Honda Civic Service Manual page 753

Electrical Troubleshooting ('96 - 98 Models)
Troubleshooting Flowchart - Lock-up Control System
NOTE: Record all freeze data before vou troubleshoot.
Possible Cause
Faulty Lock-up cont.ol system
NOTE: Do not continue with this troublesnoonno
other DTCS have been corrected.
until the causes of any
. OBD ll Sc6n Tool indicatG Code
m7{0.
. Self-diagnosis
E indicator light
indicates Code 40.
Check tor Another Code:
Check whether the OBD ll scan
t o o l o r t h e E i n d i c a t o , l i g h t
indicates another code.
Perform lhe Troublo3hooiing
F l o w c h a r t t o r t h e i n d i c a t e d
Code(s). Recheck for cod. P07il0
lilol aftor iroubl€3hooting.
Does the OBD ll scan tool or
the E indicator light indicate
another code?
Tast Line Pressure:
M e a s u r e t h e l i n e p r e s s u r e ( s e e
page 14-119 and 14-120).
Repair tho hydreulic aystem a3
necessary {3ee page 14-119).
R e p l a c e t h e L o c k - u p C o n t r o l
Solenoid Valve Assembly and
R6check;
1 . B e p l a c e t h e l o c k u p c o n t r o l
solenoid valve Ay'B assembly
(see page 14-105).
2. Turn the ignitaon switch OFF
and reset the PCM by remov
ing the BACK UP (7.5 A) fuse
in the underhood fuse/relay
box for more than 10 seconds,
3. Using the scan tool, check to
be sure that the engine cool
a n t t e m p e r a t u r e i s i n 1 7 6 ' F
(80'C) and above.
4 . D r i v e t h e v e h i c l e a t 5 5 m p h
(88 km/h) constantly for more
than one minute.
5. Recheck for code P0740 (40).
Does the OBD ll scan tool
indicate code P0740 {40)?
The systom k OK at this time.
14-74