RDX L4-2.3L Turbo (2008)
Engine Control Module: Procedures
Updating the PCM
Updating the PCM
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 HDS and CM update software
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HDS pocket tester
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GNA-600 and an iN workstation with HDS and CM update software
NOTE:
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Use this procedure when you need to update the PCM in a troubleshooting procedure.
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Make sure the HDS/HIM has the latest 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).
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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 PCM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, moonroof (if equipped), 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 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. If it doesn't, go to the DLC circuit troubleshooting. See: Testing and Inspection/Component
Tests and General Diagnostics/DLC Circuit Troubleshooting
If you are returning from the DLC circuit troubleshooting, skip step 4 to 5 and clean the throttle body after updating the PCM.
4. USA, Canada models: Select the INSPECTION MENU with the HDS.
5. USA, Canada models: 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 (USA, Canada models). Select the update program, 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 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 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.
