo

evo1-3
16=fan hi-a/c
3=fan lo

gtpumps · 02-09-2007, 21:54

Quote:

Originally posted by Wreckleford
It won't cause a problem. It is working the same as before, except that the a/c fan pins are being used to trigger the radiator fans as well as the a/c fans. The ECU only pulls the fan relays to ground, so it is not as if the total fan current is passing through the ECU.

How is this going to help? The A/C fan only operate when the A/C is operating??? So if the A/C is off you will have NO RADIATOR FAN at all

Also the A/C fan runs at low speed all the time when the A/C is on it's not eng temp controlled.

94AWDcoupe · 03-09-2007, 13:52

Quote:

Originally posted by gtpumps
How is this going to help? The A/C fan only operate when the A/C is operating??? So if the A/C is off you will have NO RADIATOR FAN at all
Also the A/C fan runs at low speed all the time when the A/C is on it's not eng temp controlled.

low signal triggers fans by temperature.
high signal triggers fans with a/c switch.

it will work fine

Wreckleford · 04-09-2007, 06:38

Quote:

Originally posted by gtpumps
How is this going to help? The A/C fan only operate when the A/C is operating??? So if the A/C is off you will have NO RADIATOR FAN at all
Also the A/C fan runs at low speed all the time when the A/C is on it's not eng temp controlled.

Did you ever try it? Don't assume then. If you look at the 7 service manual you will see that it triggers the a/c fan based on temperature whether or not the a/c is on, and it has two speeds depending on the coolant temp.

gtpumps · 04-09-2007, 07:51

Quote:

Originally posted by Wreckleford
Did you ever try it? Don't assume then. If you look at the 7 service manual you will see that it triggers the a/c fan based on temperature whether or not the a/c is on, and it has two speeds depending on the coolant temp.

I have been driving on an EVO7 ECU in my EVO6TME for 5 months

I have never seen the A/C fan come on without the A/C button ON and heater fan ON ie. air con operating.

At what engine temp is the A/C fan supposed to turn on?

Wreckleford · 07-09-2007, 21:21

The question I asked is if you ever tried to use the a/c fan outputs to control the radiator fan? I have done a IV and a VI using the a/c outputs like this and both bring on the fans whether or not the A/C is on. The manual even explains that it turns on the a/c fan based on temperature whether or not the a/c is on. That's how I got the idea to try it in the first place. I don't remember the exact temps that the fans come in, but it is stated in the manual.

As I explained before, with the VI you have to tie the radiator fan wire to the a/c fan wire as it has two seperate circuits to control the radiator fan and a/c fan. With the IV it is not necessary because the circuits are already tied from the factory (i.e. the four ECU does not have seperate outputs for a/c and radiator fans).

Thinking some more about it, based on what you described, your car is probably wired so that the radiator fan is running off of the low speed a/c output and the a/c condenser fan is running off of the high speed a/c output.

22-08-2007, 22:50	#32
cossie1 Senior User Join Date: Jun 2004 Location: On here Car: Evo 6 RSII, Forged Evo 8 Engine, Evo 7 Ralliart ECU + Map Switching + ALS, S1 Cams, FP Green Turbo Posts: 9,189	Ok just been looking at the e7 into an e6 option. If the above is correct, then the only pins to worry about would be pins 20,21,22 which all control the fans and the aircon ? and pin 87 which is Idle Switch ??? on the e6 and is ACD signal in on the e7. So what exactly would need to be done, and my reason for asking, is I have been offered a cheap evo 7 Ralliart Ecu. __________________

23-08-2007, 14:34	#33
Wreckleford Registered User Join Date: Feb 2000 Location: Kingston, Jamaica Car: Evo I GSR Posts: 960	Disconenct the idle switch wire. Then swap wires 32 and 34 (A/C Lo and Hi fan). Disconnect 20 and 21 (rad Lo and Hi fan)and connect 20 to the wire that is now at 32 and connect 21 to the wire that is now at 34. That's all that is needed. Edit: you might want to double check that the A/C Hi and Lo are correct for both the 7 and 6 pinouts above. I need to do this myself on the car I converted. __________________ HS Engineering marcus.hay@hsengineeringonline.com Last edited by Wreckleford : 23-08-2007 at 14:40.

23-08-2007, 14:38	#35
Wreckleford Registered User Join Date: Feb 2000 Location: Kingston, Jamaica Car: Evo I GSR Posts: 960	Yes, can't send it to you now though as I am at work, and no electricity at home due to the hurricane. __________________ HS Engineering marcus.hay@hsengineeringonline.com

23-08-2007, 15:43	#37
Wreckleford Registered User Join Date: Feb 2000 Location: Kingston, Jamaica Car: Evo I GSR Posts: 960	It won't cause a problem. It is working the same as before, except that the a/c fan pins are being used to trigger the radiator fans as well as the a/c fans. The ECU only pulls the fan relays to ground, so it is not as if the total fan current is passing through the ECU. __________________ HS Engineering marcus.hay@hsengineeringonline.com

23-08-2007, 23:55	#38
cossie1 Senior User Join Date: Jun 2004 Location: On here Car: Evo 6 RSII, Forged Evo 8 Engine, Evo 7 Ralliart ECU + Map Switching + ALS, S1 Cams, FP Green Turbo Posts: 9,189	Nice 1, thanks for the info. Will cutting pin 87 (Idle switch) have any effect on anything ? What exactly does that do ? Oh and am I correct in thinking the evo 7 RA ecu is better than the Evo 6 RA ecu ? __________________

23-08-2007, 14:37	#34
AndyF_RSX Moderator Join Date: Jun 2001 Location: Warrington Car: Coming very soon..... a Project EVO Posts: 11,897	Marcus, did you get my PM? Cheers Andy

24-08-2007, 02:17	#39
clivew Adrenaline Junkie Join Date: Feb 2001 Location: Bedford Car: Highly Modded Evo 6 T04Z 2.2ltr 800bhp/650lbs/ft. 309 MI16V Trackcar. Modified 306TD Posts: 1,884	Top Info Grants That's saved me some time! __________________ Don't judge me by your ability 'There is no worse bitterness than to reach the end of your life and realise you have not lived'

01-09-2007, 12:46	#40
94AWDcoupe Registered User Join Date: Sep 2006 Posts: 21	evo5 power FC in evo1-3 Installed power fc d-jetro from evo5 in my evo1. Did this without patch harness. Only two wires need to need to be added to harness to make fans work. Everything else works with no wire swaps. Including tach signals as the diagrams suggest the outputs for tach are different. pin 20 and 21 are open on evo1 harness. I added those wires from scrap harness. Pin 20 gets connected to pin 16, and 21 goes to pin 3. evo5 20=fan hi-a/c 21=fan lo evo1-3 16=fan hi-a/c 3=fan lo __________________ EVO 1 in USA 94AWDcoupe Last edited by 94AWDcoupe : 02-11-2007 at 00:34.

07-09-2007, 21:21	#45
Wreckleford Registered User Join Date: Feb 2000 Location: Kingston, Jamaica Car: Evo I GSR Posts: 960	The question I asked is if you ever tried to use the a/c fan outputs to control the radiator fan? I have done a IV and a VI using the a/c outputs like this and both bring on the fans whether or not the A/C is on. The manual even explains that it turns on the a/c fan based on temperature whether or not the a/c is on. That's how I got the idea to try it in the first place. I don't remember the exact temps that the fans come in, but it is stated in the manual. As I explained before, with the VI you have to tie the radiator fan wire to the a/c fan wire as it has two seperate circuits to control the radiator fan and a/c fan. With the IV it is not necessary because the circuits are already tied from the factory (i.e. the four ECU does not have seperate outputs for a/c and radiator fans). Thinking some more about it, based on what you described, your car is probably wired so that the radiator fan is running off of the low speed a/c output and the a/c condenser fan is running off of the high speed a/c output. __________________ HS Engineering marcus.hay@hsengineeringonline.com