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[ronnyd]

I,m looking at my owners handbook at the moment Terry and every time cruise is mentioned there is an asterisk denoting that it is/was an option when new. Are you sure that you ain,t looking for something that isn,t there? 

[Doctor Gollum]

It wouldn't have a cruise stalk or clutch switch... Handbook clearly shows light stalk without cruise buttons.

The cruise switch comprises of three switches...

Top nearest driver is the activate/accelerate.
Bottom nearest driver is the resume/decelerate
Furthest from the drive (the single thin button) is Off

If the off switch is sticky, then it could be that it isn't allowing the cruise to activate. Do all three switches operate cleanly and completely?

Also it won't activate until the brake is pressed.

Incidentally hb says to start the car in neutral with both clutch AND brake pedals pressed.

If you press both pedals THEN turn the ignition on, does the light illuminate?

[Doctor Gollum]

Also, re your codes, P0597 is a thermostat code and the P0014 relates to the variable valve solenoids... and resolved by removing the gauze filters as per the 1.8 Astra

[terry paget]

It wouldn't have a cruise stalk or clutch switch... Handbook clearly shows light stalk without cruise buttons.

The cruise switch comprises of three switches...

Top nearest driver is the activate/accelerate.
Bottom nearest driver is the resume/decelerate
Furthest from the drive (the single thin button) is Off

If the off switch is sticky, then it could be that it isn't allowing the cruise to activate. Do all three switches operate cleanly and completely?

The top and bottom switches nearest the driver ar in fact a rocker switch. The slim off switch at the back of the arm seems free enough. Havng pushed it in and had it spring out a few times I turned on the ignition, but the cruise symbol did not appear left of the fuel gauge.

[Doctor Gollum]

Have added to that post

Report back

[terry paget]

I depressed clutch and brake pedals, then switched on ignition, cruise symbol did not appear to the left of the fuel gauge.

[Doctor Gollum]

In that case I would arrange a trip to TB or KW for a Tech2 session to investigate and programme your new key(s) 

[TheBoy]

New Vx clutch switch arrived today, and fitted. No change though, cruise still inoperative. Went through 5 engine start stop cycles, no change. The cruise symbol does not appear left of fuel gauge on ign. switch on, and in short test run at 40mph cruise would not engage.

Put it back on diagnoser. Same fault codes. I cancelled them, stopped and restarted, no DTCs present.
With engine running, cruise control tip switch reads inactive, when pressed in it reads I(set) so the switch is working
Clutch switch reads active
With brake pedal depressed Brake switch 1 reads active
                                      Brake switch 2 reads active

Both old and new switches seemed the same - open circuit extended, closed circuit compressed.

I wonder if the ECU requires many restarts before it regards cruise as operative.

My thanks to DG for wisdom and advice. Haynes was little help.

And a lesson in why you don't just change parts without proper diagnosis


On live data, is it showing the Cruise switch options - can't remember exactly what they are call on Vectra, but On Omega, its called I, 0, R. (guessing short for Increase/Off/Reduce)

[terry paget]

Also, re your codes, P0597 is a thermostat code and the P0014 relates to the variable valve solenoids... and resolved by removing the gauze filters as per the 1.8 Astra

Thanks for all your help, DG.
Checking faults again this afternoon, P0597 has reappeared, thermostat you say. I believe that, I knew the thermostat was inactive on journey home after purchase. I will change it soon.
Interesting discovery - depressing the brake pedal, brake switches both went from inactive to active; depressing clutch pedal, nothing changed, it read active pressed or relaxed. Contemplate.

[terry paget]

New Vx clutch switch arrived today, and fitted. No change though, cruise still inoperative. Went through 5 engine start stop cycles, no change. The cruise symbol does not appear left of fuel gauge on ign. switch on, and in short test run at 40mph cruise would not engage.

Put it back on diagnoser. Same fault codes. I cancelled them, stopped and restarted, no DTCs present.
With engine running, cruise control tip switch reads inactive, when pressed in it reads I(set) so the switch is working
Clutch switch reads active
With brake pedal depressed Brake switch 1 reads active
                                      Brake switch 2 reads active

Both old and new switches seemed the same - open circuit extended, closed circuit compressed.

I wonder if the ECU requires many restarts before it regards cruise as operative.

My thanks to DG for wisdom and advice. Haynes was little help.

And a lesson in why you don't just change parts without proper diagnosis


On live data, is it showing the Cruise switch options - can't remember exactly what they are call on Vectra, but On Omega, its called I, 0, R. (guessing short for Increase/Off/Reduce)

Pressing the top switch, reading goes from inactive to I(set); pressing bottom switch reading goes from inactive to R(resume); presing slim back switch it goes from inactive to O(off).

[Doctor Gollum]

Next step then is checking the wiring to the clutch switch might be chafed against the dash structure/steering column.

Had an issue with a Peugeot 405 where adjusting the steering column pinched the immobiliser/alarm wiring, so would not rule that out 

[terry paget]

Next step then is checking the wiring to the clutch switch might be chafed against the dash structure/steering column.

Had an issue with a Peugeot 405 where adjusting the steering column pinched the immobiliser/alarm wiring, so would not rule that out 

Will check, though the wiring is very short. I checked the new Vx switch with a meter, worked OK. I swopped the switches, and checked the old switch, also OK. I then noticed that by sticking probes against the 2 pins to check continuity, I had bent one of them. I bent it bck as best I could.

I wonder if the original switch had gone in with bent pins, so when the plug was pushed in it did not go on to the pins, but bent one over. And did I inadvertently bend a pin when testing the new switch?

Am I right in saying that the live data should go from active to inactive on pedal depression, like the brake pedal?

[terry paget]

I cannot see any sign of cable snagging or chafing through. It is anchored a short distance fron the switch, to keep it out of harm's way. I gave it a pulling about, then checked whether anything had change, it had not. The Switch plunger is certainly going in and out as the clutch pedal is depressed.

[Doctor Gollum]

Don't forget the column on those goes in/out as well as up/down

[terry paget]

Don't forget the column on those goes in/out as well as up/down

I didn't know it did.