U0287 Lost Communication With Transmission Fluid Pump Module

Definition

Common causes

• Faulty transmission fluid pump module
• Wiring issues (damaged, corroded, or loose connections)
• Faulty transmission control module (TCM)
• Software issues or programming errors
• Blown fuses
• Poor ground connections
• Electrical interference
• Low battery voltage or weak battery
• Faulty connectors or terminals

Common misdiagnoses

• Faulty Transmission Control Module (TCM)
• Wiring issues or short circuits
• Faulty Transmission Fluid Pump
• Low transmission fluid levels
• Faulty Engine Control Module (ECM)
• Corrupted software or firmware in the TCM
• Faulty connectors or terminals
• Issues with the vehicle's CAN bus system
• Faulty sensors related to transmission operation
• General electrical issues or battery problems

Troubleshooting steps

1. 1. Check for Additional Codes

   Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

2. 2. Inspect Wiring and Connectors

   Visual Inspection: Check the wiring harness and connectors related to the transmission fluid pump module for any signs of damage, corrosion, or loose connections

3. 3. Connector Pins

   Ensure that the pins in the connectors are not bent, corroded, or damaged

4. 4. Test the Transmission Fluid Pump Module

   If accessible, test the transmission fluid pump module for proper operation. This may involve checking the power and ground circuits to the module

5. 5. Use a multimeter to measure voltage and ground at the module's connector

6. 6. Check for Communication Issues

   Use a scan tool to check if the transmission fluid pump module is communicating with the vehicle’s network. If it is not, there may be a problem with the module itself or the communication lines

7. 7. Inspect the CAN (Controller Area Network) bus for faults, as communication issues can stem from problems in the network

8. 8. Inspect the Transmission Control Module (TCM)

   Since the TCM manages communication with the transmission fluid pump module, ensure that the TCM is functioning correctly

9. 9. Check for any updates or reprogramming that may be needed for the TCM

10. 10. Check Power and Ground

    Verify that the transmission fluid pump module is receiving the correct voltage and ground. Use a multimeter to check the power supply and ground connections

11. 11. Look for Software Updates

    Check if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates to fix communication issues

12. 12. Perform a Hard Reset

    Disconnect the vehicle's battery for a few minutes to reset the control modules. Reconnect and see if the code reappears

13. 13. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have documented common issues and fixes for this code

14. 14. Replace the Module (if necessary)

    If all other steps have been exhausted and the module is still not communicating, it may need to be replaced. Ensure that the replacement module is compatible with the vehicle.1

15. 15. Seek Professional Help

    If you are unable to resolve the issue, consider seeking assistance from a qualified mechanic or dealership, especially if specialized diagnostic equipment is needed.Conclusion By following these troubleshooting steps, you can systematically identify the cause of the U0287 code and take appropriate action to resolve the issue. Always refer to the vehicle's service manual for specific procedures and specifications related to your vehicle