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Bosch MAP Sensor NTC

Here you can ask technical questions about UTCOMP-3 / UTCOMP-PRO compatibility and features.
snaxxi
Posts: 2
Joined: Sun Jun 16, 2019 9:26 pm

Bosch MAP Sensor NTC

Postby snaxxi » Sun Jun 16, 2019 9:51 pm

Hi,

i have an UTCOMP-PRO and wanted to connect my MAP sensor. I'm using a 400 kPa Bosch Sensor with 4 Pins (Part No. 0 281 002 576). Boost signal works fine but i also want to use the NTC resistor for intake temperature.

I'm not sure if i have to connect it to AdcX (0-5V) or 0 AdcVccX (0-5V, +5V PULL-UP) since the sensor is already powered with 5V since i just split the cable (one from car harness and one for UTCOMP). Also i'm not sure about the configuration and set the following based on bosch documents:

url: http://360.haubits.net/VolvoRacing.se/Sensors.pdf
Resistance: 2,5kO
Temperature: 293,15K (20°C)

With this configuration and connection to AdcX (0-5V) i get ridiculous values.

I hope you guys can help me out.

ArT
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Location: Warsaw, Poland
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Re: Bosch MAP Sensor NTC

Postby ArT » Mon Jun 17, 2019 2:26 pm

You should connect to AdcX but you will need to get voltage (NOT resistance) table, so you will need to connect with diagnostic tool and make table temperature/voltage and scale with this table

snaxxi
Posts: 2
Joined: Sun Jun 16, 2019 9:26 pm

Re: Bosch MAP Sensor NTC

Postby snaxxi » Mon Jun 17, 2019 4:20 pm

Thank's for your answer. So the connection is right at least.
So i have to get the voltage/temperature table and calculate the needed values for UTCOMP configuration from there?
Can you provide me a link how to calculate those values?

ArT
Posts: 834
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Re: Bosch MAP Sensor NTC

Postby ArT » Tue Jun 18, 2019 9:37 am

You have ready to use excel in this thread:
viewtopic.php?f=28&t=58 (use NTC(U) sheet).
Please feel free to ask if you will have any further questions :)


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