406 Cruise Control stops after a few minutes. Not brake pedal switch

Discussion in 'Peugeot 406' started by Bob Morrison, Feb 17, 2007.

  1. Bob Morrison

    Bob Morrison Guest

    The car is a 1997 406 - 4 cylinder petrol engined auto purchased new,
    now done 270,000 km without any serious issues and no previous
    problems with cruise control.

    Almost all operation of the car has been on motorway under cruise

    When started from cold, (daytime temperature 20 degrees Celsius)
    cruise control can be engaged normally but will invariably stop
    operating after 3 to 4 minutes (less if the temperature is higher) and
    can not be restarted immediately.

    If I continue driving at motorway speed limit of 100 kph occasionally
    attempting to restart cruise, I usually succeed after about 30 minutes
    but operation will stop after only 1 to 2 minutes.

    When daytime temperatures exceed 30 degrees Celsius, cruise will not
    work at all.

    I have driven the car this way in the two weeks since the problem
    first appeared and have found it to be quite predictable, i.e. it
    never operates longer than about 4 minutes, might be restarted after a
    half hours spell but will then only run for a minute or two and will
    not operate at all when hot.

    Car spent most of yesterday with Peugeot dealer who replaced brake
    pedal switch and steering column cruise control switch as well as
    checking all the wiring. None of this has had any effect, the problem
    remains. I have tested it today on the freeway and it behaves exactly
    as before.

    Dealer, who is not charging me for his unsuccessful repair attempt,
    says I should talk to an auto electrical specialist.

    I suspect the vacuum pump. Any suggestions?
    Bob Morrison, Feb 17, 2007
  2. Bob Morrison

    Bob Morrison Guest

    On Sat, 17 Feb 2007 05:50:36 GMT, Bob Morrison

    The problem turned out to be an intermittent open circuit in the
    vacuum release solenoid valve(part of an assembly in the engine bay
    consisting of the vacuum pump and this dud sol. valve in a plastic
    I was quoted $AUS 1,000 for the complete assembly plus installation as
    valve not sold separtely.
    Opeated on the faulty valve re-soldering dry joint(s) at coil ends and
    everything is working fine.
    Bob Morrison, Mar 16, 2007
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