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Fuel tank sensor calibration

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Mesaj 10 Sep 2008, 00:34
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Membru PREMIUM Club Calibra
Membru PREMIUM Club Calibra

Mesaje: 337
Motor: C20NE - 8V, OHC, 115 CP
The fuel tank level sensors fitted to Cavaliers, Calibras etc are all slightly different to each other and so the fuel computer must be able to take account of this. In Vauxhall's TIS software, there's a procedure for calibrating this sensor on the car. it's only possible to do it on the car, so please don't ask me to correct it on your module when I programme it here. ;-)

I've read the TIS instructions and they are (at best) pretty difficult to understand, so here's my version:

What you'll need:

* Half a paperclip (or a short piece of wire)
* 120 Ohm resistor

There are two procedures, this is the most accurate:

1. Working under the car, remove the plug from the fuel tank level sender on the fuel tank.
2. Push the resistor pins into the plug contact holes (on the loom end, not the tank).
3. Working under the bonnet, remove the 10-pin diagnostic connector from it's splash shield.
4. Plug the paperclip into the diagnostic connector between pins A and D.
5. Switch the ignition ON.
6. The fuel computer display has now changed, it should read "d : 1" in the lower display.
7. Press the large Fuel Computer control button repeatedly until this display shows "d : 5"
8. Press in the 'minutes adjustment' key using a pen.
9. The display will change to show " 12L " in the top half and " A " in the bottom half.
10. Press the large control button again.
11. The top half of the display changes again, to show "120 ", which is the value of the resistor you need.
12. Press the raised control key to start the calibration.
13. The display then shows "- - - -" in the top half until calibration is complete.
14. When complete, the top half of the display shows the range remaining (with the resistor connected).
15. Working under the bonnet, remove the paperclip from the diagnostic connector.
16. Switch OFF the ignition.
17. Working under the car, unplug the resistor from the fuel tank sender loom.
18. Plug the fuel tank sender loom back into the tank sender.

That's it, you're done.



Here's the approximate method for those of you that are too tight to go and buy a resistor for 6 pence ;-)

1. Drive round until the fuel gauge reads very slightly above the top of the red.
2. Working under the bonnet, remove the 10-pin diagnostic connector from it's splash shield.
3. Plug the paperclip into the diagnostic connector between pins A and D.
4. Switch the ignition ON.
5. The fuel computer display has now changed, it should read "d : 1" in the lower display.
6. Press the large Fuel Computer control button repeatedly until this display shows "d : 5"
7. Press in the 'minutes adjustment' key using a pen.
8. The display will change to show " 12L " in the top half and " A " in the bottom half.
9. Press the raised control key to start the calibration.
10. The display then shows "- - - -" in the top half until calibration is complete.
11. When complete, the top half of the display shows the range remaining (with the resistor connected).
12. Working under the bonnet, remove the paperclip from the diagnostic connector.
13. Switch OFF the ignition.

It really is worth getting a resistor and doing this properly. The range function is only as useful as its calibration and one day you might need to be sure how much fuel you have remaining in your tank. Remember that after a reset, the fuel computer uses a figure of 28.1 miles per gallon for a while until it has measured your driving style and adapted.
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mecomex Membru Activ Club Calibra
Membru Activ Club Calibra

Mesaje: 87
Motor: C20NE - 8V, OHC, 115 CP
buna asta, multumim!

cum da caldura ma duc sa iau o rezistenta si va spun ce-am reusit. mie cu 90km de facut/calculator mi se aprinde becul:))

a mai reusit cineva?

bafta!

H-O-T Avatar utilizator
Membru Activ Club Calibra
Membru Activ Club Calibra

Mesaje: 147
Motor: C20NE - 8V, OHC, 115 CP
Localitate: Cluj-Napoca
are cineva si in romana tutorialul acesta? ca nu am inteles chiar tot si im impresia ca nu am priceput chestile importante .
calibrarea aceasta iti regleaza si acul din bord ( mie cand mai am in rezervor 10-12 litri imi sta acul pe rosu si cred ca la vreo 9 litri se aprinde becul) sau numai km pana la pompa de pe BC
mersi
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