Automotive

Car maintenance, cleaning, vehicular law, etc.

  • Automotive,  Tech

    Coding a Porsche Cayenne (E3/9Y0) with a x431

    First thing’s first:

    1. Attach a battery maintainer, charge vehicle battery to >80% or a use a power supply to maintain 14.4V to the vehicle
    2. Plug in the communication module into the OBD2 CAN-BUS port
    3. Turn the ignition to the ON position (all the way clock-wise WITHOUT stepping on the BRAKE).

    Getting to the Coding Menu on a x431

    • Diagnosis
      • Porsche
        • Manually Select
          • Cayenne
            • Cayenne -9YA (As of 2018)
              • System Selection

    Select individual Systems for Coding from here.

    Activating Wireless CarPlay on 2018 Cayennes

    Porsche could not come to a licensing agreement with Apple for the 2018 model year production in time. So even though the hardware is there, the software is not turned on for Wireless CarPlay.

    • PCM (Communication Management/Cd Radio)
      • Code/Brush Hiding
        • Brush/Hidden Modified
          • Vehicle Configuration
            • Vehicle configuration_1
              • Vehicle configuration–WLAN-5GHz Disabled -> Enabled [[WRITE]]
              • Vehicle configuration–Apple_DIO_Wireless Closed -> Open [[WRITE]]

    Activate Full CarPlay Song Scrolling and Full Keyboard Search while driving

    For safety reasons the NHTSA mandated that song scrolling and keyboard searches be limited while the vehicle is in motion. Remove that limit AT YOUR OWN RISK.

    • PCM (Communication Management/Cd Radio)
      • Code/Brush Hiding
        • Brush/Hidden Modified
          • Vehicle Configuration
            • nhtsa-properties
              • nhtsa_properties—NHTSA_limitation_switches_for_carplay_no_soft keyboard Activated —> Not Activated [[WRITE]]
              • nhtsa_properties—NHTSA_limitation_switches_for_carplay_limit_music lists Activated —> Not Activated [[WRITE]]

    Activate Rear Cross Traffic Assist (RCTA) on vehicles equipped with LCA

    You have the hardware if you have Lane Change Assist. BUT Volkswagen/Audi Group could not come up with a coherent specification for all VAG vehicles on audio/visual cues for RCTA, so this feature has been turned off. Red chevrons (>>> <<<) will appear on the PCM screen when the vehicle gear is in Reverse and there is cross traffic, BUT there is no separate audio cue from the regular Park Assist proximity sensors and the Emergecy Braking feature may or may not work when in Reverse. This is consistent with the official RCTA available in the MY2024 Cayenne per this post on Rennlist. Use AT YOUR OWN RISK.

    • Lane Change Assist, Right (Master)
      • Code/Brush Hiding
        • Brush/Hidden Modified
          • Coding Value
            • Coding value—Rear Cross Traffic Alert Without_RCTA —> With RCTA [[WRITE]]
            • Coding value—z FAS without ZFAS —> with ZFAS [[WRITE]]
    • Lane Change Assist, Left (Slave)
      • Code/Brush Hiding
        • Brush/Hidden Modified
          • Coding Value
            • Coding value—Rear Cross Traffic Alert Without_RCTA —> With RCTA [[WRITE]]
            • Coding value—z FAS without ZFAS —> with ZFAS [[WRITE]]
    • PSM (Porsche Stability Management)
      • Code/Brush Hiding
        • Brush/Hidden Modified
          • Coding value
            • Coding value_0
              • Coding value-Byte 12—Rear Cross Traffic Alert No/Off —> Yes/On [[WRITE]]

    Disable Engine Auto Start/Stop (AESS aka AS/S)

    • DME (Digital Engine Electronics)
      • Code/Brush Hiding
        • Brush Hidden/Modified
          • Activation of start-stop function Activated —> Not Activated [[WRITE]]
        • Coding value
          • Coding value_0
            • Coding value—Block07(1)—Start_stop Present —> Not Present/coding Cell Not Used [[WRITE]]
            • *This will temporarily display a drivetrain error on the gauge cluster.
    • Front-End Electronics
      • Code/Brush Hiding
        • Brush Hidden/Modified
          • Coding value
            • Coding value_3
              • Coding value-Ara start-stop Start_stop_prevention_allowed —> Start_stop_prevention_not_allowed [[WRITE]]

    Clear the DTC codes

    You will have to scan DTC (Diagnostic Trouble Codes) peruse through them and CLEAR them as trouble codes have been registered while the programming have been taking place. There should be no ECU, Transmission, or PSM trouble codes registering anymore. You should come back and recheck for codes after 50 miles or so to see if anything is broken.

    The only DTC that remained for me was that the Satellite Radio was disabled. Yeah I don’t subscribe to XM Radio. Porsche regards that as a Trouble.

  • Automotive,  Tech

    Updating the iCarsoft POR OBD tool using a Mac?

    THIS IS NOT A HOWTO ARTICLE. THIS IS A HINT FOR EXPERIENCED USERS. USE AT YOUR OWN RISK.

    Yep, you’ve read that correctly. You can update the iCarsoft firmware using a Mac. The key is to use Wine, the compatibility layer for Mac hardware that lets you run Windows apps. You can then use Wineskin PortingKit or CrossOver to wrap up the runtime environment into an icon that looks like a Mac app that you can launch by double-clicking on it. You will want PortingKit or CrossOver to run the iCarsoft update app in 32-bit, because modern MacOS is 64-bit and making Wine run in 32-bit without a wrapper is a hassle.

    Once you make those wrappers, you might want to change the boring default icons. You can use

  • Automotive

    2019~ Porsche Cayenne Turbo Oil Change

    This tutorial applies to Porsche Cayenne Turbo models 9Y0/9YA/9YB/9Y3.

    What’s so special about the Turbo?

    • There are two extra steps to the process compared to the base model Cayenne.
    • Takes an extra quart of oil compared to base model.
    • The oil drain plug is under the first under carriage plate.
    • The oil filter housing is under the front torsion bar.

    Time and Difficulty

    Easy but dirty

    • Beginner: About 8 hrs
    • DIY-er: About 4 hrs
    • Pro: About 1.5 hours
  • Automotive

    2019 Cayenne Turbo fuse box confusion

    I had a dashcam to install on a 2019 Cayenne Turbo. I needed a switched power source (ACC) and I thought I could pigtail off of something in the fuse box. I looked in the owner’s manual and found out that there was no fusebox on the passenger side which would have been closer to the desired dashcam position. So I went to the driver’s side and found that…

    1. There is no legend or markings telling me the socket numbers
    2. The fuses in the sockets don’t correspond to those in the manual

    This happened on the 2008 Cayenne Turbo too. The “first year of production” models and their manuals don’t match up.

    I couldn’t find a suitable switched power source anyways so I went to the fuse box under the dead-pedal. Same problem here; no markings and fuses are either missing where the manual say they should be or a fuse is in a position the manual doesn’t say there should be one.

    Anyways, I made an educated guess and figured out that the middle column in the bottom row had to be “Row D” in the manual. I confirmed this by pulling the fuse from position #16 – Left headlight electronics. When I turned the ignition, a warning for “Left lo-beam…” showed up on the dash. The funny thing is the left headlight still worked without the fuse. It must be the automatic hi/lo beam sensor or some other PDLS feature unrelated to the regular lights.

    So for those seeking a switched power source, you can use socket #15 and #16 (Right and Left headlight electronics). There IS enough height for piggy back adapters under the dead-pedal. If you’re using TWO piggy-back/add-a-circuit, BEWARE – the pigtail from #15 will interfere with #16. A little bit of plastic shaving/forming will be necessary. And no, you can’t flip one left-side-right either because the divider in the fusebox interferes with the piggy-back.

    Good Luck!

  • Automotive

    Adding an ACC Powered Equipment to a 2008 Porsche Cayenne Turbo

    So, for a while, I’ve been testing out some Dashboard Cameras and iPhone chargers that utilize the Cigarette Lighter Socket in the car. When I decided to mount the equipment to the car permanently, I wanted to draw power from the car from somewhere other than the Cigarette Lighter Socket where I had to keep the ash tray open. I also wanted the power to turn on and shut off with the ignition of the vehicle.

    On the Cayenne’s two fuse box by the driver’s side and passenger side doors, there are some open sockets for factory installed options. In the vehicle manual, it should be marked “auxiliary” or “un-used”. But if you peek into the sockets, you’ll see that one side of the fuse socket will have a metal conductor. Using a voltmeter, check that you get 12V when you turn on the ignition and goes to zero when you shut off the car. If you still have something like 0.3V when you shut off the ignition, that fuse is on a timed relay from the CAN-BUS system and not a TRUE switched 12V socket. Don’t trust my photos. Each vehicle is wired differently due to the factory options available on the Cayenne. Always check and re-check with a voltmeter.

    There are two of these switched 12V fuse sockets in both fuse boxes for a total of four (4). You may use a fuse tap, a blade socket, or add-a-fuse type piggy-back to get the 12V+ from these socket. On the driver’s side fuse box, there is a hex head screw on the metal frame of the dash to supply the Ground (GND) but this is absent on the passenger side… unless you’re vehicle has been pre-configured with a grounding post for optional equipment. For those who are not so lucky, you can easily tap a hole into the metal frame to screw in a grounding post.