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1st July 2022, 21:59 | #11 |
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Can you move the cog wheel manually ie large flat bladed screwdriver in the slots (carefully)? If not it has jammed and needs replacing.
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3rd July 2022, 17:28 | #12 |
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Hi Vitesse.
Thanks for the response and apologies for slow reply, been working all weekend , no it doesn’t move, but I haven’t wanted to force it too much. So on that basis, it’s a high chance it’s the actuator that’s failed, I was expecting more towards 12v when I tested with the old voltmeter. I’ll try the actuator first Thanks in advance Matt |
4th July 2022, 17:29 | #13 | |
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KV6 only
Quote:
This 3 year old thread is interesting and mention of traction control and cruise control components prompted me to read all about it in RAVE. Firstly just to clarify that these two systems don't share any control equipment.
There's a chart to help with basic diagnosis:
Simon
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4th July 2022, 18:56 | #14 |
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From first hand experience, my traction control unit on my KV6 auto (which is identical to the unit that is used on the cruise control on the early BMW E39) performs a self test when ign is turned on.
This involves the traction control unit completely closing the second butterfly in the throttle assy and then returning to its rest open position, if it cannot complete this action ( due to among other things broken or jammed teeth on the drive) then the traction control sign is displayed on the IPK
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Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident Last edited by stocktake; 4th July 2022 at 19:10.. |
5th July 2022, 19:01 | #15 |
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Thanks both for the reply.
Absolutely agreed, the earlier post related to cruise control in places, but my issue is very much traction control only. The fault light comes in during the 4 sec testing stage, am I right to think it should close and open during this test? The fault light stays on permanently there after, have tried the on/off button too I do not have any other warning lights for abs, etc, so I was assuming it not to be the pump or wheel sensor on that basis. As suggested by vitesse I’ve tried a screwdriver in the cog and it does not budge. I’ve managed to locate a cheap enough E39 actuator, so will update the page once it arrives, as this has been quite an informative post. Thanks in advance Matt |
5th July 2022, 19:15 | #16 |
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It's the early E39 actuator and then it may have a different electrical plug but usually they are the same, the later ones are totally different, you can tell by looking at them the difference is so obvious, also the cable will need swapping (easy peasy). And yes the cog should move during self test ( it is quite a heavy old cog to move to he honest dont be shy)
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Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident |
5th July 2022, 19:42 | #17 | |
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Quote:
Keep well ps Poor photo but believe this may be the kind with the other connector: https://www.ebay.co.uk/itm/173969930...4AAOSwxGBdMcIn Last edited by vitesse; 5th July 2022 at 20:20.. Reason: Link |
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8th July 2022, 13:10 | #18 | |
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Quote:
I've just tried Stocktake's test on my KV6 auto (of the same age as his). With my right hand resting on the traction control actuator and my left switching on the ignition, I can feel and hear the two distinctive operations which Dave explains as the secondary throttle butterfly closing and opening again. So yes, yours should do this and the traction control warning should not appear in the message centre. I hope this helps. Simon
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