Acura 2002 RSX Service Manual page 615

DTC P0740: Problem in Lock-up Control
System
NOTE:
. Record all freeze data and review General
Troubleshooting lnformation (see page 14-3) before
you troubleshoot.
. Keep replacement solenoid valves on hand;
- A,/T clutch pressure control solenoid valves A
- Shift solenoid valves E
1 . C h e c k w h e t h e r t h e O B D l l s c a n t o o l i n d i c a t e s
another code.
Does the OBD ll scan tool indicate another code?
YES Perform the Troubleshooting Flowchart for
the indicated Code(s) Recheck for code P0740 after
t r o u b l e s h o o t i n g . l
NO Go to step 2.
NOTE: Do not continue with this troubleshooting
until the causes of any other DTCS have been
corrected.
2. Measure the line pressure {see page 14-'123)'
Is the Iine pressure within the service limit?
YES Go to step 3.
NO Repairthe hydraulic system as necessary l
3. Replace the shift solenoid valve E {see page 14-1271'
4. Replace the A'/T clutch pressure control solenoid
v a l v e A ( s e e P a g e 1 4 - 1 3 0 ) .
5. Turn the ignition switch OFF, and reset the PCM
m e m o r y b y r e m o v i n g t h e N o . 6 E C U ( 1 5 A ) f u s e i n
the under-hood fuse/relay box for more than 10
seconds.
6. Using the scan tool, check to be sure that the
engine coolant temperature is 176"F (80'C) or
above. lf the coolant temperature is low, warm up
the engine to normal operating temperature
(the
radiator fan comes on).
7. Drive the vehicle at the freeze data speed or at 55
mph (88 km/h) in sth gear for more than 1 minute'
8. Recheckfor code P0740.
Does the OBD It scan tool indicate code P0740?
YES Replace the transmission and torque
converter.l
NO The system is OK at this time.l
14-83