DTC 50: EPS Control Unit Internal Circuit(CPU or Microcomputer) Clear the DTC. Start the engine. Does the EPS indicator come on? YES - Go to step 3. NO - The system is OK at this time. Stop the engine, and verify the DTC. Is DTC 50 indicated? YES - Check for loose EPS control unit connectors. If necessary, substitute a known-good EPS control unit and recheck. NO - Perform the appropriate troubleshooting for the code indicated.

DTC 51: EPS Control Unit Internal Circuit (E2PROM) Clear the DTC. Start the engine. Does the EPS indicator come on? YES - Go to step 3. NO - The system is OK at this time. Stop the engine, and verify the DTC. Is DTC 51 indicated? YES - Check for loose EPS control unit connectors. If necessary, substitute a known-good EPS control unit and recheck. NO - Perform the appropriate troubleshooting for the code indicated.