how to diagnose P0700 transmission code on Ram 1500 DT (2019-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect Transmission Fluid

• Tools Required: Transmission dipstick, clean cloth.
• Remove the transmission dipstick and check the fluid level.
• Inspect the fluid color and smell; it should be red and not burnt. If it is dark or has a burnt odor, consider a fluid change.

3. Check Wiring and Connectors

• Tools Required: Basic hand tools for removing panels, multimeter.
• Remove any covers or panels to access the TCM and wiring harness.
• Visually inspect the wiring for frays, breaks, or corrosion.
• Use a multimeter to check for continuity in the wiring from the TCM to the transmission solenoids.

4. Replace Transmission Fluid and Filter (if necessary)

• Tools Required: Socket set, transmission filter kit, fluid pump.
• Drain the old transmission fluid using a drain pan.
• Remove the transmission pan and replace the filter.
• Reinstall the transmission pan with new gasket and torque to manufacturer specifications.
• Refill with the appropriate type and amount of transmission fluid.

5. Replace or Reprogram TCM

• Tools Required: OBD-II scanner, software for TCM reprogramming (if necessary).
• If the TCM is faulty, remove it from its mounting location.
• Install the new or reprogrammed TCM, ensuring all connectors are securely attached.
• Reconnect the battery and clear any codes using the OBD-II scanner.