Hello mates, got a 4.2 SC as a project for next to nothing. Was not starting, delivered by towtruck. Previous owner thought it was a fuel pump issue which he replaced. He would hold the throttle body open with a screw driver to spray starting fluid in, in turn this was damaged. I replaced the throttle body and it now starts. However when I push on the accelerator nothing happens. I'm getting a few codes

P2105 - throttle actuator control system forced engine shutdown
P2135 - throttle position sensor switch A/B voltage correlation
P0227 - throttle position sensor switch C circuit low
P2123 - throttle position sensor switch D circuit high

I replaced the accelerator pedal assembly with a used unit- made no difference (does anyone have a wiring diagram for the 6 pins?)

I checked some numbers
Relative throttle position 5.9%
Absolute throttle position 16.9%
Commanded throttle actuator control 20%
Absolute throttle position B 33.7%
Absolute throttle position D 0%
Absolute throttle position E 100%

Thanks for the advices

Cant find a proper dia but have this



If 1 of the tracks is not working it will go in to limp mode and only allow 2000rpm.

J

My accelerator pedal has 6 pins, 2 rows of 3. Any way to test it to make sure both my original and used replacement are not faulty. There is no response to the pedal.

Thanks

Ok the tracks are easy to test if you can confim which pin is which.

Do you have 5v supply at the plug (should be 2, 1 for each track)?
You should be able to locate the 2 earth pins in the plug. This then leaves you with 2 others which will be the return to the ecm of demand from the tracks.
then you know which pin in the plug does what and then you know which pin is which on the throttle pedal module plug, yes.

Then check the resistance of the tracks 1 should lower than the other.
Also check the wiring from the plug back to the ECM for corrosion/breakage.

Found this diagram from a 2005 V8 not sure its for the SC though.

Also looking at your codes you may well have a problem not related to the throttle pedal, but it needs to be ruled out first.

And the last 1 may match the wiring colours to function to help, but confirm these as I cant say its SC specific.

Oh BTW all this info has come from manuals I have that were all sourced free of the internet.

HTH.

J