what does code P0700 indicate in my Toyota Highlander Third Generation (2014-2019)?

Solution

1. Preparation

• Gather tools and required parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a level surface and securely supported.

2. Fluid Check and Replacement

• Check Fluid:
  • Remove the dipstick and wipe it clean.
  • Reinsert it and check the fluid level against the markings on the dipstick.
• Replace Fluid:
  • If the fluid is low or burnt, drain the old fluid by removing the drain plug.
  • Replace with the manufacturer-recommended transmission fluid (e.g., Toyota Type T-IV).
  • Reinstall the drain plug and refill through the dipstick tube until the proper level is achieved.

3. Inspect Wiring and Connectors

• Visually inspect the wiring harness connected to the transmission and the TCM.
• Repair or replace any damaged wires or connectors.
• Ensure all connections are secure.

4. Test Transmission Control Module

• Reconnect the battery.
• Using a multimeter, check the input and output voltages of the TCM according to the specifications in the service manual.
• If the TCM is malfunctioning, replace it with a new unit.

5. Check Transmission Range Sensor

• Locate the transmission range sensor and inspect it for proper alignment and securing.
• If necessary, adjust or replace the sensor.

6. Clear Codes

• Use the OBD-II scanner to clear the P0700 code and any related codes from the system.