how to fix P0700 code on Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Gather tools and parts needed for repairs.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, funnel, socket set, drain pan.
• Remove the transmission fluid drain plug and drain the old fluid into a pan.
• Replace the drain plug and refill with new transmission fluid according to the manufacturer's specifications (typically Toyota ATF WS).
• Start the engine and cycle through the gears while checking the fluid level.

3. Inspect and Repair Wiring and Connectors

• Tools Required: Multimeter, wire strippers, soldering iron (if needed).
• Visually inspect the wiring harness connected to the TCM for any signs of wear or damage.
• Use a multimeter to check for continuity and proper voltage at the TCM connectors.
• Repair or replace any damaged wires or connectors as necessary.

4. Test and Replace TCM (if necessary)

• Tools Required: OBD-II scanner, socket set.
• If the TCM fails electrical tests, replace it with a new unit.
• Reconnect the wiring harness and secure the TCM in place.
• Reconnect the negative battery terminal.