Honda ACCORD HYBRID 2005 Service Manual page 956

Automatic Transmission
D T C T r o u b l e s h o o t i n g ( c o n t ' d )
DTC P0734: Problem in 4th Clutch and 4th
Clutch Hydraulic Circuit
NOTE: Record all freeze data and review General
Troubleshooting Information (see page 14-4) before
y o u troubleshoot.
1. W a r m up the engine to n o r m a l operating
temperature (the radiator fan comes on).
2. Make sure that the t r a n s m i s s i o n is filled to the
proper level, and check for fluid leaks.
3. Drain the ATF (see step 3 on page 14-231) t h r o u g h a
strainer. Inspect the strainer for metal debris or
excessive clutch material.
Does the strainer have metal debris or excessive
clutch material?
8. Monitor the OBD status for P0734 in the DTCs/
Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a fail?
YES—Repair the 4th clutch, or replace the
transmission. •
NO—Intermittent failure, the system is OK at this
t i m e . If the tester indicates NOT COMPLETE, return
to step 7 and recheck. •
YES—Replace the t r a n s m i s s i o n . •
NO—Replace the ATF (see step 5 o n page 14-231),
then go to step 4.
4. Measure the line pressure (see page 14-202).
Is the line pressure within the service limit?
Y E S — G o t o step 5.
NO—Repair the ATF p u m p and regulator valve, or
replace the transmission. •
5. Measure the 4th clutch pressure (see page 14-202).
Is the 4th clutch pressure within the service limit?
Y E S — G o t o step 6.
NO—Shift valves A, B, C, and D are stuck. Repair
the shift valves and hydraulic circuit, or replace the
transmission. •
6. Clear the DTC w i t h the HDS.
7. Test-drive the vehicle for several minutes under the
same conditions as those indicated by the freeze
data, or drive in 4th gear in the D position at speeds
over 10 m p h (16 km/h) for 20 seconds. S l o w d o w n
and stop the wheels.
14-120