REPLACING THE VSV
Ok, Here is shown how to replace the VSV, Vacuum Switching Valve. This valve generates a persistent CEL, and can cause an excessive fuel consumption. The ODB II error shown is a P0401 – EGR insufficient flow.
In this disassembled intake you could see the VSV. It's hard to see, It's in the intake chamber (seems a jail, each cilinder intake as its rungs) This first photo is from a previous alia176 post:
First is to unplug the vacuum hoses. Replacing them could be a good idea. This guy used fuel 6mm inner diameter hoses.
second thing is to aside the admission support bracket:
This support bracket should be loosen on its base, below the car. It's quite complicated…
You don't need to unbolt it completely. It's just to aside it. Although everything You should have little girl hands, as he does, to work inside the intake chamber.
Once the support bracket is asided, You should loose the EGR vacuum modulator (the green mushroom):
Don't forget to unplug the vacuum hose attached to the VSV. (arrowed in purple) This guy broke down that hose. Arrowed in green is one of the two screws that hold the VSV. Both need a 12mm key. The other screw can be seen inside the chamber, it's too arrowed in green on the next photo.
Arrowed in purple, hard to see, is the VSV. Loose both screws, one from the left side of the intake...
…And one from below the car. It's not difficult to see. (arrowed in purple). You can see too the VSV from below (arrowed in purple). Both screws are hardly screwed and it's easy to pass their heads off...
Not much orthodox, but it makes its function. You can see here how. The VSV electrical plug is arrowed in purple.
Once loosen the VSV, don't forget to unplug the other vacuum hose and the electrical plug.
Detail of this second vacuum hose:
And from the electrical sensor plug:
Once out, unscrew the old VSV and place the new one. Quite simple.
New VSV (Toyota Part code 90910‐12079)
voilá.
Mounting is the reverse. Don't forget any screw, hose or plug.
Excuse this pathetical English. (Again)
Ok, Here is shown how to replace the VSV, Vacuum Switching Valve. This valve generates a persistent CEL, and can cause an excessive fuel consumption. The ODB II error shown is a P0401 – EGR insufficient flow.
In this disassembled intake you could see the VSV. It's hard to see, It's in the intake chamber (seems a jail, each cilinder intake as its rungs) This first photo is from a previous alia176 post:
First is to unplug the vacuum hoses. Replacing them could be a good idea. This guy used fuel 6mm inner diameter hoses.
second thing is to aside the admission support bracket:
This support bracket should be loosen on its base, below the car. It's quite complicated…
You don't need to unbolt it completely. It's just to aside it. Although everything You should have little girl hands, as he does, to work inside the intake chamber.
Once the support bracket is asided, You should loose the EGR vacuum modulator (the green mushroom):
Don't forget to unplug the vacuum hose attached to the VSV. (arrowed in purple) This guy broke down that hose. Arrowed in green is one of the two screws that hold the VSV. Both need a 12mm key. The other screw can be seen inside the chamber, it's too arrowed in green on the next photo.
Arrowed in purple, hard to see, is the VSV. Loose both screws, one from the left side of the intake...
…And one from below the car. It's not difficult to see. (arrowed in purple). You can see too the VSV from below (arrowed in purple). Both screws are hardly screwed and it's easy to pass their heads off...
Not much orthodox, but it makes its function. You can see here how. The VSV electrical plug is arrowed in purple.
Once loosen the VSV, don't forget to unplug the other vacuum hose and the electrical plug.
Detail of this second vacuum hose:
And from the electrical sensor plug:
Once out, unscrew the old VSV and place the new one. Quite simple.
New VSV (Toyota Part code 90910‐12079)
voilá.
Mounting is the reverse. Don't forget any screw, hose or plug.
Excuse this pathetical English. (Again)
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