how to diagnose P0700 code on Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Ensure the vehicle is on a level surface and securely supported.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  • Remove the transmission fill plug and check fluid level.
  • If the fluid is low, refill using the manufacturer-recommended transmission fluid type (typically Honda ATF-Z1 or equivalent).
  • If the fluid is dark or burnt, perform a transmission fluid change.
• Tools Required: Socket set, transmission fluid pump, fluid catch pan.
• Safety Warnings: Always wear gloves and goggles when handling fluids.

3. Check and Repair Wiring and Connectors

• Sub-steps:
  • Visually inspect all wiring and connectors related to the TCM for damage or corrosion.
  • If damaged, repair or replace wiring as necessary; ensure all connections are secure.
• Tools Required: Multimeter, wire strippers, electrical tape.
• Safety Warnings: Ensure the battery is disconnected while working on electrical systems.

4. Test and Replace the Transmission Control Module (if necessary)

• Sub-steps:
  • If all previous checks are clear, proceed to test the TCM operation.
  • If the TCM is not functioning as specified, remove it and replace it with a new module.
  • Reconnect all wiring and connectors securely.
• Tools Required: Socket set, TCM removal tool (if applicable).
• Safety Warnings: Ensure the battery is disconnected before removing the TCM.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  • Reconnect the battery.
  • Use the OBD-II scanner to clear any stored trouble codes.
• Tools Required: OBD-II scanner.
• Safety Warnings: Always ensure the vehicle is powered down before reconnecting the battery.