how to diagnose P0700 code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent any electrical shorts.
• Safety goggles and gloves should be worn during the repair.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick or fill plug.
  2. Remove the dipstick or fill plug and check fluid level.
  3. If low, add the correct type of ATF (refer to the owner’s manual).
  4. If fluid is dirty or smells burnt, proceed to drain and replace the fluid.
  5. Drain the old fluid using a fluid extractor or by removing the drain plug.
  6. Replace the drain plug and refill with new transmission fluid as specified.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Locate the wiring harness connected to the TCM and transmission.
  2. Inspect for any signs of wear, fraying, or corrosion.
  3. Repair or replace damaged wiring as needed.
  4. Ensure all connectors are secure and free from corrosion.

4. Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. If the TCM is found defective, disconnect the battery again.
  2. Remove any panels to access the TCM.
  3. Disconnect the wiring harness from the TCM.
  4. Remove the TCM from its mounting location.
  5. Install the new TCM, reconnect the wiring harness, and ensure it is secure.
  6. Reconnect the battery.