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Everything posted by Rick150

  1. Again thanks for the update. These vehicles have limited space around sensors and controllers. Seems to me any repair is a planned attack to get to the offending item (s). All said they are fun and I don't take the numerous fault codes seriously, I just get around to fixing it in my time.
  2. There are 2 wires to the sensors, one is brown. To identify the sensor your talking about do you know the other wire color, green/brown?
  3. My electrical diagram only shows what's already posted, valid for 2009 4.8L, 3.6L & 4.8L Turbo.
  4. Thanks for the update. Imagine the cost of getting a repair shop to do all this!
  5. Can you take a close pic of the belt? Bend it back 180 degrees so we can see the drive side. Something strange going on unless it's well past it's replacement time. Usually belts just fly off but yours seems to have a lot of energy stored, like a rubber band. If it's not just a belt failure due to age then it's probably going to happen again so you need to understand why it failed. Check the pulleys by rotating them, they should be free running with no noise.
  6. There is no direct wiring from the drivers door to the tailgate, it goes to the Driver identification control unit that decides if all the conditions are met to open or close it then passes it on. As you can see from the circuits of the Tailgate that it all terminates to the CAN BUS which talks to the control unit. Could be that one of the conditions to activate is not true, which one I have no idea. The Cayenne has an electrical system that relies on LOGIC that's present on the CAN lines and in the control unit there will be a 'Truth Table' that decides if to let you activate anything. If you had a scanner it might point to what seems like an unrelated fault code that could help.
  7. The wiring for the lights is quite extensive and quite difficult to put into a format to post. I recommend going to eBay and purchasing a manual. Not all models comply with the wiring diagrams I have as they are mostly for the 957 although 955 is pretty much the same. This shows the lock and light combination.
  8. Just to put my mine at rest did you check fuse 31? when you try and open the tailgate it will make noise but not open if 31 is blown. It's under the left side dash cover.
  9. Don't know much about the trailer hitch, only that it is coded to the vehicle. I would check Ground MB41 near the left tail light.
  10. Your correct, MB23 is an important Ground for all those systems.
  11. Check the high current connections, they are to thick ones from the battery under the seat to the starting circuit and to ground. Now that you know it's a corrosion problem then unbolt and clean them, don't just look. Check any connectors you can get access to as well.
  12. Battery connections to the starter is where you feel the heat. Clear the suspension warning, in fact all warnings now you have fixed most of your problems and see if they re-appear.
  13. Check the CCA of the starter battery, better still plug in a diagnostic unit that has the voltage curve when starting. After starting the car put your hand on the terminals related to starting and if they are warm you have a bonding problem, can be + or - Here is what you requested.
  14. mb23 is ground point, you can see the brown wires going to it. This is info you need for the charge relay.
  15. First of all get the Crank Current (CC) of your battery checked because voltage doesn't mean much, you need to know the health of the battery. Check MB23 as you have already checked GP25? Check the fuses. The alternator must have windings excited to make power so it could be on the regulator side of the system with a problem with low voltage, Bad ground? Here is the Charging Circuit.
  16. MIG welding is recommended. I would buy a genuine stud but it's up to you. Here is an option that will save you from welding but it has to be done right! 1x Ground Connector Tip Negative Earth Stud for Car Dent Repair Welding Machine WWW.EBAY.COM Find many great new & used options and get the best deals for 1x Ground Connector Tip Negative Earth Stud for Car Dent Repair Welding Machine at the best online prices at eBay! Free shipping for many products! Remember that wiring corrodes on the Porsche because it has a galvanised body and when two dissimilar metals have a current path like moisture or even high humidity air the wires get eaten away. So, if you fit anything to a Porsche body make sure you use a paste to stop this action. This is from the body repair instructions. To protect electronic control units from over voltage during electric arc welding, the following work regulations must be observed:  When performing welding work: Remove plug connections on the engine, transmission and airbag control units.  Remove clamp from negative terminal of battery and cover the battery.  When welding work is extensive, electronic control units in the immediate vicinity of the welding point must be removed.  Connect the ground connection of the electric arc welding equipment as near as possible to the welding point on the part to be welded. Ensure that there are no electrically insulated parts between the ground connection and the welding point.  Do not touch electronic control units or electric cables with the ground connection or the welding electrode. Attached is what connects to MB26.
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