Accord V6-3.0L Hybrid (2005)
Engine Control Module: Service and Repair
Updating the ECM/PCM
PCM Updating and Substitution for Testing
Special Tools Required
Honda interface module (HIM) EQS05A35570
Use this procedure when you have to substitute a known-good PCM in a troubleshooting procedure. Update the PCM only if the PCM does not have the
latest software loaded.
NOTE: Do not turn the ignition switch OFF while updating the PCM. If you turn the ignition switch OFF before completion, the PCM can be damaged.
How to Update the PCM
NOTE:
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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 can not update a PCM with the program it already has. It will only accept a new program.
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Before you update the PCM, make sure the vehicle's battery is fully charged.
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To prevent PCM damage, do not operate anything electrical (audio system, brakes, A/C, power windows, moonroof, door locks, etc.) during the
update.
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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 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). Do not start the engine.
2. Connect the HDS or the Honda interface module (HIM) to the data link connector (DLC) (A) located under the driver's side of the dashboard.
3. Do the PCM update procedure as described on the HIM label and in the PCM update system.
4. Check for DTCs with the HDS. If DTC U0300 is indicated, go to troubleshooting U0300, then back to "PCM Updating". If DTC is not indicated,
go to step 5.
5. Do the PCM idle learn procedure.
6. Do the CKP pattern clear/pattern learn procedure.
How to Substitute the PCM
1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
