DTC Troubleshooting: 22-01
  1. Check for continuity between EPS control unit connector D (28P) terminal No. 3 and ECM/PCM connector A (44P) terminal No. 28 *1 or ECM/PCM connector A (49P) terminal No. 29 *2 .
    *1: R20A3 engine model
    *2: K24Z3 engine model
Is there continuity?
YES -
Update the ECM/PCM if it does not have the latest software: R20A3 engine model, K24Z3 engine model, or substitute a known-good ECM/PCM: R20A3 engine model, K24Z3 engine model, then go to Step 1 and recheck. If the ECM/PCM was updated and DTCs are not indicated, troubleshooting is complete. If the ECM/PCM was substituted and DTCs are not indicated, replace the original ECM/PCM: R20A3 engine model, K24Z3 engine model. ■
NO -
Repair open in the wire between the EPS control unit and the ECM/PCM.■

R20A3 engine model
K24Z3 engine model