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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Transmission Fluid Inspection

• Tools Required: Dipstick, funnel, clean rags
• Remove the transmission dipstick and check fluid level.
• If low, add the manufacturer-recommended transmission fluid.
• If the fluid is dark or has a burnt smell, consider a transmission fluid change.

3. Wiring and Connector Check

• Tools Required: Multimeter, wire brush, dielectric grease
• Inspect wiring harness leading to the TCM for fraying or corrosion.
• Use a multimeter to check for continuity in the wires. Repair or replace as necessary.
• Clean connectors with a wire brush and apply dielectric grease before reassembling.

4. TCM Testing

• Tools Required: Multimeter, TCM scan tool
• Connect the TCM scan tool to check for specific TCM codes.
• Perform tests as recommended by the manufacturer for TCM functionality.
• If the TCM is faulty, proceed to remove and replace it.

5. Reassemble and Reset

• Reconnect any wiring or connectors that were removed.
• Reconnect the negative battery terminal.
• Clear the error codes using the OBD-II scanner, then take the vehicle for a test drive.