ECU Connector Pin Out - LotusTalk - The Lotus Cars Community
 
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post #1 of 17 (permalink) Old 04-26-2006, 05:54 PM Thread Starter
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ECU Connector Pin Out

So I am looking at the connector.

Figured out how to remove it, pull the retention tab thingie. Cover snaps off. Got it. Very short service loop on the harness makes dealing with the connector more difficult.

A large number of wires. How do I know which pin is which number? Does anyone have a diagram?

Thanks

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post #2 of 17 (permalink) Old 04-26-2006, 06:01 PM
 
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Quote:
Originally Posted by Randy Chase
So I am looking at the connector. Figured out how to remove it, pull the retention tab thingie. Cover snaps off. Got it. Very short service loop on the harness makes dealing with the connector more difficult. A large number of wires. How do I know which pin is which number? Does anyone have a diagram? Thanks
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post #3 of 17 (permalink) Old 04-27-2006, 03:47 AM
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Once you have the connectors off the ECU, remove the 3 nuts that hold the ECU in place, and pull the ECU from the vehicle. With a good light, you'll be able to see little numbers in the plastic on the connectors on the ECU side, those are the pin numbers.

At least I remember seeing the numbers on one side or the other, but I can't possibly imagine how I would have seen them on the harness side, due to the short service loop you mentioned.
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post #4 of 17 (permalink) Old 04-27-2006, 05:10 AM
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Randy, email me and I will send you the pin diagram; I'd post it but it is in excel and I can't get the pin layout to format correctly. Also, I recommend double-checking pin function against the service manual.
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post #5 of 17 (permalink) Old 04-27-2006, 05:25 AM
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Quote:
Originally Posted by Evl
Once you have the connectors off the ECU, remove the 3 nuts that hold the ECU in place, and pull the ECU from the vehicle. With a good light, you'll be able to see little numbers in the plastic on the connectors on the ECU side, those are the pin numbers.
AND FROM: http://www.elisetalk.com/forums/show...8&postcount=73

Quote:
Originally Posted by aletes
1 Pre O2 Sensor - HT. Ground
3 Post O2 Sensor - Signal
4 Crank Sensor
6 SAI Pressure Sensor - Ground
7 Coolant Temperature
8 TP Sensor - 5v Reference
9 VSV (Canister Vent Close Valve)
11 VSV (ACIS) Airbox
12 Oil Control Valve VVL
13 Knock Sensor
14 Injector 3
15 Pre O2 Sensor - Signal
18 TMAF Sensor - IAT Ground
19 Knock Sensor
20 TP Sensor - Signal
21 Oil Pressure Switch - Block
22 Ignition Coil 1, 2, 3, & 4
24 Oil Pressure Switch (VVTIL)
25 Injector 1
26 Ignition Coil 2
27 Post O2 Sensor - HT. Ground
29 Post O2 Sensor - Ground
30 Crank Sensor
31 TMAF Sensor - MAF Ground
33 Coolant Temperature
34 TP Sensor - Ground
35 IAC Valve - Signal
36 SAI Pressure Sensor - 5v Reference
38 VSV (Purge Valve)
40 Injector 4
41 Pre O2 Sensor - Ground
43 Knock Sensor
44 TMAF Sensor - IAT Signal
45 TMAF Sensor - MAF Signal
47 Ignition Coil 3
48 Ignition Coil 4
49 Oil Control Valve - VVT
50 SAI Pressure Sensor - Signal
51 Injector 2
52 Ignition Coil 1
55 Fuel Tank Sender
76 Fuel Tank Sender
78 Fuel Tank Sender

ECU Bus
-------
SPL CAN_L: Pin 79
SPL CAN_N: Pin 80

Diagnostic Connector
--------------------
SPL CAN_N: Pin 6
SPL CAN_L: Pin 14
SPL U (GND): Pin 4 & 5

16-15-14-13-12-11-10-9
8--7--6--5--4--3--2--1


AND:
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Last edited by newman; 04-27-2006 at 06:04 AM.
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post #6 of 17 (permalink) Old 04-27-2006, 05:59 AM
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nevermind - Neeeeeeeeeeeewman got it ;-)

And jay Hassinger deserves credit for the emanage splicing part of this, I am pretty sure
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post #7 of 17 (permalink) Old 04-27-2006, 06:04 AM
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Quote:
Originally Posted by kverges
nevermind - Neeeeeeeeeeeewman got it ;-)

And jay Hassinger deserves credit for the emanage splicing part of this, I am pretty sure

good call. added the info.

2008 Aspen White Exige S240: SOLD
E30GTR: 500WHP/400FTLB Open to offers...
http://www.onyxsyndicate.com/newman
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post #8 of 17 (permalink) Old 04-27-2006, 07:42 AM Thread Starter
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Thanks guys!

Good info, specially about unbolting the ECU. Duh!

#somethingwickedthiswaycomes... the new Origin Noble M and the Origin 7

Zenos E10S for Sale! www.zenosforsale.com

There are some very shady dealers in the Lotus business.

2005 Lotus Elise, 1993 MR2, 1995 MR2, 125cc Shifter Kart, Toniq (in build), 2018 Origin 7 (waiting), 2018 Origin Noble M (waiting)
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post #9 of 17 (permalink) Old 04-27-2006, 08:24 AM
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i see at least one wrong pinout on that diagram so i'd double check it
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post #10 of 17 (permalink) Old 04-27-2006, 08:26 AM
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Quote:
Originally Posted by charliex
i see at least one wrong pinout on that diagram so i'd double check it

care to share?

2008 Aspen White Exige S240: SOLD
E30GTR: 500WHP/400FTLB Open to offers...
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post #11 of 17 (permalink) Old 04-27-2006, 08:30 AM
 
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Quote:
Originally Posted by newman
care to share?
Guys, register and look at all the stuff at www.moremonkey.com ...especially if you are interested in the Lotus ECU...go there. Charlie is a supercat. You have to register to view all of the forums.

Last edited by Stan; 04-27-2006 at 08:33 AM.
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post #12 of 17 (permalink) Old 04-27-2006, 10:16 AM
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Quote:
Originally Posted by Stan
Charlie is a supercat. .
gezz.. I wish I understood even half the stuff he posts under there..

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post #13 of 17 (permalink) Old 04-28-2006, 03:04 PM
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have schematic, will scan

Randy,

I have a paper copy of the schematic that I can contribute if the pdf of the same thing is difficult to read. I confirmed portions to charliex already and can do the same here if needed.

If others want the same information, I can high resolution scan and add here.

Michael

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antique coin op repair
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post #14 of 17 (permalink) Old 05-10-2006, 07:34 AM
 
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Please do!
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post #15 of 17 (permalink) Old 09-22-2017, 09:51 AM
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My ECU didnt get power due to a bad GND cable (pin 78)

PS! this is for a 2005 2ZZ engine ECU.
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post #16 of 17 (permalink) Old 01-20-2019, 03:58 PM
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Much better / more complete pinout here (attaching excerpt in case the link expires):
http://data.radiumauto.com/PublicDocs/19-0046.PDF
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File Type: pdf pin-outs.pdf (266.3 KB, 71 views)
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post #17 of 17 (permalink) Old 04-02-2019, 12:51 PM
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Quote:
Originally Posted by Randy Chase View Post
So I am looking at the connector.

Figured out how to remove it, pull the retention tab thingie. Cover snaps off. Got it. Very short service loop on the harness makes dealing with the connector more difficult.

A large number of wires. How do I know which pin is which number? Does anyone have a diagram?

Thanks
Hi Randy,
How do you get the cover off the wire harness connector after you remove it from the ECU?
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