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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Change Transmission Fluid

• Tools Required: Socket set, funnel, drain pan, new transmission fluid.
• Remove the transmission drain plug and allow the fluid to completely drain into the pan.
• Replace the drain plug and torque it to manufacturer specifications (usually around 30-40 ft-lbs).
• Refill the transmission with new fluid through the dipstick tube using a funnel, checking the level repeatedly.

3. Inspect and Repair Wiring and Connectors

• Tools Required: Multimeter, wire brush, dielectric grease.
• Visually inspect all wiring and connectors leading to the TCM and transmission.
• Clean any corroded connectors with a wire brush.
• Apply dielectric grease to connectors to prevent future corrosion.
• Replace any damaged wiring or connectors.

4. Replace Transmission Control Module (if necessary)

• Tools Required: Socket set, screwdriver set.
• Locate the TCM; it is typically mounted near the transmission.
• Disconnect the vehicle's battery before removing the TCM.
• Unplug the electrical connectors from the TCM.
• Remove the mounting bolts or screws and take out the old TCM.
• Install the new TCM by reversing the removal steps and reconnect all connectors.

5. Reconnect Battery and Test Drive

• Reconnect the negative battery terminal.
• Start the vehicle and allow it to reach operating temperature.
• Test drive the vehicle to check for proper transmission operation and ensure the check engine light is off.