Vehicle & Technical > Suzuki

WANTED: Vitara throttle position sensor

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Evilgoat:
Ok you SHOULD have 6 pins with the following colour wires attached (like these ever match)
Grey + yellow stripe is one end of the track
Grey + red is the tother

Should be a constant resistance beween these two

Grey is the wiper and should vary between the two wires above
Blue is defined here as not used/ISV valve (Idle Stabiliser)
Green + black  is defined here as Not/Used /WOT Switch (Wide open throttle)
Remaining wire (blue+red) is the idle switch

StuartL:
The TPS reads very low (0.1 ohms) at idle (sprung return) and infinite at fully open, which is all the Haynes suggests you check.  However it's not varying the resistance proportionally within that movement and seems to become infinite resistance at about 30 degrees.  Different DVM ohm meter ranges don't seem to make a difference.

I can't see that this behaviour is correct and the injector isn't firing so the TPS seems a prime candidate to replace.  Can you think of any other reasons for the injector not to fire?  There's some voltage at times on the injector wires but it's too brief for my DVM to get a fix on.  I need an oscilloscope!

Edit: I have a carb 8v and an injected 8v literally side by side by my house.  If you want to compare the two you'd be very welcome :)

Evilgoat:

--- Quote from: "StuartL" ---
I can't see that this behaviour is correct and the injector isn't firing so the TPS seems a prime candidate to replace.  Can you think of any other reasons for the injector not to fire?  There's some voltage at times on the injector wires but it's too brief for my DVM to get a fix on.  I need an oscilloscope!

Edit: I have a carb 8v and an injected 8v literally side by side by my house.  If you want to compare the two you'd be very welcome :)
--- End quote ---


Sounds like you have the idle switch :) Haynes manual isnt great on this tbh I would use the pins above to meter it out. If all else fails I di have a scope sat in the cupbard yet waiting for me to do a refurb which you are welcome to borrow, not sure how well it works though. Add me on your msn

StuartL:
My TPS has four wires (pink, beige, turquoise and black) that go to four pins on a six pin connector block.  The other two pins go off to the injector and the other side of the block disappears into the loom.

The colours on the other side of the block aren't the same as your book either with most of them being multicoloured...

Will signal hunt and see if I can find a proportional signal somewhere...

StuartL:
[!Expletive Deleted!].

Found a proportional signal varying between 500 ohms and 1.5k ohms (for my limited test range).  It's not the TPS.  Scratch that idea.

Maybe the injector itself is [!Expletive Deleted!]?

I'd give my left arm for an oscilloscope.

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