what will this do ?

[seans VL Calais]

yesterday i was replacing my antenna whe i found my computer on the passenger side behind the little guard that i neede to get behind to take the outside panel off. anyway i noticed a little switch (that to reach you have to use a screwdriver) on the front and it had high and low it was sitting just over half way to high.. what will it do if i turn it up or down ?? thanks in advanced

[SMIT]

not 100% sure maybe idle control, best not to touch it if you dont know what your doing and your car is working.

[14secvp]

its the idle speed and it turns the diagnostics on too dont turn it hard

[Sabbath']

Its used for putting the car in and out of Diagnostics mode, where you can find out the "Fault Codes" by reading the two LED's also contained on the fascia of the unit. It can also be used to make subtle adjustments to the idle speed i believe as there are other places where idle speed can be adjusted from. But should only be adjusted if it is out (Should be around 700+- 50)

As has been said, do not force it or turn it hard. If you have a Gregories/Haines/Ellery manual there should be a chapter in there with reference to the computer and the fault codes and such.

[14secvp]

TO CHECK ERROR CODES:
1. remove screw retaining the passenger side kick panel
2. turn the diagnostic mode selector fully clockwise to diagnostic
3. start the engine and let it idle
4. watch the LED's flash (red and green), the red represents tens and the green represents ones (so if the red flashes twice and the green 4 times, thats 24). 14, 23, 24, and 31 should show
5. drive the car above 10km/h, this will cancel code 14
6. stop the motor and then turn the ignition to the on position
7. press the accelerator, this will cancel 23
8. put the car in neutral, then back into another gear, then back to neutral. this will cancel 24
9. turn the air con on, then off this will cancel 31
10. look at the codes that are now displayed, 31 means you dont have air con or its not working and 44 means your air con is working.
11. any other codes displayed besides this means there is a fault in that section
12. turn the diagnostic mode selector back full anticlockwise then turn the ignition off.
13. erase the memory by turning the ignition on, then moving the diagnostic mode selector fully clockwise for 2 seconds, then fully anticlockwise for 2 seconds. turn the key off and the memory is now cleared

CODES ARE:
11 Crank angle sensor circuit
12 Air flow meter circuit
13 coolant temperature sensor circuit
14 Vehicle speed sensor circuit
21 ignition signal circuit
23 throttle switch circuit
24 neutral switch circuit
31 satisfactory operation (non air conditioned models) air conditioner circuit (air conditioned models)
32 starter signal circuit
34 detonation sensor circuit (turbo models)
44 satisfactory operation (air conditioned models)
__________________

[seans VL Calais]

ok thanks guys i recon ill just leave it alone then lol

[harry3]

water leaking in thru a rusted wind screen surround can damage the computer, some recommend placing a plastic bag over it

[rb26dett]

water leaking in thru a rusted wind screen surround can damage the computer, some recommend placing a plastic bag over it

It would need to be very tight, or it will gather moisture inside of it.