01-26-2018, 04:46 AM
Dave, looking at another video that i did not use the 700 rpm started at 0.80 volts and by 0.925 volts the engine died at 450 rpm.
Question for you; what can cause the tps sensor signal wire ( black/red ) voltage to rise above 0.5 volts if the tps is in the idle position?
The 5 volt supply to all sensors is generated and stabilized by a special circuit within the ecm ( computer ) and will be maintained at 5 volts exactly even at very low or high battery voltage, a sign of the 5 v dropping below operating condition is the meters and fuel pump cycling after and during an engine start, so even a bad battery will result in a stable 5 v supply.
Max: Please verify, but I understood you to think that no further testing, beyond resistance tests, are necessary, which would let us move on to the IACV...which has only one DTC:
Doc, that is a very important question;
The tps voltage/resistance testing was LIKELY NOT TO SHOW A FAULT.
The important thing is to eliminate the tps/wiring fault all together by disconnecting it, only when we determine the fault has disappeared it's time to find the actual cause.
That is why i asked Dave to unplug it and ride for an extended period at least 5 times, starting with post 1 of this thread, after 4 weeks i am still waiting for that moment.
The trick with intermittent faults is to wait until it happens frequently enough to enable to locate the source of it,
waste of time testing something that works fine at the time of testing, you need to catch it when the fault is present.
As you may remember jdvalero fixed his high idle to date by locating 2 "low tps voltage " fault codes and traced it back to a rotated pin inside the tps connector; http://cb1100forum.com/forum/showthread....#pid187614 if you look at post 52 he shows the connector; http://cb1100forum.com/forum/showthread....#pid187944
For tps- idle relation have a look at this video, you can spool to 26 minutes into the video if you don't want the whole thing, the guy with the cap is keith, he is the clever dude with a lot of experience; https://www.youtube.com/watch?v=NWdOASlI0GA
max
Question for you; what can cause the tps sensor signal wire ( black/red ) voltage to rise above 0.5 volts if the tps is in the idle position?
The 5 volt supply to all sensors is generated and stabilized by a special circuit within the ecm ( computer ) and will be maintained at 5 volts exactly even at very low or high battery voltage, a sign of the 5 v dropping below operating condition is the meters and fuel pump cycling after and during an engine start, so even a bad battery will result in a stable 5 v supply.
Max: Please verify, but I understood you to think that no further testing, beyond resistance tests, are necessary, which would let us move on to the IACV...which has only one DTC:
Doc, that is a very important question;
The tps voltage/resistance testing was LIKELY NOT TO SHOW A FAULT.
The important thing is to eliminate the tps/wiring fault all together by disconnecting it, only when we determine the fault has disappeared it's time to find the actual cause.
That is why i asked Dave to unplug it and ride for an extended period at least 5 times, starting with post 1 of this thread, after 4 weeks i am still waiting for that moment.
The trick with intermittent faults is to wait until it happens frequently enough to enable to locate the source of it,
waste of time testing something that works fine at the time of testing, you need to catch it when the fault is present.
As you may remember jdvalero fixed his high idle to date by locating 2 "low tps voltage " fault codes and traced it back to a rotated pin inside the tps connector; http://cb1100forum.com/forum/showthread....#pid187614 if you look at post 52 he shows the connector; http://cb1100forum.com/forum/showthread....#pid187944
For tps- idle relation have a look at this video, you can spool to 26 minutes into the video if you don't want the whole thing, the guy with the cap is keith, he is the clever dude with a lot of experience; https://www.youtube.com/watch?v=NWdOASlI0GA
max