how to address P0700 code in my Toyota RAV4 XA50 (2019-2024)?

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Transmission Fluid Inspection

• Tools Required: Transmission fluid dipstick or funnel, clean rags.
• Remove the transmission dipstick and check fluid level; it should be within the "full" range.
• Inspect the fluid color and smell; it should be a bright red color and not burnt.
• If the fluid is low or discolored, top it up with the manufacturer-recommended transmission fluid.

3. Wiring Inspection

• Tools Required: Multimeter, wire brush.
• Inspect the wiring harness connected to the TCM and look for any signs of wear or damage.
• Clean any corrosion from connectors using a wire brush.
• Check continuity in the wiring using a multimeter to ensure proper connections.

4. TCM Check

• Tools Required: Multimeter, TCM diagnostic tool (if available).
• Connect the multimeter to the TCM connectors as per the service manual specifications.
• Measure voltage and resistance to ensure it meets required parameters.
• Replace the TCM if it fails the tests or shows signs of physical damage.

5. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored codes.
• Take the vehicle for a test drive to see if the P0700 code returns.