How to Troubleshoot the i-SHIFT System
How to Update the TCM
NOTE:
  • Make sure you have the latest software on the HDS.
  • To ensure the latest program is installed, do a TCM update whenever the TCM is substituted or replaced.
  • You can not update a TCM with the program it already has. It will only accept a new program.
  • Before you update the TCM, make sure the battery is fully charged.
  • To prevent TCM damage, do not operate anything electrical (audio system, brakes, A/C, power windows, sunroof, door locks, etc.) during the update.
  • If you need to diagnose the Honda interface module (HIM) because the HIM's red (#3) light came on or was flashing during the update, leave the ignition switch in the ON (II) position when you disconnect the HIM from the data link connector (DLC). This will prevent TCM damage.
  • High temperature in the engine compartment might cause the TCM to become too hot to run the update. If the engine has been running before this procedure, open the hood and cool the engine compartment.
  1. Turn the ignition switch to ON (II) but do not start the engine.
  1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
  1. Make sure the HDS communicates with the vehicle and the TCM. If it doesn't, troubleshoot the DLC circuit; L13Z1 engine model, R18A2 engine model.
  1. If the HDS does not have the update function, disconnect the HDS from the vehicle and connect the Honda interface module (HIM).
  1. If the software in the TCM is the latest, disconnect the HDS or the HIM from the DLC, and go back to the procedure that you were doing.
    If the software in the TCM is not the latest, do the TCM update procedure as described on the HIM label or in the TCM update system.
    NOTE: If the TCM update system requires you to cool the TCM, follow what is shown on the screen.
  1. Do the i-SHIFT learning (dynamic mode).