Why does my Porsche Cayenne not jump start?
If you don’t see any significant change in the voltage after you start up the car, then your alternator could be faulty. If the voltage is high at the battery (around 17 volts or higher), then the alternator’s regulator is likely faulty and needs to be replaced.
When to hook up power supply to Porsche Cayenne?
Keep in mind that Porsche recommends hooking up a vehicle power supply (and NOT a battery charger) to the car if you will be working on the vehicle for more than 15 minutes for procedures such as: using a diagnostic scanner, adjusting the headlights and any time the doors, hood and rear hatch will be open for an extended period of time.
What causes a Porsche Cayenne Battery to go flat?
On the Porsche Cayenne, a flat battery can cause a multitude of electrical glitches, Check Engine Lights (CELs) and slow starter operation. I’ve also noticed that a persistent PSM Failure message on the dash may also a symptom of a dying battery.
When do I need to charge my Cayenne Battery?
Typically, you want to charge a battery at the lowest amperage. This will take a while to do, but it is safer than running a charger at higher amperage. You should only use the higher amperage settings on a charger if you need to start the car and the battery is weak.
How do you jump start a Porsche Cayenne?
Attach the positive “+” side of the jumper cables to the terminal. Now attach the other side to the positive terminal on the car with the good battery. Attach the negative side of the jumper cables to the negative “-” post on the car with the good battery. Attach the other end to the negative terminal on the Cayenne.
What causes a Porsche Cayenne to start slow?
The electrical system on the Porsche Cayenne is rather complex and can cause a variety of problems when a battery has a low charge. On the Porsche Cayenne, a flat battery can cause a multitude of electrical glitches, Check Engine Lights (CELs) and slow starter operation.
Keep in mind that Porsche recommends hooking up a vehicle power supply (and NOT a battery charger) to the car if you will be working on the vehicle for more than 15 minutes for procedures such as: using a diagnostic scanner, adjusting the headlights and any time the doors, hood and rear hatch will be open for an extended period of time.
How can I check the battery in my Porsche Cayenne?
Simply take a screwdriver and push the latch to the closed position. This will trick the car’s computer systems into thinking that the door is closed and it will shut off the lights. Due to the design of the car, the best way to check battery condition is to use the factory Porsche diagnostic computer or a good aftermarket software package.