DTC Troubleshooting: P1659 (40)
DTC P1659:
 ETCS Control Relay OFF Malfunction
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1659 indicated?
YES -
Go to Step 4 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM.■
  1. Turn the ignition switch to LOCK (0).
  1. Check the No. 18 DBW (THROTTLE ACTUATOR CONTROL) (15 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES -
Go to Step 6 .
NO -
Go to Step 17 .
  1. Remove the ETCS control relay (A) from the under-hood fuse/relay box.
  1. Test the ETCS control relay.
Is the ETCS control relay OK?
YES -
Go to Step 8 .
NO -
Replace the ETCS control relay, then go to Step 23 .
  1. Turn the ignition switch to ON (II).