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Output Driver what exactly does it mean
Posted: Thu Dec 15, 2016 10:03 pm
by MKMike
I was checking some things on my 2000 SSEi with a Tech 2 and saw that I can view Output Driver data, so I did.
The Fuel Pump Speed Control kept toggling between OK and Fault.
Does this indicate that the issue is with the ECM or can it be a problem anywhere in the fuel pump speed control circuit?
Re: Output Driver what exactly does it mean
Posted: Thu Dec 15, 2016 10:10 pm
by 96 SSEi
here is the manual for tech 2 maybe info is in there
..............
http://www.auto-diagnostics.info/pdf/te ... _guide.pdf
Re: Output Driver what exactly does it mean
Posted: Fri Dec 16, 2016 11:20 am
by MKMike
Thanks for the manual.
Unfortunately, there's no info on the Output Drivers there.
Re: Output Driver what exactly does it mean
Posted: Fri Dec 16, 2016 4:46 pm
by 96 SSEi
if there is no driveability issue, I would first scan another 2000 SsEi and compare the readings. no sense going into diagnostic mode without a true issue with the ride.
Re: Output Driver what exactly does it mean
Posted: Fri Dec 16, 2016 10:00 pm
by MKMike
There is a definite driveability issue.
What I'm trying to determine is whether the Output Driver Data Fault means that there is definitely a problem in the PCM/ECM or if the problems could lie entirely elsewhere in the fuel pump speed control circuit.
Re: Output Driver what exactly does it mean
Posted: Sat Dec 17, 2016 5:54 am
by michtom
I don't know what is normal data on a tech2 but I wonder if you might have a fuel pump relay that is on it's way out. With the car running measure the current on the control (ground) circuit of fuel pump relay for a couple of minutes. It should be less than an amp. if it is over an amp replacing the relay is a good idea.
Re: Output Driver what exactly does it mean
Posted: Sat Dec 17, 2016 6:22 pm
by MKMike
Thanks Michtom.
I suspect a problem with the "unique to 2000 Bonneville" Fuel Pump Speed Control module, due towater leaks that could have shorted it out at some point in time.
I have a FPSC module from Harofreak00 and will install it on a warmer day, so I'll have my answer soon.
What I've been wondering is whether the PCM/ECM actually diagnoses itself and tells you there's a PCM/ECM issue via Output Driver Data info
OR
if the ODD is like the trouble codes- not pinpointing a problem but giving you an area to examine.
I now have it from a reliable source that it is not pinpointing a trouble with the ECM but simply indicates that there's trouble in the FPSC circuit.
Appreciate the replies, guys and I'll update after I fix the trouble.