TL V6-3.5L (2007)
Engine Control Module: Procedures
Updating the ECM/PCM
Updating the ECM/PCM
Special Tools Required
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Honda diagnostic system (HDS)
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Honda interface module (HIM)
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HDS pocket tester
NOTE:
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Use this procedure when you need to update the ECM/PCM during troubleshooting procedures.
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Make sure the HDS/HIM has the latest software version.
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Before you update the ECM/PCM, make sure the battery in the vehicle is fully charged.
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Never turn the ignition switch OFF during the update. If there is a problem with the update, leave the ignition switch ON.
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To prevent ECM/PCM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, door locks, etc.) during
the update.
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To ensure the latest program is installed, do an ECM/PCM update whenever the ECM/PCM is substituted or replaced.
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You cannot update an ECM/PCM with a program it already has. It will only accept a new program.
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If you need to diagnose the Honda interface module (HIM) because the HIM's red (# 3) lamp 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 ECM/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 ECM/PCM and other vehicle systems. If it does not, go to the DLC circuit troubleshooting. See:
Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes If you are returning from the DLC circuit troubleshooting, skip steps 4
and 5, then clean the throttle body after updating the ECM/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 diagnostic system, then select the update mode, and follow the screen prompts to update the ECM/PCM.
7. If the software in the ECM/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 ECM/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 ECM/PCM update system requires you to cool the ECM/PCM, follow the screen prompts. If you run into a problem (programming
takes over 15 minutes, status bar goes over 100 %, D or immobilizer indicator flashes, HDS tablet freezes, etc.) during the update procedure,
follow these steps to minimize the chance of damaging the ECM/PCM:
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Leave the ignition switch in the "ON (II)" position.
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Connect a jumper battery (do not connect a battery charger).
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Shut down the HDS.
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Disconnect the HDS from the DLC.
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Reboot the HDS.
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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 ECM/PCM idle learn procedure.
