Trottle Position Sensor

[Mick9099]

Hi Guys, I drive a 1999 Silverado 1500, 4x4, ext cab 5.3L. My" Service Engine Soon" light came on so I took it to a mechanic so that he can check the "code" he told me that I had a faulty TPS.

 

I have a Haynes Service Manual 1988-2000 but it does'nt include the 99' and 00' Silverado. Any way I still ran the tests and all the figures came up correct (for the other models) but can anyone with the correct service manual for my tell me if these figures are correct.

 

 

ECM/PCM voltage= approximately 5.0 volts

 

TPS: Fully Closed= approx 6.0volts, Fully Open=approx 4.5volts

[bronyaur]

If what you posted isn't a typo, that closed throttle shows 6.0 volts, then your TPS is faulty. It should be around .6 volts at idle and 4.5 volts at WOT.

 

[Mick9099]

Oh yeah, that is a typo, thanks. d**n to think I would have shelled out all that money for a new TPS. I think I need to get one of those computer thingys that the mechanic uses to find the problem codes, is there one that works with all types of automobiles???

[bronyaur]

As I understand it, yes there is, however with a large caveat. I was told that the government required all car manufacturers to have the same ODB connector and they all complied. However, there was no standard for what wire went to which pin in the connector, and as a result they are all different. Whatever scan tool you use will need a key for the vehicle you have, so it knows how to identify the info. coming from each pin insde the connector. In other words, the scan tool will probably work with any vehicle, but you need a key for that vehicle. Sometimes one key may cover many different years and models from the same manufacturer.