## EPS Components

#### DTC Troubleshooting (cont'd)

17-89

DTC 50: EPS Control Unit Internal Circuit(CPU or Microcomputer)

1. Clear the DTC.
2. Start the engine.

Does the EPS indicator come on?

YES - Go to step 3.

NO - The system is OK at this time.

3. 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)

1. Clear the DTC.
2. Start the engine.

Does the EPS indicator come on?

YES - Go to step 3.

NO - The system is OK at this time.

3. 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.