TL FWD V6-3.5L (2009)
Engine Control Module: Programming and Relearning
PCM Update
PCM Update
Special Tools Required
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Honda diagnostic system (HDS) tablet tester
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Honda interface module (HIM) and an iN workstation with the latest HDS software version
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HDS pocket tester
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GNA600 and an iN workstation with the latest HDS software version
Any one of the above updating tools can be used.
NOTE:
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Make sure the HDS/iN workstation has the latest HDS software version.
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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.
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Never turn the ignition switch to ACC (I) or LOCK (0) or never press the engine start/stop button to select the OFF or ACC mode during the
update. If there is a problem with the update, leave the ignition switch ON (II) or vehicle in the ON mode.
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To prevent PCM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, moonroof, door locks, etc.)
during the update.
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To ensure the latest program is installed, do a PCM update whenever the PCM is substituted or replaced.
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You cannot update a PCM with a program it already has. It will only accept a new program.
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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.
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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 ON (II) or vehicle in the ON mode when you disconnect the HIM from the data link connector (DLC). This will prevent PCM
damage.
1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, 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. See: Computers
and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/DLC Circuit Troubleshooting If you are returning from
the DLC circuit troubleshooting, skip steps 4 and 5, and clean the throttle body See: Fuel Delivery and Air Induction/Throttle Body/Service and
Repair/Procedures 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 HDS screen prompts.
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 PCM.
7. If the software in the PCM is the latest, disconnect the HDS/HIM/GNA600 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 %, D or immobilizer indicator flashes, HDS tablet freezes, etc.), follow
these steps to minimize the chance of damaging the PCM:
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Leave the ignition switch in ON (II) or vehicle in the ON mode.
