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

Solution

1. Preparation

• Gather tools and parts needed 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. Check Transmission Fluid

• Tools Required: Transmission dipstick, funnel, new transmission fluid (if needed).
• Remove the transmission dipstick, wipe clean, and reinsert to check fluid level.
• If the fluid level is low, add the appropriate type of transmission fluid as specified in the owner's manual.
• Check the fluid condition; if dark or smells burnt, a fluid change is necessary.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter, wire brush, dielectric grease.
• Inspect the wiring harness connected to the TCM for frayed wires or loose connections.
• Use a multimeter to test for continuity and proper voltage at the TCM connector.
• Clean any corrosion on the connectors using a wire brush and apply dielectric grease before reassembly.

4. Replace Transmission Control Module (if necessary)

• Tools Required: Socket set, torque wrench.
• Locate the TCM, usually found near the transmission or under the dashboard.
• Disconnect the wiring harness from the TCM.
• Remove the mounting bolts and carefully take out the old TCM.
• Install the new TCM by reversing the removal steps, ensuring all connections are secure.
• Torque bolts to manufacturer specifications.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored DTCs.
• Start the engine and allow it to idle for a few minutes.