What does it mean when an electric vehicle displays 'M' and won't move?

[DeRuby]

When an electric vehicle displays 'M' and won't move, it indicates a motor malfunction that requires after-sales repair. Below are relevant details about electric vehicles: 1. Types of faults: Electric vehicle faults can be categorized into motor faults, controller faults, battery faults, and charger faults. Motors are divided into brushed and brushless types, with brushed motors gradually being phased out of the market. 2. Diagnosis method: A simple way to check for brushless motor winding abnormalities is to short-circuit the three phase wires (thick yellow, green, and blue wires) of the brushless motor together. Then manually rotate the rear wheel. If there's significant resistance or it won't turn, this indicates the motor is functioning properly.

[StRyder]

I encountered the issue of the car not moving when shifted to M gear shortly after driving an electric vehicle, which really worried me at the time. Later, I found out that the battery level had dropped below 15%, and the system automatically limited the output power to protect the battery. After charging for half an hour at a different charging station, it returned to normal. Another time, this happened during heavy rain, and upon inspection, I found that the charging port cover wasn't closed tightly, allowing rainwater to seep in and trigger the short-circuit protection. It's advisable to check the battery percentage on the dashboard before each start; if it's below 20%, charge it immediately. Additionally, during rainy days, remember to check the sealing of the charging port cover and use dust plugs to seal the holes. If none of these are the issue, consider whether the small battery's voltage is insufficient—try charging the 12V battery and then attempt again. If all else fails, it's best to visit a service station to read the fault codes. Nowadays, electric vehicle control systems are very sophisticated, so avoid disassembling them yourself.

[EllaFitz]

When troubleshooting electric vehicles, encountering the issue of the car not moving in M gear is common. Focus on inspecting several key components. First, check the pedal position sensor and use a diagnostic tool to see if the signal feedback is abnormal. Next, test the voltage balance of the battery pack, as an excessive voltage difference in a single cell group can trigger protection. Then, inspect the resolver sensor of the drive motor, as iron debris interfering with the signal can cause the control module to misjudge. Additionally, don't overlook the coolant level, as a malfunction in the thermal management system can also limit output. I recommend keeping a Bluetooth OBD scanner handy to connect to your phone, which can display fault prompts in critical moments. For prevention, avoid frequent sudden acceleration, as overheating and overcurrent can damage the control board. If symptoms are detected, immediately power off and restart. If shifting fails several times in a row, refrain from further attempts.

[VonAngelo]

My electric car suddenly wouldn't shift gears on the way to get license plates. Later, I found out the charging port cover wasn't fully closed, and the sensor mistakenly thought it was still charging. The mechanic told me a few key operation points: press the brake for 5 seconds before restarting to reset the system, and the vehicle must be completely stopped before shifting gears. Check if the air conditioning is in defogging mode, as some cars disable driving in this mode. Also, an unsecured trunk can restrict startup. It's recommended to apply some lubricant to the charging port cover switch position to prevent sticking. This issue might automatically resolve after trying to shift gears a few times, but don't exceed three attempts to avoid blowing a fuse. Now, I've developed the habit of walking around the car for inspection every time I start it, which has saved me a lot of trouble.

[EvelynFitz]

Encountering the M gear not moving requires considering driving habits. Once, I pressed the brake for too long, and the system prioritized braking, cutting off power directly; a light tap on the accelerator released it. This also frequently happens in cold weather—when the battery temperature drops below zero, power is limited, but turning on the heater for about ten minutes until the temperature rises resolves it. Additionally, on slopes exceeding 15 degrees, the anti-rollback protection restricts creeping. It's advisable to ensure the energy recovery level isn't set too high while driving, especially in Eco mode, as it can mistakenly trigger braking. Also, check the seatbelt buckle sensor under the seat by plugging and unplugging it a few times to ensure good contact. Paying attention to these details can mostly prevent sudden shutdowns.