how to troubleshoot P0700 transmission code on my Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

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

2. Inspect and Change Transmission Fluid

• Tools Required: Socket set, funnel, drain pan.
• Sub-steps:
  1. Remove the transmission fluid pan bolts using the socket set.
  2. Carefully lower the pan to drain the old fluid into the drain pan.
  3. Inspect the pan for metal shavings or debris, which may indicate internal issues.
  4. Replace the transmission filter if applicable.
  5. Reinstall the pan with a new gasket and torque bolts to manufacturer specification (typically around 8-10 ft-lbs).
  6. Refill the transmission with the correct type of fluid (Toyota ATF WS).

3. Check and Repair Wiring/Connections

• Tools Required: Multimeter, wire brush, dielectric grease.
• Sub-steps:
  1. Locate the TCM and visually inspect the connectors for any corrosion or damage.
  2. Use a multimeter to check for continuity in the wiring harness leading to the TCM.
  3. Clean any corroded connections with a wire brush and apply dielectric grease to prevent future corrosion.
  4. Secure all connections and ensure they are properly seated.

4. Test and Replace TCM (if necessary)

• Tools Required: OBD-II scanner, multimeter.
• Sub-steps:
  1. If the wiring checks out but the P0700 code persists, test the TCM using a multimeter for proper output signals.
  2. If faulty, remove the old TCM by disconnecting the wiring harness and unscrewing it from its mounting.
  3. Install the new TCM, ensuring it is securely mounted and all connections are tight.
  4. Reconnect the battery.