started testing the TPS using the guidelines provided here: http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

but i am getting an open circuit (1) on the first test with the throttle all the way closed ... the ohm meter gives a reading for a split second (varying between 70 to 150 ohms) and then just shows 1 ... here is the settings i am using on the ohm meter (it's set at 200):


when i change to a different setting such as 2k or 20k i get decimal read outs such as .534, i believe that 200 is the right reading range since i am looking for a ohm reading of 200-800 for the first test

so since i am not getting a steady reading, is my TPS completely bad? i'm getting diagnostic code 51
do i need a new one or can this one be serviced?

thanks

 

4crawler wrote:

On the 200 setting, you meter can only measure up to 200 (or 199.9) ohms and anything higher is displayed as an open circuit. You want to use a range that is higher than the expected resistance you are measuring:
- http://www.4crawler.com/4x4/CheapTri...oUseAnOhmMeter

Since you are looking for a resistance in the range of 200-800 ohms, that is likely more than 200 ohms, so use the next higher scale.