DTC Troubleshooting: P1659 (40)
  1. Check for continuity between ETCS control relay 4P connector terminal No. 2 and ECM/PCM connector terminal C1.
Is there continuity?
YES -
Go to Step 15 .
NO -
Repair open in the wire between the ECM/PCM (C1) and the ETCS control relay, then go to Step 23 .
  1. Disconnect ECM/PCM connector A (44P).