Technical suspect throttle body

[osca123]

Having no throttle response, from pedal suspect throttle body, have code read it. Come up with codes p1121 and p1122, dismantled throttle body cleaned potienmeter and pick ups in throttle body, just would anyone know how to test, input and output voltages, on the six pins, on throttle body.

Thanks ......................

 

[Deckchair5]

Do a search as there's been loads of stuff on this


If you're checking resistance at the TB then it should be a smooth transition as the throttle opens and closes. If you're checking voltage it should move from around 1v to 5v, again smoothly. Two comparison potentiometers in there so they move at different rates for accuracy

But you could well be focussing too much on the TB itself. P1121 and P1122 are saying it's implausible voltages ie the throttle position can't be where it says it is if the MAP is saying that volume of air is entering the engine or, more often, it's even going open circuit. So bad connections between ecu and TB or MAP or the D4 connector would cause similar problems and not just internally at the TB itself. Often it's the connections at the ecu ie nothing wrong with the TB


On some cars it's the gas pedal to ecu connections causing the problem, again through D4

Either way, the ecu thinks "The world's gone mad, this can't be happening" and goes on strike