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Home >> Honda >> 2008 >> Civic L4-1.8L CNG >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Testing and Inspection >> Programming and Relearning >> Updating the ECM/PCM

Updating the ECM/PCM

Updating the PCM

Special Tools Required
- Honda diagnostic system (HDS) tablet tester
- Honda interface module (HIM) and an iN workstation with HDS and CM update software
- HDS pocket tester
- GNA600 and an iN workstation with HDS and CM update software
Use any one of these update tools.

NOTE:
- Use this procedure when you need to update the PCM during a troubleshooting procedures.
- Make sure the HDS/HIM 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 turn the ignition switch OFF during the update. If there is a problem with the update, leave the ignition switch ON.
- To prevent PCM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, moonroof (if equipped), door locks, etc.) during the update.
- To ensure the latest program is installed, do PCM update whenever the PCM is substituted or replaced.
- You cannot update 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 Honda interface module (HIM) because the HIM's red (# 3) light came on or was flashed 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 PCM damage.

1. Turn the ignition switch ON (II), but do not start the engine.






2. Connect the HDS to the data link connector (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. Testing and Inspection If you are returning from the DLC circuit troubleshooting, skip steps 4 and 5 and clean the throttle body after updating the PCM.
4. Select the INSPECTION MENU with the HDS.
5. Select the ETCS TEST, then select the TP POSITION CHECK and follow the screen prompts with the HDS.

NOTE:If the TP POSITION CHECK indicates FAILED, continue this procedure.

6. Exit the HDS, then select the update function and follow the screen prompts to update the PCM.
7. If the software in the PCM is the latest, disconnect the HDS/HIM 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 what is shown in the screen. If you run into a problem (programming takes over 15 minutes, status bar goes over 100 %, D or immobilizer light flashes, HDS tablet freezes, etc.) during the update procedure, follow these steps to minimize the chance of damaging the PCM.
- Leave the ignition switch in the "ON (II)" position
- Connect a jumper battery (do not connect a battery charger)
- Shut down the HDS
- Disconnect the HDS from the DLC
- Reboot the HDS
- Reconnect the HDS to the DLC, and try the update procedure again.

8. If the TP POSITION CHECK failed in step 5, clean the throttle body,
9. Do the PCM idle learn procedure,
10. Do the CKP pattern learn procedure.

Substituting the PCM

Special Tools Required
- Honda diagnostic system (HDS) tablet tester
- Honda interface module (HIM) and an iN workstation with HDS and CM update software
- HDS pocket tester
- GNA600 and an iN workstation with HDS and CM update software
Use any one of these update tools.

NOTE: Use this procedure when you need to substitute a known-good PCM during troubleshooting procedures.

1. Make sure you have the anti-theft codes for the radio and the navigation system (if equipped).






2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
3. Turn the ignition switch ON (II).
4. Make sure the HDS communicates with the PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting. Testing and Inspection If you are returning from DLC circuit troubleshooting, skip steps 5 and 6 and clean the throttle body after substituting the PCM,
5. Select the INSPECTION MENU with the HDS.
6. Select the ETCS TEST, then select the TP POSITION CHECK and follow the screen prompts.

NOTE: If the TP POSITION CHECK indicates FAILED, continue this procedure.

7. Turn the ignition switch OFF.
8. Remove the battery.






9. Remove the cover (A).






10. Remove the bolts (D), then remove the PCM (E).
11. Disconnect PCM connectors A, B, and C.

NOTE: PCM connectors A, B, and C have symbols (A=Square, B=Triangle, C=Circle) embossed on them for identification.

12. Install the PCM and the battery in the reverse order of removal.
13. Turn the ignition switch ON (II).

NOTE: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the PCM; ignore it, and continue this procedure.

14. Manually input the VIN to the PCM with the HDS.
15. Update the PCM if it does not have the latest software.
16. Select the IMMOBI SYSTEM with the HDS.
17. Enter the immobilizer code with the PCM replacement procedure in the HDS; it allows you to start the engine.
18. Reset the PCM with the HDS.
19. If the TP POSITION CHECK failed in step 7, clean the throttle body.
20. Do the PCM idle learn procedure.
21. Do the CKP pattern learn procedure.
22. Enter the anti-theft codes for the radio and the navigation system (if equipped) and set the clock.
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