how to fix P0700 transmission issue in Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery cable to prevent electrical shock.
• Ensure the vehicle is parked on a level surface and securely supported.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, socket set, fluid catch pan.
• Remove the transmission fluid drain plug and allow fluid to drain completely into the catch pan.
• Replace the drain plug with a new gasket and torque to the manufacturer’s specifications.
• Refill the transmission with the appropriate type of transmission fluid as specified in the owner’s manual.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter, wire brush, dielectric grease.
• Visually inspect the wiring harness and connectors to the TCM for signs of wear or damage.
• Clean any corrosion using a wire brush and apply dielectric grease to the connectors.
• Repair any broken or frayed wires by splicing in new wire, ensuring proper insulation.

4. Test and Replace TCM (if necessary)

• Tools Required: OBD-II scanner, multimeter, socket set.
• Use the OBD-II scanner to monitor TCM parameters while the vehicle is running.
• If the TCM is found to be faulty, remove it by unscrewing the mounting bolts and disconnecting the wiring harness.
• Install a new TCM, ensuring all connections are secure and torque the bolts to specifications.

5. Inspect and Adjust Transmission Range Sensor

• Tools Required: Socket set, torque wrench.
• Locate the transmission range sensor and check its alignment.
• If misaligned, adjust its position according to the service manual specifications.
• Tighten the mounting bolts to the specified torque.