DTC Troubleshooting: P1659 (40)

  1. Check for continuity between ETCS control relay 4P connector terminal No. 3 and ECM/PCM connector terminal A21.
Is there continuity?
YES -
Go to Step 28 .
NO -
Repair open in the wire between the ECM/PCM (A21) and the ETCS control relay, then go to Step 23 .