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

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench, fluid catch pan, and safety gloves.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts while working.

2. Inspect Transmission Fluid

• Remove the transmission dipstick and check the fluid level. If low, add the recommended fluid type (Honda ATF DW-1).
• Inspect the fluid for consistency; if it smells burnt or appears contaminated, a fluid change may be required.
• If fluid is dirty, drain the transmission fluid and replace with fresh fluid.

3. Check Wiring and Connectors

• Visually inspect the wiring harness leading to the TCM for frays, corrosion, or loose connections.
• Using a multimeter, check the voltage at the TCM connector; ensure it matches specifications in the service manual.
• Repair or replace any damaged wiring or connectors found during inspection.

4. Test the Transmission Control Module (TCM)

• Reconnect the battery and use an OBD-II scanner to clear the P0700 code.
• After clearing the code, perform a test drive to see if the code reappears.
• If the code returns, consider replacing the TCM; follow manufacturer instructions for part replacement.

5. Inspect the Transmission Range Sensor

• Locate the transmission range sensor and remove any mounting bolts.
• Disconnect the electrical connector and test the sensor with a multimeter to ensure it operates correctly across all gear positions.
• Replace the sensor if it fails the test.