Voltage Tables

[Shel-Game]

Where did that charge temp data come from? It's different than the transfer function that's stored in the cals. But, all Chryslers (that I've seen the cals for) use the same temperature sensor for both coolant and charge temp (where applicable). Even the Neon...

[XR Tuner]

Voltage table for k type thermocouple F

0.000000, 32
0.000397, 50
0.000798, 68
0.001203, 86
0.001612, 104
0.002023, 122
0.002436, 140
0.002851, 158
0.003267, 176
0.003682, 194
0.004096, 212
0.004509, 230
0.004920, 248
0.005328, 266
0.005735, 284
0.006138, 302
0.006540, 320
0.006941, 338
0.007340, 356
0.007739, 374
0.008138, 392
0.008539, 410
0.008940, 428
0.009343, 446
0.009747, 464
0.010153, 482
0.010561, 500
0.010971, 518
0.011382, 536
0.011795, 554
0.012209, 572
0.012624, 590
0.013040, 608
0.013457, 626
0.013874, 644
0.014293, 662
0.014713, 680
0.015133, 698
0.015554, 716
0.015975, 734
0.016397, 752
0.016820, 770
0.017243, 788
0.017667, 806
0.018091, 824
0.018516, 842
0.018941, 860
0.019366, 878
0.019792, 896
0.020218, 914
0.020644, 932
0.021071, 950
0.021497, 968
0.021924, 986
0.022350, 1004
0.022776, 1022
0.023203, 1040
0.023629, 1058
0.024055, 1076
0.024480, 1094
0.024905, 1112
0.025330, 1130
0.025755, 1148
0.026179, 1166
0.026602, 1184
0.027025, 1202
0.027447, 1220
0.027869, 1238
0.028289, 1256
0.028710, 1274
0.029129, 1292
0.029548, 1310
0.029965, 1328
0.030382, 1346
0.030798, 1364
0.031213, 1382
0.031628, 1400
0.032041, 1418
0.032453, 1436
0.032865, 1454
0.033275, 1472
0.033685, 1490
0.034093, 1508
0.034501, 1526
0.034908, 1544
0.035313, 1562
0.035718, 1580
0.036121, 1598
0.036524, 1616
0.036925, 1634
0.037326, 1652
0.037725, 1670
0.038124, 1688
0.038522, 1706
0.038918, 1724
0.039314, 1742
0.039708, 1760
0.040101, 1778
0.040494, 1796
0.040885, 1814
0.041276, 1832
0.041665, 1850
0.042053, 1868
0.042440, 1886
0.042826, 1904
0.043211, 1922
0.043595, 1940
0.043978, 1958
0.044359, 1976
0.044740, 1994
0.045119, 2012

[Vilpo]

Quote:

Originally Posted by NAJ TPS Response Chart Throttle Position in Degrees to Increase of Minimum TPS Volts Closed Throttle 10 DEGS/0.00V 20 DEGS/0.38V 30 DEGS/0.75V Half Throttle 45 DEGS/1.31V 58 DEGS/1.80V (1) 75 DEGS/2.43V (2) Wide Open Throttle 90 DEGS/3.00V (1) The computer will usually consider an increase of 1.80 volts or more over the minimum TPS voltage to be WOT. (2)2.43 volts above the minimum TPS voltage during cranking will cause the computer to recognize Clear Flood request shutting off all fuel delivery.

Is this data the same for the N/A 3.0 v6?

[NAJ]

It should be, all 3 wire variable resistor sensors (Map and TPS) operate on the same 5 volt reference.The only exceptions to this would be a N/A and Turbo Map as the Turbo has to read above atmospheric(boost).Changing from manufacturer to manufactuer the voltage reading may be different as far as what thier controller parameters are set to see as normal but the MAP and TPS will still read 0- 5volts.
The voltage tables posted are for Chrysler Vehicles.When you check TPS you are looking for excessivly low or high readings with the throttle closed(will set a code) or dead spots when you sweep the TPS.

[UnaClocker]

Quote:

Originally Posted by 87turbodance oooohhhh. thanks. That kind of info would be very valuable for MegaSquirt EFI :: Index users.

Nah, not really. Just use a 10k bias resistor when assembling the MS, and the stock TD (and Neon) sensors work great. It's even written in the assembly instructions.

[Vilpo]

Quote:

Originally Posted by NAJ It should be, all 3 wire variable resistor sensors (Map and TPS) operate on the same 5 volt reference.The only exceptions to this would be a N/A and Turbo Map as the Turbo has to read above atmospheric(boost).Changing from manufacturer to manufactuer the voltage reading may be different as far as what thier controller parameters are set to see as normal but the MAP and TPS will still read 0- 5volts. The voltage tables posted are for Chrysler Vehicles.When you check TPS you are looking for excessivly low or high readings with the throttle closed(will set a code) or dead spots when you sweep the TPS.

Ok, thanks. I was just confused about this since my data-cd says the TPS should output 1-5volts, when this voltage table says 0-3volts. But i would believe this info to be correct since i get like a bit over 3 volts max on my sensor.

[NAJ]

All sensors weather they are 3 wire variable resistors(MAP, TPS) or 2 wire thermistors
(ACT,CTS) operate on a 5 volt reference.
Anytime you have a problem with a sensor circuit unplug the connector at the sensor and with the key on using a digital voltmeter probe the 5 volt reference line to ground and you should read 5 volts.Then probe the reference line and the signal return line(controller ground) and you should read 5 volts.This verifies these 2 circuits are ok.
Then plug the connector back in and backprobe the signal line and signal ground to check the voltage output of the sensor and backprobe and check at the controller,the voltage should read the same,this verifies the signal line is ok.
Once you verify the circuit's are ok you can compare voltages to the voltage table to check sensor operation.
Without a scan tool you cannot verify what the controller is actually seeing.

[speeduphoria]

Nice i missed this thread, I have some values for GM 3 bar map, GM air temp, I will get part numbers shortly. These are used for my SDS standalone but may help MS guys, I can also get the GM Coolant temp.

GM 3 bar map sensor(-psi means vac)
PSI/Vac Volt
-28.5, 0.078
-27.1, 0.156
-25.7, 0.234
-24.2, 0.313
-22.8, 0.391
-21.4, 0.469
-19.9, 0.547
-18.6, 0.625
-17.1, 0.703
-15.7, 0.781
-14.8, 0.859
-12.9, 0.938
-11.4, 1.016
-10.0, 1.094
-8.60, 1.172
-7.17, 1.25
-5.75, 1.328
-4.33, 1.406
-2.91, 1.484
-1.49, 1.563
-0.06, 1.641
0.670, 1.719
1.370, 1.797
2.060, 1.875
2.760, 1.953
3.460, 2.031
4.160, 2.109
4.860, 2.188
5.560, 2.266
6.250, 2.344
6.950, 2.422
7.650, 2.5
8.350, 2.578
9.050, 2.656
9.750, 2.734
10.40, 2.813
11.10, 2.891
11.80, 2.969
12.50, 3.047
13.20, 3.125
13.90, 3.203
14.60, 3.281
15.30, 3.359
16.00, 3.438
16.70, 3.516
17.40, 3.594
18.10, 3.672
18.80, 3.75
19.50, 3.828
20.20, 3.906
20.90, 3.984
21.60, 4.063
22.30, 4.141
23.00, 4.219
23.70, 4.297
24.40, 4.375
25.10, 4.453
25.80, 4.531
26.50, 4.609
27.20, 4.688
27.90, 4.766
28.60, 4.844
29.00, 4.922
30.00, 5



GM Air temp sensor
degF Volt
320 0.04
293 0.12
257 0.2
221 0.28
203 0.36
192 0.44
183 0.51
176 0.59
169 0.67
162 0.75
154 0.83
147 0.91
142 0.99
138 1.07
135 1.15
131 1.23
127 1.31
126 1.39
122 1.47
120 1.54
117 1.62
113 1.7
109 1.78
106 1.86
104 1.94
102 2.02
99. 2.1
95. 2.18
93. 2.26
91. 2.34
90. 2.42
88. 2.5
84. 2.57
81. 2.65
77. 2.73
75. 2.81
73. 2.89
72. 2.97
70. 3.05
68. 3.13
66. 3.21
63. 3.29
61. 3.37
59. 3.45
57. 3.53
55. 3.6
52. 3.68
48. 3.76
46. 3.84
45. 3.92
41. 4
39. 4.08
36. 4.16
34. 4.24
32. 4.32
27. 4.4
23. 4.48
19. 4.56
14. 4.63
5.0 4.71
-4. 4.79
-13 4.87
-31 4.95

[UnaClocker]

As for the MAP, the MS guys can just simply tell MS that they have a 3bar map, and poof, it's ready.. Or 4bar..

[R/Tony]

Hey .. got to reactivate this post...


I am using 4bar map sensor (Megasquirt) does anyone have a list of values just like this GM 3bar map but for the 4bar map ?:
GM 3 bar map sensor(-psi means vac)
PSI/Vac Volt
-28.5, 0.078
-27.1, 0.156
-25.7, 0.234
-24.2, 0.313
-22.8, 0.391
-21.4, 0.469
-19.9, 0.547
-18.6, 0.625
-17.1, 0.703
-15.7, 0.781
-14.8, 0.859
-12.9, 0.938
-11.4, 1.016
-10.0, 1.094
-8.60, 1.172
-7.17, 1.25
-5.75, 1.328
-4.33, 1.406
-2.91, 1.484
-1.49, 1.563
-0.06, 1.641
0.670, 1.719
1.370, 1.797
2.060, 1.875
2.760, 1.953
3.460, 2.031
4.160, 2.109
4.860, 2.188
5.560, 2.266
6.250, 2.344
6.950, 2.422
7.650, 2.5
8.350, 2.578
9.050, 2.656
9.750, 2.734
10.40, 2.813
11.10, 2.891
11.80, 2.969
12.50, 3.047
13.20, 3.125
13.90, 3.203
14.60, 3.281
15.30, 3.359
16.00, 3.438
16.70, 3.516
17.40, 3.594
18.10, 3.672
18.80, 3.75
19.50, 3.828
20.20, 3.906
20.90, 3.984
21.60, 4.063
22.30, 4.141
23.00, 4.219
23.70, 4.297
24.40, 4.375
25.10, 4.453
25.80, 4.531
26.50, 4.609
27.20, 4.688
27.90, 4.766
28.60, 4.844
29.00, 4.922
30.00, 5


How can I take the 0 to 5v value from the 4bar map inside my Megasquirt ECU ?

[UnaClocker]

Where are you trying to take them to? You simply tell the MS that it's got a 4 bar and you're golden.

[R/Tony]

Quote:

Originally Posted by UnaClocker Where are you trying to take them to? You simply tell the MS that it's got a 4 bar and you're golden.

I want the Map signal to drive the Water/alky kit... the megasquirt does already know that it has a 4bar map and its reading fine, the problem is the map voltage to activate the spray.

There are just 4 types of progressive controllers from Devilsown, 1bar, 2bar, 3bar, and direct voltage reader, so I could use the last one only If I had the direct voltage reference from Megasquirt, or maybe with an external 4bar map with a 0-5v output.

[87turbodance]

This is useful for me because I would rather just change the code then make hardware changed to MS - that way I can use the MS for a different car without having to worry about ripping out the resistors.

Quote:

Originally Posted by UnaClocker Nah, not really. Just use a 10k bias resistor when assembling the MS, and the stock TD (and Neon) sensors work great. It's even written in the assembly instructions.

[UnaClocker]

Actually, in that case, this thread is still useless for you. The MS doesn't use a voltage table, it uses a resistance table. So you need the resistance numbers for our stock sensors to put into the code. They're listed on the Neons forum in the MegaSquirt section.

[speeduphoria]

Quote:

Originally Posted by R/Tony I want the Map signal to drive the Water/alky kit... the megasquirt does already know that it has a 4bar map and its reading fine, the problem is the map voltage to activate the spray. There are just 4 types of progressive controllers from Devilsown, 1bar, 2bar, 3bar, and direct voltage reader, so I could use the last one only If I had the direct voltage reference from Megasquirt, or maybe with an external 4bar map with a 0-5v output.

IMO you want all the water injection to be max by 30psi anyway so I would just use the 3 bar setup.

I thought MS had something to control meth injection though but not sure