my Toyota Corolla E170 (2013-2019) has a check engine light with code P0700, what does it mean

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface.
• Disconnect the battery to prevent any electrical shorts.

2. Check Transmission Fluid

• Tools Required: Fluid level dipstick or transmission fluid gauge
• Remove the transmission dipstick and check fluid level.
• If low, add the manufacturer-recommended transmission fluid until it reaches the proper level.
• Inspect the fluid for color (should be bright red) and smell (no burnt odor).
• If the fluid is dark or smells burnt, a fluid change may be necessary.

3. Inspect Wiring and Connectors

• Tools Required: Multimeter, basic hand tools
• Visually inspect the wiring harness connected to the TCM and transmission for wear or damage.
• Use a multimeter to check for continuity in the wires.
• Repair or replace any damaged wires or connectors.

4. Test Transmission Control Module (TCM)

• Tools Required: OBD-II scanner
• Reconnect the battery and use the scanner to check if the TCM is communicating properly.
• If not, consider replacing the TCM or addressing any faults indicated by the scanner.

5. Fluid Change (if necessary)

• Tools Required: Socket set, transmission fluid pump, drain pan
• Drain the old transmission fluid using a drain pan.
• Replace the transmission filter if applicable.
• Refill with new, manufacturer-recommended transmission fluid using the pump.