Honda ACCORD HYBRID 2005 Service Manual page 244

Fuel and Emissions Systems
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
HDS Clear Command
The PCM stores various specific data to correct the
system even if there is no electrical power such as
w h e n the battery negative t e r m i n a l or No. 8 Fl ECU
(PCM) (15 A) fuse are disconnected. Stored data based
on failed parts should be cleared by using the "CLEAR
C O M M A N D " of the HDS, if parts are replaced.
The HDS has three kinds of clear c o m m a n d s to meet
this purpose. They are DTC clear, PCM reset, and CKP
pattern clear. DTC clear c o m m a n d erases all stored DTC
codes, freeze data, and readiness codes. This must be
done w i t h the HDS after reproducing the DTC during
troubleshooting.
The PCM reset c o m m a n d erases all stored DTC codes,
freeze data, readiness codes, and all specific data to
correct the system except CKP pattern. If the CKP
pattern data in the PCM was cleared, y o u must do the
CKP pattern learn procedure. The CKP pattern clear
c o m m a n d erases only CKP pattern data. This c o m m a n d
is for repair of a misfire or the CKP sensor.
DTC Clear
1. Clear the DTC w i t h the HDS w h i l e the engine is
stopped.
(cont'd)
CKP Pattern Clear/CKP Pattern Learn
NOTE: The ECT needs to be at 176 °F (80 °C) or higher.
1. Clear the CKP pattern w i t h the HDS w h i l e the
engine is stopped.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II), and w a i t
30 seconds.
4. Select CRANK PATTERN in the A D J U S T M E N T
MENU on the HDS.
5. Select CRANK PATTERN LEARNING and f o l l o w the
procedure s h o w e d on the screen.
6. Turn the ignition switch OFF.
7. Turn the ignition switch ON (II), and w a i t
30 seconds. The CKP learning procedure is
completed.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II), and w a i t
30 seconds.
4. Turn the ignition switch OFF, and disconnect the
HDS f r o m the DLC.
PCM Reset
This c o m m a n d clears stored specific data f r o m each
vehicle such as DTCs, freeze data, and readiness codes.
It does not clear CKP pattern data.
1. Reset the PCM w i t h the HDS w h i l e the engine is
stopped.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II), and w a i t
30 seconds.
4. Turn the ignition switch OFF, and disconnect the
HDS f r o m the DLC.
5. Do the PCM idle learn procedure (see page 11-340).
11-4