DTC Troubleshooting: P1658 (40)
DTC P1658:
 ETCS Control Relay ON 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. Do the ETCS TEST in the INSPECTION MENU with the HDS.
Is the RELAY circuit OK?
YES -
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.■
NO -
Go to Step 3 .
  1. Turn the ignition switch to LOCK (0).
  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 6 .
NO -
Replace the ETCS control relay, then go to Step 13 .
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector A (49P).