Some owners report that their Nissan Ariya suddenly will not start anymore. This starting problem has various causes in the electrical system or starting mechanism. The problem makes your electric car completely unusable and requires quick action. What could be wrong and how do you fix it?
Why won’t your Nissan Ariya start?
With the Nissan Ariya, starting problems arise due to faults in the electrical system. The electric car has different starting issues compared to traditional cars. With a combustion engine the cause is often a cranking starter motor or fuel, whereas in an electric car it is failing electronic components.
The most common causes are:
- Defective 12V service battery that powers the electrical system
- Faults in the high-voltage system or the battery
- Problems with the starter relay or power switches
- Error messages in the electronic control unit
- Defective sensors that block the starting system
Do you notice that your Ariya does not respond when you press the start button? Then pay attention to any warning lights on the dashboard. These often give an initial indication of the cause.
‘ Without a working 12V battery your car will remain completely dead, even if the main battery is fully charged. ’
Problems with the 12V battery
In addition to the large drive battery, the Nissan Ariya also has a small 12V service battery (auxiliary battery that powers all electronics). This battery powers all electronics and is needed to start up the system. Without a working 12V battery your car will remain completely dead, even if the main battery is fully charged.
Symptoms of a flat 12V battery (auxiliary battery that powers all electronics):
- The dashboard stays dark or only lights up weakly
- You hear a clicking sound when you press the start button
- The central locking works slowly or not at all
- Error messages appear without any clear cause
First check the voltage of the 12V battery with a multimeter (voltage measuring device). It should be at least 12.4V. Any lower means charging or replacement is needed. Also check for corrosion on the battery terminals, as this blocks the power supply.
Power switch and relay faults
The Ariya’s starting system uses several relays and switches. These components control the power supply to the drive system. A defective relay blocks starting, often noticeable as a clicking sound without any further response from the car.
With power switch faults you notice that the system seems to power up, but does not fully start. The car does not go into READY mode, which means you cannot drive off. This may be caused by:
- A defective starter relay that does not make contact
- Blown fuses in the high-voltage system
- Poor connections due to corrosion or vibration
- Software problems in the control unit
Locate the fuse box according to the handbook. Visually check whether any fuses have blown. Only replace them with fuses of the same rating. Never swap relays without knowledge of the system, as this can cause damage.
High-voltage system and battery problems
The Ariya’s main battery can also cause starting problems. Although the battery itself rarely fails completely, systems that protect the battery preventively block starting. This happens in extreme temperatures or when the system detects a fault.
Symptoms that indicate battery-related starting problems:
- Warning lights for the battery system
- The car does start, but immediately shuts down again
- Error messages about the drive system
- Reduced charging performance in the period before the problem
With these symptoms, professional diagnosis (reading out and testing by a garage or dealer) is needed. You must not repair the high-voltage system yourself because of the risk of electric shock. Have a Nissan dealer or specialist garage read out the system with diagnostic equipment.
‘ The system then thinks that starting is not safe, even though there is nothing physically wrong. ’
Software and sensor faults
Modern electric cars such as the Ariya run on complex software. Sometimes starting problems arise due to software faults or defective sensors. The system then thinks that starting is not safe, even though there is nothing physically wrong.
First try resetting the system by temporarily disconnecting the 12V battery. Wait a few minutes and reconnect it. This resets many electronic systems. Note: you may lose settings and the car may need to be paired with your key again.
Does the problem persist? An OBD scanner (device for reading fault codes) reads out fault codes that point to the cause. Sensors that often cause problems are the brake sensor, gear selector sensor or the sensor that detects whether the key is present. These sensors must send the correct signals before the car is allowed to start.
What can you do yourself?
If you have starting problems with your Nissan Ariya, carry out a few basic checks first before going to the garage:
- Check whether the 12V battery has sufficient voltage
- Look at warning lights and write down any fault codes
- Test whether the central locking and other electronics are working
- Try resetting the system by briefly disconnecting the battery
- Check whether all cables and connectors are properly secured
Important: never touch the orange high-voltage cables. These carry high voltage and are life-threatening. Only work on the 12V systems if you know what you are doing. If in doubt, contact a professional straight away.
When should you go to the garage?
Does your Ariya still not start despite the checks above? Then you need professional help. A specialist garage or Nissan dealer will use diagnostic equipment to find the exact cause. They read out fault codes from all control units and safely check the high-voltage system.
Have the car towed if it will not start. Do not try to push it or bump-start it, as this is pointless with an electric car. The roadside assistance included with your insurance often provides immediate help and takes the car to a suitable garage.
With recurring starting problems there is a persistent fault. Ask the garage to install all software updates. Nissan regularly releases updates that resolve known issues. A thorough check of all electrical connections also helps to prevent future problems.
On the Carnews website you will find more information about electric cars, maintenance and common problems. Also check out other articles about the Nissan Ariya and read how to detect and prevent problems at an early stage.
Frequently asked questions
First check the battery: see whether the lights are dim, whether the terminals are clean and tight and, if possible, measure the voltage (around 12.6V is good). Listen when starting: a rapid clicking sound often points to a weak battery or relay issue, complete silence more to a starter motor, relay or fuse problem. Then check the basics, such as having enough fuel and whether all major consumers (lights, radio) are switched off. Finally, find the fuse box using the handbook and check the relevant fuses and, if possible, swap an identical relay to test.
The most common causes of power switch faults are defective relays, blown fuses and corrosion or poor connections in the power circuit. These faults block power to the starter motor, often noticeable as a clicking sound without the engine turning over. You can prevent this by periodically checking the fuse box, cleaning relays and contacts (for example with contact cleaner) and repairing oxidised or loose connections. If the problems keep coming back, have the system checked with professional diagnostic equipment (OBD, battery test) to detect hidden faults at an early stage.
Only resolve a starting problem or power switch fault yourself if it concerns simple, safe checks such as checking battery terminals, visually inspecting fuses or swapping a relay according to the diagram in the handbook. Contact a professional immediately in case of repeated failure, unclear electrical faults, smell of burning, smoke, or if you have no experience working on electrical systems. Do not use jump leads or improvised solutions if you do not know exactly what you are doing, as this can cause serious damage to the electronics. If in doubt or if the car still does not start after your own basic checks, call roadside assistance or a garage straight away.
Electrical components that are often involved include the battery, starter motor, relays and fuses in the starting circuit, and sometimes ignition components such as coil pack and sensors (crankshaft/camshaft sensor). You can recognise a flat or weak battery by dim lighting and a rapid clicking sound when starting. A defective starter motor usually gives a single click or heavy, slow cranking without the engine firing. Relay or fuse problems often cause only a click or no reaction at all when you turn the key, while with sensor or coil problems the engine cranks for a long time, especially when warm, but does not fire or only starts with difficulty.
