Friday, September 24, 2021

Bosch TMAP ( P/N: 0 261 230 044 ) pinouts

Because I couldn't find particularly good information on this sensor I went down a few wrong paths while troubleshooting an issue that I was having with it. For that reason, I'm making this post so that FutureMe will have this information that PresentMe is sure to forget in very short order.

If you find this information useful, GREAT! But also know that it not derived from any official sources so your mileage may vary and I'm not responsible if you break your sensor, your car, or burn your house down while trying to get your TMAP sensor working.



Temperature Calibration Table

This calibration table is for the Bosch NTC type thermistor. These values seem to be accurate for this sensor but are not taken directly from any form of documentation regarding this specific part number because I can't find documentation about this specific part number.

Bosch NTC
OhmsOutput V
45,3134.89
26,1144.82
15,4624.70
9,3974.52
5,8964.27
3,7923.96
2,5003.57
20573.36
1,7073.15
1,1752.70
8342.27
5961.87
4361.52
3231.22
2430.98
1870.79
1440.63
1130.51
890.41

Pressure Calibration

This pressure calibration is a wild-ass guess. Don't use.  If I find more information I'll add it. (This assumes that this is a 4-bar MAP, which I don't think it is.  I think it's probaby a 1-2 bar MAP sensor but I haven't been able to confirm that yet.)

Pressure
V outBarPSI
0.38600
4.5458

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