ECM Replacement
  1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
  1. Turn the ignition switch ON (II).
  1. Make sure the HDS communicates within the ECM. If it doesn't, go to the DLC circuit troubleshooting.
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Remove the center console.
  1. Remove the passenger's kick panel.