Compound Turbo Truck Down :(
10-25-2017, 06:00 AM
#11
With KOEO (key on engine off) can you clear the code(s)? If they clear, cycle the throttle with KOEO. If they do not clear, unplug the harness as it goes into the X-Link. Plug in your original throttle body (or a known good one) and do the same test.
It looks like you tried that above, I just wanted to make sure.
It looks like you tried that above, I just wanted to make sure.
10-25-2017, 11:39 AM
#13
I have logged Pedal Position vs Throttle Body Position. With Key On Engine Off (since the truck wont stay running): 1) the pedal position % reads as it should but Throttle Body Position does not change (except for some throttle body 'fluttering' I mentioned earlier that goes away after a few seconds. 2) Moving the throttle body through its range of motion with my hand, throttle body position (TPS) reads as it should.
10-25-2017, 11:44 AM
#14
Clear out some space in your scanner and add everything throttle related, particularly any channels that distinguish position sensor A from position sensor B. Look at raw voltages, not percentages as they will be filtered values. Plot them both on the same graph and look for incongruity in the voltage output from the sensors. Something is tripping up the throttle position rationality diagnostic.
10-25-2017, 11:51 AM
#15
While we're talking about pedal assemblies, what year truck is this pedal assembly out of? Anybody recognize it? It's said to be out of a 2003 Silverado, however it doesn't look exactly like the stock pedal assembly in my 03 Sierra.
10-25-2017, 11:51 AM
#16
Clear out some space in your scanner and add everything throttle related, particularly any channels that distinguish position sensor A from position sensor B. Look at raw voltages, not percentages as they will be filtered values. Plot them both on the same graph and look for incongruity in the voltage output from the sensors. Something is tripping up the throttle position rationality diagnostic.
