Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Check the Operation of the Automatic Gearbox Solenoid

Model: Jeep Grand Cherokee WK2, MK 4 - Years: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Part: Transmission

See other generations:
Video tutorial

To perform this type of maintenance, you need appropriate diagnostic equipment, the wiring diagrams for the vehicle, and adequate experience: only if you have already dealt with certain fault scenarios can you consider tackling a problem like that of the automatic gearbox.

On this vehicle, it occurs that shifting the gear lever into drive selects only fourth gear, and when checking the fault memory, the diagnosis points to a solenoid issue.

Experience teaches that the first thing to check is the power supply to the solenoid itself: with the wiring diagram in hand, measure the supply voltage at the relevant pins; if you find a value below 12 volts, then there is a power supply issue likely coming from the fuse box and relay: the problem lies in the relay supplying power to the solenoid, and replacing it resolves the issue.

If you had only focused on the diagnostic indication, you would have inappropriately replaced a part that is, moreover, not inexpensive.


Updated on 15 February 2026 by ScegliAuto


Related tutorials

Check Brake Pedal Switch Electrical System
Check Brake Pedal Switch Electrical System
Jeep Grand Cherokee (2004-2010 / WH, WK, MK 3) On all cars with automatic transmission, you must press the brake pedal to allow engine start and subsequently engage the gears. If pressing the brak…
How to Open the Key of a Jeep Grand Cherokee
How to Open the Key of a Jeep Grand Cherokee
Jeep Grand Cherokee (2004-2010 / WH, WK, MK 3) How do you open the key of a Jeep Grand Cherokee? Here’s how to open the key and replace the battery inside. Unscrew the screw on the key cover, then…
How to Change the Battery on a Jeep Grand Cherokee
How to Change the Battery on a Jeep Grand Cherokee
Jeep Grand Cherokee (2010-2021 / WK2, MK 4) Is the battery of your Jeep Grand Cherokee no longer working? Let's look at the replacement after confirming it needs changing. Open the car door and…

How to Remove the Toll Tag Holder from the Car Windscreen

The toll tag holder is usually attached to the car windscreen to ensure that the toll tag functions immediately when passing through barriers. However, if you decide to remove the holder, you should follow this procedure: - Insert the toll tag into the holder; - Pull the holder inwards to detach it from the windscreen; you can use a glass scraper or a stiff plastic card to assist you; After removing the holder, it is essential to remove the adhesive from the windscreen. To remove the adhesive, we recommend using a solvent-based spray that will remove the glue without clouding the area.

Watch the video!


by ScegliAuto

More videos