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Re: Update Archived Message Posted by Mark Carter on October 4, 2008, 9:28 am, in reply to "Re: Update" Hi, Peter one way that the ECU works out the correlation is as follows. The ECU receives both voltages from the TPS(track one and two)and it then uses a simple formula to check them for plausability(correlation) The formula is V1 divided by V2 = 2 V1 = track one V2 = track two e.g V1=3 V2=1.5 therefore 3 divided by 1.5 = 2 V1=1.76 V2=.88 = 2 V1=4.22 V2=2.11 = 2 All the time that the ECU comes up with the answer of TWO it is quite happy, it is when the answer is not TWO that the fault codes start appearing. The best way to test the system is with a scope using two channels and trigger it so that you can compare both traces over the total voltage range. You can then do the same maths as the ECU and find the fault.HTH Regards Mark. Message Thread: Ford Fiesta 1.25 2005 - Fault code P2135 Throttle position sensor - Peter Warman September 26, 2008, 2:34 pm Re: Ford Fiesta 1.25 2005 - Fault code P2135 Throttle position sensor - Kevin Apps September 26, 2008, 8:53 pm Re: Ford Fiesta 1.25 2005 - Fault code P2135 Throttle position sensor - lee mackintosh September 26, 2008, 9:01 pm Re: Ford Fiesta 1.25 2005 - Fault code P2135 Throttle position sensor - Bryan Smith September 27, 2008, 3:16 pm Update - Peter Warman October 2, 2008, 1:36 pm Re: Update - Tony Ludford October 2, 2008, 5:23 pm Re: Update - Darren Bamford October 2, 2008, 5:54 pm Re: Update - Matt Elliott October 2, 2008, 7:03 pm Re: Update - Peter Warman October 2, 2008, 8:07 pm Re: Update - Tony Sefton October 3, 2008, 7:59 am Re: Update - Shaun Dale October 3, 2008, 8:10 am Re: Update - Kevin Apps October 3, 2008, 9:16 pm Re: Update - Darren Bamford October 3, 2008, 10:58 pm Re: Update - Michael Whitworth October 4, 2008, 7:48 am Re: Update - Mark Carter October 4, 2008, 9:28 am Re: Update - Darren Bamford October 4, 2008, 10:19 am Re: Update - Peter Warman October 4, 2008, 1:33 pm Re: Update - Mark Carter October 4, 2008, 4:07 pm Re: Update - Tony Sefton October 4, 2008, 5:33 pm Re: Update - Mark Carter October 4, 2008, 6:07 pm Re: Update - Tony Sefton October 4, 2008, 7:38 pm Re: Update - mark carter October 4, 2008, 8:16 pm Fixed - Peter Warman October 7, 2008, 5:05 pm Re: Fixed - Mark Carter October 7, 2008, 5:18 pm

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