how to fix P0700 code in my Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the vehicle to cool down before beginning work.

2. Check and Replace Transmission Fluid

• Tools Required: Fluid pump, socket set, transmission fluid.
• Remove the transmission pan using a socket set to access the fluid.
• Drain the old transmission fluid into a suitable container.
• Inspect the old fluid for debris or burning smell; if contaminated, a full flush may be necessary.
• Replace the transmission filter if applicable.
• Refill the transmission with the recommended fluid type as per manufacturer specifications.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter, electrical contact cleaner.
• Visually inspect wiring harness and connectors leading to the TCM for any signs of wear or damage.
• Use a multimeter to test continuity and resistance in the wiring.
• Clean any corroded connections with electrical contact cleaner and reassemble.

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

• Tools Required: OBD-II scanner, multimeter.
• If diagnostics indicate a faulty TCM, remove the old module by unscrewing the mounting bolts.
• Disconnect the wiring harness from the old TCM.
• Install the new TCM by reversing the removal steps and ensuring proper connections.
• Reconnect the negative battery terminal.

5. Final Checks

• Clear the fault codes using the OBD-II scanner.
• Start the vehicle and allow it to reach operating temperature.
• Perform a test drive to ensure smooth shifting and proper operation of the transmission.