how to fix the P0700 code on my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather tools and parts before starting.
• Tools Required: OBD-II scanner, socket set, multimeter, fluid catch pan, funnel.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before opening any components.

2. Inspect and Replace Transmission Fluid

• Inspect Fluid:
  • Remove the transmission dipstick (if equipped) and check the fluid level.
  • Examine the fluid for discoloration or burnt odor.
• Replace Fluid (if necessary):
  • Place a fluid catch pan under the transmission pan.
  • Remove the transmission drain plug and allow fluid to drain completely.
  • Reinstall the drain plug and torque to manufacturer specifications.
  • Use a funnel to refill the transmission with the correct fluid type (typically Toyota ATF WS).
  • Start the engine and shift through all gears to circulate the new fluid, then check the level again.

3. Repair or Replace Faulty Components

• Wiring and Connectors:
  • Inspect the wiring harness to the TCM for any signs of damage or corrosion.
  • Repair any damaged wires or replace corroded connectors.
• Sensors:
  • Test vehicle speed sensors using a multimeter to ensure they are functioning correctly.
  • Replace any faulty sensors as indicated by testing.

4. Reset TCM

• Use the OBD-II scanner to clear the P0700 code and any associated codes from the TCM.
• Reconnect the battery and start the vehicle.