PCM Update: Procedure

NOTE: 

• Use this procedure when you need to update the PCM at anytime.
• Make sure the HDS or the MVCI has the latest software version.
• Before you update the PCM, make sure the battery in the vehicle is fully charged, and connect a jumper battery (not a battery charger) to maintain system voltage.
• Never press the engine start/stop button during the update. If there is a problem with the update, keep the vehicle in ON mode.
• To prevent PCM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, moonroof, door locks, etc.) during the update.
• To ensure the latest program is installed, do a PCM update whenever the PCM is substituted or replaced.
• You cannot update a PCM with a program it already has. It will only accept a new program.
• High temperature in the engine compartment might cause the PCM 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.
• If you need to diagnose the MVCI because any error message is indicated on the MVCI display during the update, keep the vehicle in ON mode when you disconnect the MVCI from the data link connector (DLC). This will prevent PCM damage.

1. HDS - Connect

   Courtesy of HONDA, U.S.A., INC.

   1. Press the engine start/stop button to select the ON mode, but do not start the engine. 2. Connect the HDS to the DLC (A) located under the driver's side of the dashboard. 3. Make sure the HDS communicates with the PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting .

2. PCM - Update

   1. Exit the HDS diagnostic system, then select the update mode and follow the screen prompts to update the PCM. 2. If the software in the PCM is the latest, disconnect the HDS or the MVCI from the DLC, and go back to the procedure that you were doing. If the software in the PCM is not the latest, follow the instructions on the screen. If prompted to choose the PGM-FI system or the A/T system, make sure you update both.NOTE:  If the PCM update system requires you to cool the PCM, follow the instructions on screen. If you run into a problem during the update procedure (programming takes over 15 minutes, status bar goes over 100 %, immobilizer indicator flashes, HDS screen freezes, etc.), follow these steps to minimize the chance of damaging the PCM: Keep the vehicle in the ON mode. Connect a jumper battery (do not connect a battery charger). Shut down the updating tool. Disconnect the updating tool from the DLC. Reboot the updating tool. Reconnect the updating tool to the DLC, and try the update procedure again.

3. PCM - Idle Learn

   1. Do the PCM idle learn procedure .

4. CKP Pattern - Clear/Learn

   1. Do the CKP pattern clear/CKP pattern learn procedure .