Damo V

Been stripping out my old engine loom on my car, ready for my pectel loom... got a few Questions


What do these pins do on the ECU??

7,
12,
9,
10,
28...

Where does the std ECU take its perm live and IGN live from?

Does the ECU live up the fuel pump relay?


Also does anyone know if I can ditch the carbon canister and purge solonoid thing?...

Also on the loom to the ECU 3 wires go to the Lambda sensor obviously, what does the Green/Black wire do??... Because it simly goes to a soldered joint within bulkhead loom, consisting of 5 or 6 wires... being RED and Black/Red.. I tought this would be an IGN live but doesnt appear so I'm guessing the Black/red wires are some kind of switched live wires ??

These... you can see the green black wire from lambda here and the reds went to engine loom, one of the red/blacks went to amal valve plug....





Anyone got a set of wiring diagrams??

abdr500

iTrader: (1)

28 fuel pump relay
9 blank
10 blank may be main batt main relay
12a/c 4x4
7blank or may be knock sensor
correct me if iam wroung but this is just of the top off my head

Damo V

Cheers mate, Anyone confirm these??

Its P8 ECU by the way..

so you reckon 28 sends a live feed to the pump yeah?? that would kinda make sense..

and 10 may be main battery relay?? whats that then permanent live INTO the ECU??

BTW ALL the pins listed above have wires in them.. if that helps??

DazC

iTrader: (1)

I would have thought pin 28 would earth the relay, not send out a live...

Damo V

Right I get ya..

Pins 28 and 10 were circuits which were cut by an immobiliser ...

DazC

iTrader: (1)

Gareth T has a full list typed out already.

I have access to the full Escort Cossie diagrams if Gareth can't help with the list.

abdr500

iTrader: (1)

main live to the ecu when ignition is on would come from ignition switch but would pass into a relay first and then into ecu but no 100%sure

Damo V

Sweet ... come on Gareth Get online

I'm pretty sure I have done everything by the book , but want to be sure I have sorted all immobilised circuits ok, as obviously all the wires are black oh and this is the first time Ive done this

abdr500

iTrader: (1)

so what you doing takeing the immobiliser out or fitten on

Damo V

The immobiliser was attatched to ECU loom, but also went across bulkhead and a couple of wires went into bulkhead grommet to fusebox area, Im fairly sure they were just earths and IGN live, but there was 1 I wasnt entirely sure about, plus I want to be sure now I have all the ECU loom out, I have everything in order for new loom ;')


ALSO

There is a wire which I think comes from speed sensor plug goes through ECU loom grommet and plugs on to another wire in the kickwell.... as this for the ABS?

Damo V

boing

Fiecos Dan

here you go

PIN 1 (30-61A) Connection for ignition adjustment BROWN
PIN 1 (30-61B) Earth BROWN
PIN 2 Not Connected
PIN 3 ECU - CRANK SENSOR (31B-72) BROWN/RED
PIN 4 ECU - CRANK SENSOR (1-1A) GREEN/RED
PIN 5 (1-5) - Green / Yellow - Distributor (1-5)
PIN 6 Not Connected
PIN 7 Not Connected
PIN 8 Not Connected
PIN 9 Not Connected
PIN 10 BLUE - PIN85 POWER RELAY
PIN 11 - Manifold AIR TEMP SENSOR (31B-11C) BROWN/GREEN
PIN 11 ECU - MAP SENSOR (31B-11D)BROWN/GREEN (SHIELDED)
PIN 11 ECU - COOLANT TEMP SENSOR (31B-11C) BROWN/GREEN
PIN 11 ECU - THROTTLE POSITION SENSOR (31B-11A) BROWN/GREEN
PIN 12 (31B-35) BROWN/GREEN
PIN 13 Connection for ignition adjustment (15-10) BLACK/BLUE
PIN 14 Connection for ignition adjustment (15-9) BLACK/GREEN
PIN 15 ECU - MAP SENSOR (54-46) BLACK/RED (SHIELED)
PIN 16 ECU - AMAL VALVE (31B-68A)BROWN/GREEN
PIN 17 ECU - THROTTLE POSITION SENSOR (54-45) BLACK/YELLOW
PIN 18 ECU - Fuel Injector CYC 4 - (31B-43D) BROWN/WHITE
PIN 19 (31-61B) Earth BROWN
PIN 20 (30-42) RED PIN 87 POWER RELAY
PIN 21 Not Connected
PIN 22 Not Connected
PIN 23 (15-13) - Black / Red - Distributor (15-13)
PIN 24 IGNITION AMP (15-C)BLACK/RED
PIN 25 IGNITION AMP (15A)BLACK
PIN 26 Not Connected
PIN 27 Not Connected
PIN 28 BLUE/BLACK - PIN85 FUEL PUMP RELAY
PIN 29 ECU - COOLANT TEMP SENSOR (54-44) BLACK
PIN 30 ECU - MAP SENSOR (30-45)RED (SHIELDED)
PIN 30 ECU - THROTTLE POSITION SENSOR (30-45A) RED
PIN 31 - Manifold AIR TEMP SENSOR (30-46) RED
PIN 32 ECU - Fuel Injector CYC 2 - (31B-43B) BROWN/GREEN
PIN 33 ECU - Fuel Injector CYC 3 - (31B-43C) BROWN/BLACK
PIN 34 ECU IDLE SPEED CONTROL VALVE (31B-68CRG) GREEN/YELLOW
PIN 35 ECU - Fuel Injector CYC 1 - (31B-43A) BROWN/YELLOW

got from another link on p/f 2 months ago.

Damo V

some of that conflicts with info on 4x4 wiring diagrams? Is that for a 4x4?

DaveEscos

spk to ryan, he did all mine


when are these looms in then?

Damo V

Harvey should have yours now.... I wanna butchers when you get it

Mine should be farily soon

DaveEscos

when is he off on hols?

Damo V

He back on Tues, dunno if he back in business till weds though

DaveEscos

and text me your powdercoaters number.. are they quick turnaround.. ie no longer than a week!

Damo V

pmsl... will defo take longer than a week mate, what needs doing? I might be coming past yours later, box it all up I'll bell ya

DaveEscos

mate that would be superb. come down and ill get it boxed up

just got my adj tca's aswell

Damo V

ok I'll take them away with me too ... best you start nailing stuff down

DaveEscos

ECU Monitor Enthusiast

iTrader: (1)

Confirmation of a P8 ecu pin functions for you.....

1 POWER GROUND
2 LAMBDA SENSOR INPUT
3 CRANK SENSOR GROUND
4 CRANK SENSOR INPUT
5 PHASE SENSOR GROUND
6 KNOCK SENSOR GROUND
7 CANNISTER PURGE VALVE
8 DIAGNOSTIC SOCKET
9 LINK TO PIN 30
10 POWER RELAY
11 SENSORS GROUND
12 AIR CON CONTROL (IF FITTED)
13 OCTANE ADJUST PLUG
14 OCTANE ADJUST PLUG
15 MAP SENSOR INPUT
16 AMAL VALVE
17 THROTTLE POSITION SENSOR
18 INJECTOR 4
19 POWER GROUND
20 12 VOLTS POSITIVE SUPPLY
21 NOT USED
22 KNOCK SENSOR INPUT
23 PHASE SENSOR INPUT
24 IGNITION TRIGGER GROUND
25 IGNITION TRIGGER OUTPUT
26 NOT USED
27 DIAGNOSTIC SOCKET
28 FUEL PUMP RELAY
29 COOLANT SENSOR
30 SENSOR POSITIVE SUPPLY (5 VOLTS)
31 CHARGE AIR SENSOR
32 INJECTOR 2
33 INJECTOR 3
34 IDLE SPEED VALVE
35 INJECTOR 1

Damo V

Cheers Simon,

Pin 20, thats a perm live yeah?
28, that a switched earth switched on by ECU?
Pin 10 Is that a switched earth by ECU also?

Any Ideas on the green / black wire in the pic, which comes from the Lamda? ... I'm trying to confirm what that clump of wires is, ie is it a switched live when ECU is switched on etc, or is it lived up from Pump relay? as it doesnt live up when IGN on ...

any wiring diagrams at all??

I'm ofline shortly, but if anyone has some my email is damianvennard@aol.com

Cheers

DazC

iTrader: (1)

Ok, this is correct as per Ford wiring diagram for the Escort Cossie large turbo....

Pin 1 - Earth (brown)
Pin 19 - Earth (brown)
Pin 2 - Lambda sensor (brown/white)
Pin 20 - Power (red)
Pin 3 - Crank position sensor (brown/yellow)
Pin 21 - Not used
Pin 4 - Crank position sensor (green/red)
Pin 22 - Knock sensor (blue/yellow in shielded cable)
Pin 5 - Distributor phase sensor (green/yellow)
Pin 23 - Distributor phase sensor (black/red)
Pin 6 - Knock sensor (black/yellow with brown earth from shield)
Pin 24 - Pin 3 Ignition module (Black)
Pin 7 - Canister purge valve (brown/white)
Pin 25 - Pin 6 Ignition module (black)
Pin 8 - Electronic control loom (blue/white)
Pin 26 - Not used
Pin 9 - Connected throttle pot wire (Pin 30 red) (white)
Pin 27 - Electronic control loom (blue/yellow)
Pin 10 - EFI power relay pin 85 (relay 8) in fuse box (plug M3BB at fuse box) (blue/yellow)
Pin 28 - Fuel pump relay pin 85 (relay 9) in fuse box (plug M5B at fuse box) (blue/gree)
Pin 11 - Map sensor (shielded) and link to common connection* (brown/green)
Pin 29 - Coolant temp sensor (black/green)
Pin 12 - Not used
Pin 30 - MAP sensor and throttle pot sensor (red)
Pin 13 - Octane adjust (black)
Pin 31 - Air charge temp sensor (red/green)
Pin 14 - Octane adjust (black)
Pin 32 - Injector 2 (brown/black)
Pin 15 - MAP sensor (black/red)
Pin 33 - Injector 3 (brown/black)
Pin 16 - Boost valve (brown/yellow)
Pin 34 - Idle speed control valve (brown/yellow)
Pin 17 - Throttle pot sensor (black/red)
Pin 35 - Injector 1 (brown/black)
Pin 18 -Injector 4 (brown/black)

*Pin 11 (brown/green) connects to the following....

Electronic control loom
Coolant temp sensor
Throttle pot sensor
Aircharge temp sensor

Damo V

Also If I'm running a pectel board and loom, can I ditch the cannister purge valve thing yeah?

Damo V

Ah wire colours... cheers Daz

Its all coming together now ... I will try and suss it all out tommorrow, Cheers people

ECU Monitor Enthusiast

iTrader: (1)

Pin 20 is a SWITCHED ignition live NOT a permanent live.

Pin 10 is the sensor earth and must NOT be used for anything else.

Pin 28 is an earth switched output for the fuel pump relay.

DazC

iTrader: (1)

Black/green should be live with ignition as it comes from a common connection to supply power to the injectors, Pin 20 of the ECU, Idle speed control valve, Canister purge valve, and then the lambda sensor

Damo V

Thats what I thought Daz, but it isnt.....

Would you suggest as, pins 10 and 28 are not earthed, this would be why they arent live?

So how does the ECU get a Permanent live then? Obviously I imagine the new one will be direct to battery but Im interested to find out how the old one gets it

Damo V

what I will do is earth the wires which should go to pin

10 and 28, this should give me a pump live and hopefully IGN live on the wires in the pic...

ECU Monitor Enthusiast

iTrader: (1)

The ecu does NOT have a permanent live !!!!!!

When the ignition is on and the ecu is fitted,
the ecu links link 1 and 10 internally, this then in turns operates a relay in the fuse box which puts power onto pin 20 !!!!

Damo V

Oh right!! So how does it remember stuff?? I mean its suggested disconnecting the battery or removing ECU resets a number of codes etc If there is no perm live, how does it know whether battery on or off ?? How does that work then?

ECU Monitor Enthusiast

iTrader: (1)

It has non volatile flash memory to remember lambda learning tables !!!

I.E. memory that does NOT require power to remember!
The same way that memory cards work now !

Damo V

OH right... did you see that...WHOOOOOOOSHHH............ that last bit just flew straight over my head ... there it was gone...


Cheers Simon

DazC

iTrader: (1)

LOL! You can't train someone in auto electrics and electronics in a few hours on the internet!

Damo V

Sorted it... Gave the 2 wires I mentioned above an earth, which in turn gave me a fuel pump live and made the wires in the pic above live up too

Cheers, all I wanted to do was put my mind at rest and with the help of you guys I think I've done that ... Time will tel thoiugh, once I get my new loom in