Drive Motor B Phase U V W Circuit High

Common symptoms

What you'll notice

• Check and ensure that all motor connections (Phase U, V, W) are securely plugged in and not loose.
• Inspect the motor wiring for any signs of damage or loose connections, and repair or replace if necessary.
• Test the motor's current sensor to ensure it is functioning properly, and replace if faulty.
• Verify the correlation between the motor's current sensor readings and the actual motor performance, adjusting or calibrating as needed.
• In rare cases, if all other solutions have been exhausted, consider replacing the motor itself.

Common causes

Most likely first

1. Loose or faulty wiring connections to the drive motor's phase U, V, or W
2. Motor phase U, V, or W current sensor malfunction or failure
3. Faulty or damaged drive motor
4. Corrosion or damage to the motor control unit

How to diagnose & fix

Work through it in order

1. Loss of power or acceleration
2. Illumination of the warning light