DME pinout for reference sensor?
04-27-2010, 12:35 AM
#1
Burning Brakes
Thread Starter
DME pinout for reference sensor?
I've searched to no avail 
I'm not sure if the earlier models use the same pins for checking speed and reference sensors, so a quick insight would be mucho appreciated.
What I understand is that on the 84-89, you can check between pins 8 & 27 for speed, and 25 & 26 for reference.
Is this the same for the 993?
Thanks guys!
I'm not sure if the earlier models use the same pins for checking speed and reference sensors, so a quick insight would be mucho appreciated.
What I understand is that on the 84-89, you can check between pins 8 & 27 for speed, and 25 & 26 for reference.
Is this the same for the 993?
Thanks guys!
04-27-2010, 11:23 AM
#2
Race Car
See Below for a 55pin 1995 ECU the pin outs you are looking for are 48 and 49.
ECU
55 Diagnosis K wire
54 Characteristic map switch
53 Throttle potentiometer
52 Throttle position to transmission control unit
51 Transmission input
50 Knocking yes/no
49 Speed/reference mark sender +
48 Speed/reference mark sender -
47 Intake air temperature
45 ECTS II
44 Tiptronic coding
42 Selector lever switch
41 Heating control unit
40 AC compressor coupling
37 DME relay 87
36 Ground, DME relay 85
35 Injector valve cylinder 2
34 Injector valve cylinder 4
33 Tank vent
32 Auxiliary air pump (USA)
31 Final stage ignition circuit 2
30 Ground, knock sensors
29 Knock sensor 2
28 Oxygen sensor / CO potentiometer
27 Terminal 15
26 Ground, mass air flow sensor
25 Final stage ignition circuit 1
24 Ground, remaining final stages
23 Injector valve cylinder 5
22 Intake manifold flap closed
21 Check Engine monitor (USA)
20 Oxygen sensor heating
19 Ground, electronics, all shields
18 Battery +
17 Injector valve cylinder 1
16 Injector valve cylinder 6
14 Ground, throttle potentiometer f NTCs
13 Diagnosis L wire
12 Positive supply throttle potentiometer fHal1 sender
11 Knock sensor 1
10 Ground, oxygen sensor
9 Vehicle speed
8 Hall sender signal
7 Mass air flow sensor signal
6 Rev. counter
5 Injector valve cylinder 3
4 Intake manifold flap open
3 Ground, DME relay 85 b
1 Resonance flap
ECU
55 Diagnosis K wire
54 Characteristic map switch
53 Throttle potentiometer
52 Throttle position to transmission control unit
51 Transmission input
50 Knocking yes/no
49 Speed/reference mark sender +
48 Speed/reference mark sender -
47 Intake air temperature
45 ECTS II
44 Tiptronic coding
42 Selector lever switch
41 Heating control unit
40 AC compressor coupling
37 DME relay 87
36 Ground, DME relay 85
35 Injector valve cylinder 2
34 Injector valve cylinder 4
33 Tank vent
32 Auxiliary air pump (USA)
31 Final stage ignition circuit 2
30 Ground, knock sensors
29 Knock sensor 2
28 Oxygen sensor / CO potentiometer
27 Terminal 15
26 Ground, mass air flow sensor
25 Final stage ignition circuit 1
24 Ground, remaining final stages
23 Injector valve cylinder 5
22 Intake manifold flap closed
21 Check Engine monitor (USA)
20 Oxygen sensor heating
19 Ground, electronics, all shields
18 Battery +
17 Injector valve cylinder 1
16 Injector valve cylinder 6
14 Ground, throttle potentiometer f NTCs
13 Diagnosis L wire
12 Positive supply throttle potentiometer fHal1 sender
11 Knock sensor 1
10 Ground, oxygen sensor
9 Vehicle speed
8 Hall sender signal
7 Mass air flow sensor signal
6 Rev. counter
5 Injector valve cylinder 3
4 Intake manifold flap open
3 Ground, DME relay 85 b
1 Resonance flap
04-27-2010, 05:41 PM
#6
Burning Brakes
Thread Starter
I rarely work on 911-series cars... But if I did, I'd certainly get one! (the manuals)
I'm lending a hand on a nicely built 993. He had it fired for the first time on friday, and now it wont fire. He added more oil and now nothing... No tach-bounce, no fuel pump activity... I'm going to test a few things today and see what I can get figured out, but he's said he checked the DME relay, so I'm theorizing on a few simple things to rule-out.
These cars dont have an over-fill protection for the oil, do they?
The car is pretty neat though: full cage, custom made carbon roof skin for sunroof delete, 3.8RS wing (for sale, polar silver, perfect), flared, light interior, KW suspension, adjustable sways, huge Kinesis wheels, etc.
I'll try and snap a few pics while I'm there today. He's working on a few other ones too, and Ralph Meaney's 914 is in the shop as well
I'm lending a hand on a nicely built 993. He had it fired for the first time on friday, and now it wont fire. He added more oil and now nothing... No tach-bounce, no fuel pump activity... I'm going to test a few things today and see what I can get figured out, but he's said he checked the DME relay, so I'm theorizing on a few simple things to rule-out.
These cars dont have an over-fill protection for the oil, do they?
The car is pretty neat though: full cage, custom made carbon roof skin for sunroof delete, 3.8RS wing (for sale, polar silver, perfect), flared, light interior, KW suspension, adjustable sways, huge Kinesis wheels, etc.
I'll try and snap a few pics while I'm there today. He's working on a few other ones too, and Ralph Meaney's 914 is in the shop as well
06-02-2010, 03:25 PM
#7
Addict
Rennlist Member
Rennlist Member
So, with all that info, if I were hooking up a Traqmate, I could tap into 6 for the RPM...would I also be able to get throttle position from the DME? If so, there are about 3-4 marked Throttle on that list. Which would work?
Thanks,
Thanks,
Trending Topics
06-02-2010, 04:00 PM
#8
Rennlist Member
https://rennlist.com/forums/993-foru...gnal-wire.html
Originally Posted by TheOtherEric
For my 1995, I tapped into an RPM signal wire where the thick pack of wires connects to the ECU under the drivers seat. Like Loren said, it's pin 6, which doesn't mean anything to me, except that looking at the electrical schematics in the shop manual, you'll find that pin 6 is Black/Violet. So tap that one. I suppose that this signal will be pulse-width modulated (frequency modulated) since I think it comes straight from the sensor which reads off a gear. The gear has either 58 or 60 teeth; hard to understand the shop manual's description (60 teeth with 2 missing for a reference signal). Your volt meter won't give you anything meaningful if you try to check it since it can't measure frequencies. But I think it's like a 5V signal.
And if you're hooking up a DA system, you should tap the throttle position sensor while you're at it. It's pin 53, which is White/Green. I verified this with a volt meter but I'm not sure of the numbers (0.5 to 4.5 volts, I think).
Both of these taps seemed to work fine when I hooked up my DA system. Somebody had posted these wire colors last year http://forums.rennlist.com/rennforum...d.php?t=140726
but the wire colors were not correct for a 1995 (not sure about '96).
And if you're hooking up a DA system, you should tap the throttle position sensor while you're at it. It's pin 53, which is White/Green. I verified this with a volt meter but I'm not sure of the numbers (0.5 to 4.5 volts, I think).
Both of these taps seemed to work fine when I hooked up my DA system. Somebody had posted these wire colors last year http://forums.rennlist.com/rennforum...d.php?t=140726
but the wire colors were not correct for a 1995 (not sure about '96).
https://rennlist.com/forums/racing-a...ta-inputs.html
Originally Posted by TheOtherEric
p.s. here's the thread you want:
http://forums.rennlist.com/rennforum...d.php?t=188509
And if you're using a DL1, here are some more instructions I wrote for somebody else:
First off, you should grab a volt meter
and make sure your throttle signal is working. You need to turn the
ignition on first, of course. You should get like 0.5 to 4.5 volts,
or thereabouts. Write down the min and max. Measuring the RPM signal
with a VOM doesn't tell you much because it's frequency-modulated, not
amplitude modulated.
Plug the one throttle wire into any of the 5v Analog slots on the
connector block you should have gotten with your DL1. I use Analog1.
Plug the RPM wire into the 5v RPM slot. You need a tiny flathead
screwdriver for the connector block.
Now you have a signal for throttle ranging from v1 to v2 (approx 0.5
to 4.5v). You can convert this to % if you prefer using a
user-defined variable: % = mV + b, where b = 100*v1/(v1-v2) and
m=-b/v1 and V=your signal. So your user-defined variable has an
equation like: VAR_29*25-0.5 I haven't used Vers6 much yet, so I'm
not sure where that's inputted.
For RPMs, you need to tell the software (under car setup) that you
have 3 ignition pulses per revolution.
Now make sure that you've selected that data to be processed (before
opening up your data) and you're done. If you have a USB to Serial
adapter you can run the DL1 monitor and watch the values on your pc
screen to verify everything is working ok.
http://forums.rennlist.com/rennforum...d.php?t=188509
And if you're using a DL1, here are some more instructions I wrote for somebody else:
First off, you should grab a volt meter
and make sure your throttle signal is working. You need to turn the
ignition on first, of course. You should get like 0.5 to 4.5 volts,
or thereabouts. Write down the min and max. Measuring the RPM signal
with a VOM doesn't tell you much because it's frequency-modulated, not
amplitude modulated.
Plug the one throttle wire into any of the 5v Analog slots on the
connector block you should have gotten with your DL1. I use Analog1.
Plug the RPM wire into the 5v RPM slot. You need a tiny flathead
screwdriver for the connector block.
Now you have a signal for throttle ranging from v1 to v2 (approx 0.5
to 4.5v). You can convert this to % if you prefer using a
user-defined variable: % = mV + b, where b = 100*v1/(v1-v2) and
m=-b/v1 and V=your signal. So your user-defined variable has an
equation like: VAR_29*25-0.5 I haven't used Vers6 much yet, so I'm
not sure where that's inputted.
For RPMs, you need to tell the software (under car setup) that you
have 3 ignition pulses per revolution.
Now make sure that you've selected that data to be processed (before
opening up your data) and you're done. If you have a USB to Serial
adapter you can run the DL1 monitor and watch the values on your pc
screen to verify everything is working ok.
