how to diagnose P0700 transmission code on Volvo XC60 Second Generation (2018-2024)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is parked on a level surface and secure with wheel chocks.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick or access point.
  2. Remove the dipstick and wipe it clean.
  3. Insert the dipstick back and remove it to check fluid level; add fluid if low.
  4. If the fluid is dark or has a burnt smell, drain and replace it.
  5. To drain, remove the transmission drain plug or pan, allowing fluid to fully drain.
  6. Replace the filter if applicable, then reinstall the pan with a new gasket and torque to manufacturer's specifications.
• Tools Required: Socket set, torque wrench, fluid pump, transmission fluid.

3. Inspect Wiring and Connectors

• Sub-steps:
  1. Visually inspect all wiring harnesses leading to the TCM and transmission for damage.
  2. Disconnect connectors and clean terminals with electrical contact cleaner.
  3. Reconnect all wiring ensuring a secure fit.
• Tools Required: Multimeter, electrical contact cleaner.

4. Test and Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. If no wiring issues are found and fluid is in good condition, test the TCM using a diagnostic tool.
  2. If the TCM is malfunctioning, remove the old TCM by disconnecting the harness and unbolting it from its mounting location.
  3. Install the new TCM by reversing the removal process.
• Tools Required: Socket set, OBD-II scanner.