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blownsensorground [2009/10/20 09:51]
twdorris
blownsensorground [2009/10/20 09:51]
twdorris
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 ====== Blown Sensor Ground ====== ====== Blown Sensor Ground ======
  
-There are two separate grounds as far as the ECU is concerned. ​ There'​s a low-current ground shared by many of the analog sensors in the car and a high-current chassis ground. ​ If you install a high-current device, like a WBO2 kit for example, powered off sensor ground or you short an O2 sensor somehow, you can blow this ground track inside the ECU.  If the track is burned, you need to fix whatever caused it to burn or else after repairing the track, you'll just blow it again or, worse, blow something else in the ECU if your repaired track is stronger than the original.+There are two separate grounds as far as the ECU is concerned. ​ There'​s a low-current ground shared by many of the analog sensors in the car (throttle position sensor, MAF sensor, coolant temperature,​ etc.) and a high-current chassis ground. 
 + 
 +If you install a high-current device, like a WBO2 kit for example, powered off sensor ground or you short an O2 sensor somehow, you can blow this ground track inside the ECU.  If the track is burned, you need to fix whatever caused it to burn or else after repairing the track, you'll just blow it again or, worse, blow something else in the ECU if your repaired track is stronger than the original.
  
 A blown sensor ground trace will be evident in datalogs. ​ It will result in -40F intake and coolant temp readings, 100% TPS, an unusually high Baro reading (like 37 inHg) and O2 voltages greater than 1V.  The car will also most likely not even start. ​ Note that with the V3 application,​ you may see as low as -74F on the intake and coolant temp readings. A blown sensor ground trace will be evident in datalogs. ​ It will result in -40F intake and coolant temp readings, 100% TPS, an unusually high Baro reading (like 37 inHg) and O2 voltages greater than 1V.  The car will also most likely not even start. ​ Note that with the V3 application,​ you may see as low as -74F on the intake and coolant temp readings.
blownsensorground.txt · Last modified: 2009/10/27 13:40 by twdorris