voltage range of the ecu sensors????
May 23, 2005, 09:25 PM
#1
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voltage range of the ecu sensors????
i need some help guys......
i need to know the voltage range for the following sensors:
pin #72 Intake Air Temp Sensor signal
i found this but it is the resistance values
13-17 kohm [at-4f]
5.3-6.7 kohm [32f]
2.3-3 kohm [68f]
1.0-1.5 kohm [104f]
.56-.76 kohm [140f]
.30-.42 kohm [176f]
i need to know what voltage between 0-5 volts = temp
i also need to know
MAP pin # 73
coolent temp pin# 83
and Throttle postion Sensor Voltage pin #84
i checked the evo8 manual and everything is listed as ohms = temp
please help!!!!
i need to know the voltage range for the following sensors:
pin #72 Intake Air Temp Sensor signal
i found this but it is the resistance values
13-17 kohm [at-4f]
5.3-6.7 kohm [32f]
2.3-3 kohm [68f]
1.0-1.5 kohm [104f]
.56-.76 kohm [140f]
.30-.42 kohm [176f]
i need to know what voltage between 0-5 volts = temp
i also need to know
MAP pin # 73
coolent temp pin# 83
and Throttle postion Sensor Voltage pin #84
i checked the evo8 manual and everything is listed as ohms = temp
please help!!!!
May 24, 2005, 05:38 AM
#2
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Coolant Temp cal is as follows below in F. Hope it helps.
217 = 0 volts
207 = .16 volts
196 = .31 volts
185 = .47 volts
174 = .62 volts
163 = .78 volts
154 = .94 volts
145 = 1.09 volts
136 = 1.25 volts
127 = 1.40 volts
118 = 1.56 volts
109 = 1.72 volts
102 = 1.87 volts
93 = 2.03 volts
86 = 2.18 volts
79 = 2.34 volts
73 = 2.5 volts
66 = 2.65 volts
61 = 2.81 volts
54 = 2.96 volts
48 = 3.12 volts
43 = 3.28 volts
37 = 3.43 volts
34 = 3.59 volts
28 = 3.74 volts
25 = 3.90 volts
21 = 4.06 volts
18 = 4.21 volts
14 = 4.37 volts
12 = 4.52 volts
9 = 4.68 volts
7 = 4.84 volts
5 = 4.99 volts
217 = 0 volts
207 = .16 volts
196 = .31 volts
185 = .47 volts
174 = .62 volts
163 = .78 volts
154 = .94 volts
145 = 1.09 volts
136 = 1.25 volts
127 = 1.40 volts
118 = 1.56 volts
109 = 1.72 volts
102 = 1.87 volts
93 = 2.03 volts
86 = 2.18 volts
79 = 2.34 volts
73 = 2.5 volts
66 = 2.65 volts
61 = 2.81 volts
54 = 2.96 volts
48 = 3.12 volts
43 = 3.28 volts
37 = 3.43 volts
34 = 3.59 volts
28 = 3.74 volts
25 = 3.90 volts
21 = 4.06 volts
18 = 4.21 volts
14 = 4.37 volts
12 = 4.52 volts
9 = 4.68 volts
7 = 4.84 volts
5 = 4.99 volts
May 24, 2005, 05:45 AM
#3
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Maf Air Intake Temp Sensor Cal Table is below in F. Hope it helps.
261 = 0.16 volts
226 = 0.31 volts
199 = 0.47 volts
180 = 0.62 volts
163 = 0.78 volts
153 = 0.94 volts
144 = 1.09 volts
136 = 1.25 volts
129 = 1.40 volts
124 = 1.56 volts
118 = 1.72 volts
113 = 1.87 volts
109 = 2.03 volts
102 = 2.18 volts
97 = 2.34 volts
91 = 2.50 volts
84 = 2.65 volts
77 = 2.81 volts
72 = 2.96 volts
64 = 3.12 volts
59 = 3.28 volts
54 = 3.43 volts
48 = 3.59 volts
43 = 3.74 volts
37 = 3.90 volts
32 = 4.06 volts
25 = 4.21 volts
18 = 4.37 volts
5 = 4.52 volts
-9 = 4.68 volts
-29 = 4.84 volts
-58 = 4.99 volts
261 = 0.16 volts
226 = 0.31 volts
199 = 0.47 volts
180 = 0.62 volts
163 = 0.78 volts
153 = 0.94 volts
144 = 1.09 volts
136 = 1.25 volts
129 = 1.40 volts
124 = 1.56 volts
118 = 1.72 volts
113 = 1.87 volts
109 = 2.03 volts
102 = 2.18 volts
97 = 2.34 volts
91 = 2.50 volts
84 = 2.65 volts
77 = 2.81 volts
72 = 2.96 volts
64 = 3.12 volts
59 = 3.28 volts
54 = 3.43 volts
48 = 3.59 volts
43 = 3.74 volts
37 = 3.90 volts
32 = 4.06 volts
25 = 4.21 volts
18 = 4.37 volts
5 = 4.52 volts
-9 = 4.68 volts
-29 = 4.84 volts
-58 = 4.99 volts
May 24, 2005, 05:47 AM
#4
Damn, I was just recently looking for this info... LOL
In reality, you could have figured it out from the Ohm value.. they gave you the impedence for the temps, and you know the voltage source is +5v so if the sensor is linear, you could have interpolated the values between the low and high points.
I don't recall the formula offhand but it can be calculated based on the impedence value.
In reality, you could have figured it out from the Ohm value.. they gave you the impedence for the temps, and you know the voltage source is +5v so if the sensor is linear, you could have interpolated the values between the low and high points.
I don't recall the formula offhand but it can be calculated based on the impedence value.
Last edited by MalibuJack; May 24, 2005 at 05:51 AM.
May 24, 2005, 07:14 AM
#5
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Originally Posted by MalibuJack
In reality, you could have figured it out from the Ohm value.. they gave you the impedence for the temps, and you know the voltage source is +5v so if the sensor is linear, you could have interpolated the values between the low and high points.
I don't recall the formula offhand but it can be calculated based on the impedence value.
I don't recall the formula offhand but it can be calculated based on the impedence value.
+5V --^v^v Rp ^v^v -- Vs -- ^v^v Rs ^v^v -- GND
where Rp is a pull-up resistor (the ^v^v is supposed to look like a resistor symbol), Vs is the sensor voltage, and Rs is the variable sensor resistance. The pull-up is necessary to limit the current. From the values posted it looks like Rp is 1k.
The current, I, is 5 / (Rs + Rp), so Vs is I * Rs, or Vs = 5 * Rs / (Rs + 1k)
Dave
May 24, 2005, 07:44 AM
#7
Originally Posted by djh
You need a little more information. The circuit probably looks like this:
+5V --^v^v Rp ^v^v -- Vs -- ^v^v Rs ^v^v -- GND
where Rp is a pull-up resistor (the ^v^v is supposed to look like a resistor symbol), Vs is the sensor voltage, and Rs is the variable sensor resistance. The pull-up is necessary to limit the current. From the values posted it looks like Rp is 1k.
The current, I, is 5 / (Rs + Rp), so Vs is I * Rs, or Vs = 5 * Rs / (Rs + 1k)
Dave
+5V --^v^v Rp ^v^v -- Vs -- ^v^v Rs ^v^v -- GND
where Rp is a pull-up resistor (the ^v^v is supposed to look like a resistor symbol), Vs is the sensor voltage, and Rs is the variable sensor resistance. The pull-up is necessary to limit the current. From the values posted it looks like Rp is 1k.
The current, I, is 5 / (Rs + Rp), so Vs is I * Rs, or Vs = 5 * Rs / (Rs + 1k)
Dave
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May 24, 2005, 08:15 AM
#8
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you guys rock
.....i will try the values when i get home....thank you very much.....
anyone know the MAP and TPS values?????
this is what i need to know for MAP( for Boost), TPS,IAT,Coolent temp
0v= ?
.5= ?
1.0=?
1.5=?
2.0=?
2.5=?
3.0=?
3.5=?
4.0=?
4.5=?
5.0=?
.....i will try the values when i get home....thank you very much.....anyone know the MAP and TPS values?????
this is what i need to know for MAP( for Boost), TPS,IAT,Coolent temp
0v= ?
.5= ?
1.0=?
1.5=?
2.0=?
2.5=?
3.0=?
3.5=?
4.0=?
4.5=?
5.0=?
Last edited by djmikeymike; May 24, 2005 at 08:26 AM.
May 24, 2005, 10:18 AM
#9
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TPS is linear I have listed my Max and Min values for my car but usually each car is just a little bit different.
As for the stock map sensor, I have honestly no clue. I didn't even try it before I took it off. I am sure it is a linear sensor as well though with a Min and Max value. Getting those values would be the hard part. I can probably get them for you this weekend if they don't get posted for you. I will be tuning a car with the Stock MAF and I will try to grab those values for you so I will let you know if I have any luck.
Min is 0.66 volts I believe 100% throttle.
Max is 4.88 volts I believe 0-1% throttle.
Also I could have the voltage for Min and Max backwards I will double check on this as well.
As for the stock map sensor, I have honestly no clue. I didn't even try it before I took it off. I am sure it is a linear sensor as well though with a Min and Max value. Getting those values would be the hard part. I can probably get them for you this weekend if they don't get posted for you. I will be tuning a car with the Stock MAF and I will try to grab those values for you so I will let you know if I have any luck.
Min is 0.66 volts I believe 100% throttle.
Max is 4.88 volts I believe 0-1% throttle.
Also I could have the voltage for Min and Max backwards I will double check on this as well.
Jul 22, 2005, 02:20 PM
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What I meant is my Coolant voltage starts at around 2.02 volts and reaches 2.18 volts at the end of 3rd gear. I think I need to reverse my voltage settings so it goes down instead of up.
My AIT is the same way.. starts at 0.59 volts and reaches 0.71 volts at the end of 3rd gear.
I think I'm going to give in and get some GOOD software and log via ODBII.
My AIT is the same way.. starts at 0.59 volts and reaches 0.71 volts at the end of 3rd gear.
I think I'm going to give in and get some GOOD software and log via ODBII.
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