There are alot of posts about using the scan tool to troubleshoot the multiple sensors used on the fuel injection system on harley davidson motorcycles, but information on the actual signals that these sensors supply is very hard to find. For instance the MAP sensor has a 5 volt supply, and being an absolute pressure sensor, does this sensor supply a 5 volt or 1 volt signal with the switch on, engine off? What is the output for the output for the TPS? I know these are easy to verify on at a shop or with a digital scanner, but for those of us without immediate access to these tools, this would be very helpful information.

 

Map = 4.7v@100 KPA, .4v@0 KPA
TPS = .4v@closed throttle/idle, 4.7v@wide open throttle.