how to fix P0700 code in BMW 5 Series F10/F11 (2010-2017)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, transmission fluid pump, safety goggles, gloves.
• Ensure the vehicle is on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Check Transmission Fluid

• Remove the transmission dipstick (if equipped) and check fluid level.
• If low, add the correct type of transmission fluid as specified in the owner’s manual.
• If dirty, proceed to change the fluid.

3. Change Transmission Fluid (if needed)

• Tools Required: Socket set, transmission fluid pump, drain pan.
• Place a drain pan underneath the transmission.
• Remove the transmission drain plug and allow the fluid to completely drain.
• Replace the drain plug with a new washer and torque to manufacturer specifications.
• Use a transmission fluid pump to fill the transmission with new fluid through the dipstick tube.
• Start the engine and let it idle, then cycle through all gears to circulate the fluid.

4. Inspect Wiring and Connectors

• Visually inspect the wiring harness connected to the TCM and the transmission for fraying, corrosion, or loose connections.
• Clean any corroded connectors with electrical contact cleaner and reconnect securely.

5. TCM Testing and Replacement (if necessary)

• Use a multimeter to test the voltage at the TCM connector.
• If the voltage is within specifications, reprogram or replace the TCM if it is faulty.
• To replace, disconnect the battery and carefully remove the TCM from its mount, disconnecting any wiring.
• Install the new TCM and secure it in place, reconnecting all connectors before reconnecting the battery.