Megasquirt error board pinout Q
09-29-06, 03:03 PM
#1
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error board pinout Q
I got the pdf provided by glen's garage, but wanted to ask and be sure.
It says the 2 pin wheel is the base wheel, and the 24 pin wheel is the reset wheel. I think the terms are backwards and I'm wondering which one is correct.
G (2 pin) should go to: T1 and T5
Ne (24 pin) should go to: T2 and T6
Correct? Pretty sure it is, but just to be on the safe side...
My plug n play cable is ready except for these two wires. I am 100% for sure going to be hooking it up this weekend, finally.
http://www.msefi.com/viewtopic.php?t...r=asc&start=60
It says the 2 pin wheel is the base wheel, and the 24 pin wheel is the reset wheel. I think the terms are backwards and I'm wondering which one is correct.
G (2 pin) should go to: T1 and T5
Ne (24 pin) should go to: T2 and T6
Correct? Pretty sure it is, but just to be on the safe side...
My plug n play cable is ready except for these two wires. I am 100% for sure going to be hooking it up this weekend, finally.
Dual VR Conditioning Circuit
T1 - VR Sensor #1 Input (To Base wheel - i.e. 2pin Wheel in rotary)
T5 - VR Sensor #1 GND /w Load Resistor
T3 - Conditioned Output for VR Sensor #1 [Pin 6 of U4 on MS Board]
T2 - VR Sensor #2 Input (To Reset wheel - i.e 24pin wheel in rotary)
T6 - VR Sensor #2 GND /w Load Resistor
T4 - Conditioned Output for VR Sensor #2 [Pin 11 on U1 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
T1 - VR Sensor #1 Input (To Base wheel - i.e. 2pin Wheel in rotary)
T5 - VR Sensor #1 GND /w Load Resistor
T3 - Conditioned Output for VR Sensor #1 [Pin 6 of U4 on MS Board]
T2 - VR Sensor #2 Input (To Reset wheel - i.e 24pin wheel in rotary)
T6 - VR Sensor #2 GND /w Load Resistor
T4 - Conditioned Output for VR Sensor #2 [Pin 11 on U1 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
09-29-06, 08:42 PM
#2
I believe it should read like this.Someone could correct me if it's not.
Dual VR Conditioning Circuit
T1 - VR Sensor #2 Input (To Reset wheel - i.e. 2pin Wheel in rotary)
T5 - VR Sensor #2 GND /w Load Resistor
T3 - Conditioned Output for VR Sensor #1 [Pin 11 on U1 on MS Board] *1.0k ohm resister
T2 - VR Sensor #1 Input (To Base wheel - i.e 24pin wheel in rotary)
T6 - VR Sensor #1 GND /w Load Resistor
T4 - Conditioned Output for VR Sensor #2 [Pin 6 of U4 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
Dual VR Conditioning Circuit
T1 - VR Sensor #2 Input (To Reset wheel - i.e. 2pin Wheel in rotary)
T5 - VR Sensor #2 GND /w Load Resistor
T3 - Conditioned Output for VR Sensor #1 [Pin 11 on U1 on MS Board] *1.0k ohm resister
T2 - VR Sensor #1 Input (To Base wheel - i.e 24pin wheel in rotary)
T6 - VR Sensor #1 GND /w Load Resistor
T4 - Conditioned Output for VR Sensor #2 [Pin 6 of U4 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
09-29-06, 10:22 PM
#3
Just to clarify,this is for error*'s Version 1 MS'nS-extra daughter board correct? That documentation which error wrote was wrong.Muythaibxr posted a fixed up document version of the VR connections to the board.
That was still a little confusing and I think it should read what I posted in my previous post.Muythaibxr,can you confirm that?thanks
Note: Since I can't edit my previous post ,T3 should read "Conditioned Output for VR Sensor #2" and T4 should read "Conditioned Output for VR Sensor#1".
Revised Wiring Instructions
--------------------------------------------------------------------------------
Last edited by muythaibxr : 10-29-05 at 05:27 PM.
--------------------------------------------------------------------------------
Here it Is!
Connections and Wiring
----------------------
Dual VR Conditioning Circuit
T1 - VR Sensor #1 Input (To Base wheel - i.e. 2pin Wheel in rotary)
T5 - VR Sensor #1 GND /w Load Resistor
T3 - Conditioned Output for VR Sensor #1 [Pin 11 on U1 on MS Board]
T2 - VR Sensor #2 Input (To Reset wheel - i.e 24pin wheel in rotary)
T6 - VR Sensor #2 GND /w Load Resistor
T4 - Conditioned Output for VR Sensor #2 [Pin 6 on U4 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
--------------------------------------------------------------------------------
Last edited by muythaibxr : 10-29-05 at 05:27 PM.
--------------------------------------------------------------------------------
Here it Is!
Connections and Wiring
----------------------
Dual VR Conditioning Circuit
T1 - VR Sensor #1 Input (To Base wheel - i.e. 2pin Wheel in rotary)
T5 - VR Sensor #1 GND /w Load Resistor
T3 - Conditioned Output for VR Sensor #1 [Pin 11 on U1 on MS Board]
T2 - VR Sensor #2 Input (To Reset wheel - i.e 24pin wheel in rotary)
T6 - VR Sensor #2 GND /w Load Resistor
T4 - Conditioned Output for VR Sensor #2 [Pin 6 on U4 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
Note: Since I can't edit my previous post ,T3 should read "Conditioned Output for VR Sensor #2" and T4 should read "Conditioned Output for VR Sensor#1".
Last edited by The Griffin; 09-29-06 at 10:44 PM.
09-30-06, 10:33 PM
#4
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The board I have is one of the first boards error put out. (The first batch sold, not the betas) So, I guess it's version 1? It has the transistor layout that is opposite the megasquirt mainboard. I haven't kept up with the msefi.com forums for the latest advancements lately. So, I dunno.
It is confusing you're right.. I had some conflicting information when I built this originally a year or so ago. I somehow got the G and Ne circuits mixed up, not just the inputs. Either my fault or the pinout I followed. The site that originally hosted error's pinout diagram is down. The one I got is from Glen's garage and it correlates what I found on the msefi.com forum which is what I copied above..
I'm just going to use what I think is correct and we'll see. I will hook it up to the car tomorrow. I'll post up how it goes!
It is confusing you're right.. I had some conflicting information when I built this originally a year or so ago. I somehow got the G and Ne circuits mixed up, not just the inputs. Either my fault or the pinout I followed. The site that originally hosted error's pinout diagram is down. The one I got is from Glen's garage and it correlates what I found on the msefi.com forum which is what I copied above..
I'm just going to use what I think is correct and we'll see. I will hook it up to the car tomorrow. I'll post up how it goes!
10-01-06, 02:49 PM
#5
That's the same one I have.If you are looking at the error* board (reading the printings rightside up)the top Lm1815 circuit "U2"(T1,T5,T3) is the 2pin(tooth) "reset wheel"circuit with the 82K ohm resistor.Muythaibxr posted the correct connections so you want to make sure that T3 goes through a 1.0k ohm resistor to U1-Pin11 on the MSv2.2 board and T4 goes to U4-pin 6 on the MSv2.2 board.I just changed the wording and called the top circuit on the error* borard VR sensor#2 and the bottom one VR sensor#1.I'm pretty sure that also corresponds to the dual VR circuit schematic in the FAQ's(which is now not there).Hopefully Muythaibxr can add that back in to the FAQ for the select few folks that want to build an extra LM1815 circuit in the proto area for the reset wheel on the MSv3 board instead of modifying the CAS.
Last edited by The Griffin; 10-01-06 at 03:07 PM.
10-02-06, 01:51 PM
#6
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I looked over the faq and compared it to the schematic. Also, looking at a pic of the board here: [Megascott's post]
http://www.msefi.com/viewtopic.php?t...r=asc&start=40
I'm still not sure which is correct. Looking at this board, and going by what's written in the FAQ:
U1 is grouped with T2, T6, and T4, the 24pin circuit. Goes to pin 6 of U4 on the MS Board.
U2 is grouped with T3, T5 and T1, the 2pin circuit. Goes to pin 11 on U1 on the MS Board.
However, in yet another pic: [t3bunny's post]
http://www.msefi.com/viewtopic.php?t...=asc&start=100
The 82k ohm resistor in the FAQ listed as coming off of pin 8 for U1 actually comes off of U2, apparently, and vice versa for the 56k ohm resistor. So, maybe error's use of the U1 and U2 circuits are backwards from what is listed in the schematic in the FAQ??
Damn, I am confused...
The dual lm1815 circuit is pretty similar on both sides except for the 56k and 82k resistors... Does it really matter if both the inputs and outputs get mixed up together? I've ran my car this way before and don't remember any problems from it. I'm a little more hesitant to run it again, though. My FC is a little nicer than my previous 'test car'.
http://www.msefi.com/viewtopic.php?t...r=asc&start=40
I'm still not sure which is correct. Looking at this board, and going by what's written in the FAQ:
(these instructions are for a v2.2 board)
Basically, VR1 should be wired to the Ne+ wire on the CAS (24 tooth VR sensor positive lead). That VR sensor's ground should be grounded to the lm1815 board you use). VR2 should be wired to the G+ wire leaving the CAS (2 tooth VR sensor positive lead). It's ground should also run to the lm1815 board.
OUT1 should be wired to pin 6 of U4 on the megasquirt board. U4 is a six pin chip... also known as the opto-isolator. OUT2 should be wired through a 1k resistor to pin 11 on the CPU.
Basically, VR1 should be wired to the Ne+ wire on the CAS (24 tooth VR sensor positive lead). That VR sensor's ground should be grounded to the lm1815 board you use). VR2 should be wired to the G+ wire leaving the CAS (2 tooth VR sensor positive lead). It's ground should also run to the lm1815 board.
OUT1 should be wired to pin 6 of U4 on the megasquirt board. U4 is a six pin chip... also known as the opto-isolator. OUT2 should be wired through a 1k resistor to pin 11 on the CPU.
U2 is grouped with T3, T5 and T1, the 2pin circuit. Goes to pin 11 on U1 on the MS Board.
However, in yet another pic: [t3bunny's post]
http://www.msefi.com/viewtopic.php?t...=asc&start=100
The 82k ohm resistor in the FAQ listed as coming off of pin 8 for U1 actually comes off of U2, apparently, and vice versa for the 56k ohm resistor. So, maybe error's use of the U1 and U2 circuits are backwards from what is listed in the schematic in the FAQ??
Damn, I am confused...
The dual lm1815 circuit is pretty similar on both sides except for the 56k and 82k resistors... Does it really matter if both the inputs and outputs get mixed up together? I've ran my car this way before and don't remember any problems from it. I'm a little more hesitant to run it again, though. My FC is a little nicer than my previous 'test car'.
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10-03-06, 07:44 PM
#8
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Okay, Griffin, I looked over the schematic again, and I'm finally convinced you're right. It just took me a little while to sort out the misinformation I had.
Below is the 'correct 100% for sure' pinout for error's version 1 daughterboard. For ignition, anyways. It's from your post above, Griffin, but I added some info about wiring it up to s4 cars. s5 cars' ECU connections are different, so s5 people looking for the same info, be advised.
Thanks for the help.
Dual VR Conditioning Circuit
T1 - VR Sensor #2 Input (To Reset wheel - 2pin G Wheel) (1N, Green, G+)
T5 - VR Sensor #2 GND /w Load Resistor (1P, Blue, G-)
T3 - Conditioned Output for VR Sensor #2 [Pin 11 on U1 on MS Board] *1.0k ohm resistor
T2 - VR Sensor #1 Input (To Base wheel - 24pin Wheel) (1T, Red, Ne+)
T6 - VR Sensor #1 GND /w Load Resistor (1Q, White, Ne-)
T4 - Conditioned Output for VR Sensor #1 [Pin 6 of U4 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
Below is the 'correct 100% for sure' pinout for error's version 1 daughterboard. For ignition, anyways. It's from your post above, Griffin, but I added some info about wiring it up to s4 cars. s5 cars' ECU connections are different, so s5 people looking for the same info, be advised.
Thanks for the help.
Dual VR Conditioning Circuit
T1 - VR Sensor #2 Input (To Reset wheel - 2pin G Wheel) (1N, Green, G+)
T5 - VR Sensor #2 GND /w Load Resistor (1P, Blue, G-)
T3 - Conditioned Output for VR Sensor #2 [Pin 11 on U1 on MS Board] *1.0k ohm resistor
T2 - VR Sensor #1 Input (To Base wheel - 24pin Wheel) (1T, Red, Ne+)
T6 - VR Sensor #1 GND /w Load Resistor (1Q, White, Ne-)
T4 - Conditioned Output for VR Sensor #1 [Pin 6 of U4 on MS Board]
T1 and T5 should be for the 2 pin wheel
T2 and T6 should be for the 24 pin wheel
Last edited by jayroc; 10-03-06 at 07:52 PM.
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