Honda ACCORD HYBRID 2005 Service Manual page 686

IMA System
G e n e r a l T r o u b l e s h o o t i n g I n f o r m a t i o n
MCM Updating and Substitution for Testing
Special Tools Required
Honda interface module (HIM) EQS05A35570
Use this procedure w h e n y o u have to substitute a
known-good M C M in a t r o u b l e s h o o t i n g procedure.
The M C M has the programs for the IMA motor control
and the IMA battery condition m o n i t o r .
Update the M C M if either or both p r o g r a m s are not the
latest.
NOTE: Do not t u r n the ignition switch OFF w h i l e
updating the M C M . If you turn the ignition switch OFF
before c o m p l e t i o n , the M C M can be damaged.
How to Update the MCM
NOTE:
• To ensure the latest programs are installed, do an
M C M update whenever the M C M is substituted or
replaced.
• Select I M A m o t o r and/or IMA battery in the HIM
ECM/PCM update menu.
• You can not update an M C M w i t h the p r o g r a m it
already has. It w i l l only accept a new p r o g r a m .
• Before y o u update the M C M , make sure the vehicle's
battery is fully charged.
• To prevent M C M damage, do not operate anything
electrical (audio system, brakes, A/C, power w i n d o w s ,
door locks, etc.) during the update.
• If y o u need to diagnose the Honda interface module
(HIM) because the HIM's red ( # 3 ) light came on or
w a s flashing during the update, leave the ignition
switch in the ON (II) position w h e n y o u disconnect the
HIM f r o m the data link connector (DLC). This w i l l
prevent M C M damage.
( c o n t ' d )
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 dashboard.
3. Do the M C M update procedure as described on the
HIM label and in the M C M update system.
4. Do the PCM idle learn procedure (see page 11-340).
How to Substitute the MCM
1. Remove the M C M (see page 12-140).
2. Install a known-good M C M .
3. Do the MOTOR ROTOR POSITION CALIBRATION.
NOTE: If the IMA battery level gauge (BAT) displays
no segments, start the engine, and hold it between
3,500 r p m and 4,000 r p m w i t h o u t load (in Park or
neutral) until the BAT displays at least three
segments.
12-8