Ecm/Pcm Update - Honda Accord 2008 Manual

07/11/02 09:11:58 61TA0000_110_0231

ECM/PCM Update

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
ECM/PCM at any time.
• Make sure the HDS/HIM has the latest software
version.
• Before you update the ECM/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 to LOCK (0) or ACC (I)
during the update. If there is a problem with the
update, leave the ignition switch ON (II).
• To prevent ECM/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 an ECM/
PCM update whenever the ECM/PCM is substituted or
replaced.
• You cannot update an ECM/PCM with a program it
already has. It will only accept a new program.
• High temperature in the engine compartment might
cause the ECM/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 flashing during the update, leave the ignition
switch in ON (II) when you disconnect the HIM from
the data link connector (DLC). This will prevent ECM/
PCM damage.
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1. Turn the ignition switch to 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.
A
3. Make sure the HDS communicates with the ECM/
PCM and other vehicle systems. If it doesn't, go to
the DLC circuit troubleshooting (see page 11-208). If
you are returning from the DLC circuit
troubleshooting, skip steps 4 and 5, and clean the
throttle body after updating the ECM/PCM
(see page 11-385).
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 ECM/PCM.
＊０１
(cont'd)
11-231