Brad Clayton Posted November 24, 2011 Share Posted November 24, 2011 An interesting one: Quote Link to comment Share on other sites More sharing options...
GregH Posted November 24, 2011 Share Posted November 24, 2011 Nice writeup. It looks like in the oscilloscope graph that when the fault occurs, the voltage at the fuel delivery module goes to 12v. Was the chaffed wire shorting to power, going open, or shorting to ground? It looks from the picture that it was open circuit. If so, then does the fuel delivery module supply a 12V, low amp signal and the RCM provides a pulse ground? Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted November 24, 2011 Author Share Posted November 24, 2011 Quote: It looks like in the oscilloscope graph that when the fault occurs, the voltage at the fuel delivery module goes to 12v. Was the chaffed wire shorting to power, going open, or shorting to ground?The chafe was creating an open circuitIt looks from the picture that it was open circuit. If so, then does the fuel delivery module supply a 12V, low amp signal and the RCM provides a pulse ground?That is correct on both parts Mighty good deductions there, sir! Your current employer is going to have a hard time filling the void that will be created by your absence! Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted November 24, 2011 Share Posted November 24, 2011 Nice case study. This looks like the case studies that trainers do at national conferences. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted November 25, 2011 Author Share Posted November 25, 2011 Thank you for those kind words. My next one that is in the works is going to be a doozy! Quote Link to comment Share on other sites More sharing options...
Adam_Dodson Posted November 25, 2011 Share Posted November 25, 2011 That is getting to be a common spot. I too have had broken wires there but mine lead to a loss of communication from the PCM to ABS module. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.