how to diagnose P0700 code on my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shock.
• Raise the vehicle using a jack and secure with jack stands.

2. Check Transmission Fluid

• Remove the transmission dipstick and wipe it clean.
• Reinsert the dipstick and remove it again to check fluid level; top off if necessary.
• Inspect the fluid for burnt smell or metal particles, which may indicate internal damage.

3. Repair Wiring and Connectors

• Remove any necessary covers to access the TCM wiring harness.
• Inspect each wire for fraying, corrosion, or disconnection.
• If damaged, repair or replace wires and connectors as needed.

4. Replace Transmission Control Module (if necessary)

• If the TCM is determined to be faulty, remove it by unscrewing the mounting bolts.
• Disconnect the wiring harness from the TCM.
• Install the new TCM by reversing the removal steps.
• Ensure all connections are secure and properly seated.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and monitor for any warning lights or issues.
• Clear the P0700 code using the OBD-II scanner and take the vehicle for a test drive to verify proper operation.