Exhaust Temperature Sensor P/N 3862500 Test

[PcolaBeach]

Good afternoon. For the subject temperature sensor, I'm looking for information on expected Hot & Cold resistance (ohms) data. I'd like to be able to test these via an objective VOM measurement. If these sensors are simply on/off switches, please let me know. Thanks all!

The engine information:
Volvo Penta 5.7 GXi-C Raw Water Cooled
Serial Number 4012062213
Production Number 3869137
MEFI Assembly Number 57IAFM/02HT01 3861773
Boat - 2002 Cobalt 240

 

[PcolaBeach]

I can confirm the subject sensors are pull up type switches. They are normally open. The sensors that had been installed were the wrong type giving a resistance of ~1700 ohms cold and ~600 ohms hot. For this model engine, the wrong exhaust temperature sensors were triggering a false alarm at 3500 as the ECM was seeing a sensor voltage of 0.4v. Now that the proper sensors have been installed, the ECM continues to read a sensor voltage of 5.0v.