SPQ13 TRACY

     Finished up the test light boards involving relays that have either open, VD, or short (ground or power).  A couple of the relays were 'bad', but the book that accompanies the lightboards gives us instructions from 'the boss' to confirm why the relays were bad.



     Discovered this week that the coil will have a specific amount of resistance - really only useful in the real world to confirm a suspicion - and that diodes serve as a current checkvalve.  They only let current flow one way.  This is due to a diode being made up of two different materials - namely the anode and the cathode.  Both materials have a different number of electrons in the outer ring of their atomic structure.  This means that one is more readily accepting of the movement of electrons.  In other words, current flow.

     
     By isolating the diode and testing with my DMM set to the diode test setting, I was able to test the voltage drop between the two.  With the leads hooked up one way the reading read OL, while switching the leads read a specific reading to that diode.  Looks like Jeff had hooked up a OΩ resistor to the back that simulated a short to ground on one of the boards.  This blew the fuse on the control side of the circuit.

     Here is a snapshot of one of the teeth on Alex's Cam Position Sensor.  The vertical lines of the pulse width should be vertical.  Caused the computer to not be sure when timing was exactly, which caused a misfire and a code.

Hours:
Week: 40
Total: 80