R
Rich White
A few weeks ago I fitted a new stalk with Cruise buttons, and then when
the car was in for something else at Vx, they kindly Tech2'd it for me
to enable the CC. They reported that there was a "missing clutch
switch" error, so I just shorted out the connector (since it's
"normally closed") and I found that the CC worked fine.
Then, for no reason it just stopped - so I double checked the
connections/stalk etc, yet it was still inoperative. The next morning,
it just worked again.
Then about 2 weeks later, it just stopped working again. After checking
everything, with no success, I just thought i'd reset the ECU, by
disconnecting the battery. It worked, and the CC worked fine for
another 2 or 3 weeks. Then it stopped again, and as soon as I
disconnected/reconnected the battery it was fine.
Then yesterday (after working for 4 weeks), it just stopped again, and
the same cure worked.
I'm now confused - I know that all connections are sound, and I've got
no orange light indicating a fault (yes the bulb is working!), yet this
keep happening.
I can't see that "bypass" of the clutch switch can be causing this, can
it? I always turn off the CC before pressing the clutch (normally this
just happens as a result of touching the brakes before changing gear
anyway) - and even if I don't, and try clutching without disabling it,
the CC is intellegent to know that the revs are rising with no increase
in road speed, and it immediately turns itself off after a rise of
200-300 revs.
It seems that the ECU is losing it's "enabled" state for the CC, but
why would it work after a reset. I realise I should probably wait until
it stops again, and then get Vx to tech2 it for diagnostics (there is
no paperclip method on this late model), but I just can't think why it
would turn itself on and off like this.
Does anyone know of anything similar happening with "feature enables".
Could it be the clutch switch "botch"? (I still think this is unlikely)
Any other thoughts?
Rich
PS - It's a facelift / fly-by-wire 2.6 Omega - so there is no "CC
unit" as such, it's just part of the ECU control of the normal
throttle servo.
the car was in for something else at Vx, they kindly Tech2'd it for me
to enable the CC. They reported that there was a "missing clutch
switch" error, so I just shorted out the connector (since it's
"normally closed") and I found that the CC worked fine.
Then, for no reason it just stopped - so I double checked the
connections/stalk etc, yet it was still inoperative. The next morning,
it just worked again.
Then about 2 weeks later, it just stopped working again. After checking
everything, with no success, I just thought i'd reset the ECU, by
disconnecting the battery. It worked, and the CC worked fine for
another 2 or 3 weeks. Then it stopped again, and as soon as I
disconnected/reconnected the battery it was fine.
Then yesterday (after working for 4 weeks), it just stopped again, and
the same cure worked.
I'm now confused - I know that all connections are sound, and I've got
no orange light indicating a fault (yes the bulb is working!), yet this
keep happening.
I can't see that "bypass" of the clutch switch can be causing this, can
it? I always turn off the CC before pressing the clutch (normally this
just happens as a result of touching the brakes before changing gear
anyway) - and even if I don't, and try clutching without disabling it,
the CC is intellegent to know that the revs are rising with no increase
in road speed, and it immediately turns itself off after a rise of
200-300 revs.
It seems that the ECU is losing it's "enabled" state for the CC, but
why would it work after a reset. I realise I should probably wait until
it stops again, and then get Vx to tech2 it for diagnostics (there is
no paperclip method on this late model), but I just can't think why it
would turn itself on and off like this.
Does anyone know of anything similar happening with "feature enables".
Could it be the clutch switch "botch"? (I still think this is unlikely)
Any other thoughts?
Rich
PS - It's a facelift / fly-by-wire 2.6 Omega - so there is no "CC
unit" as such, it's just part of the ECU control of the normal
throttle servo.