Acura 2002 RSX Service Manual page 633

DTC P0780: Mechanical Problem in Hydraulic
Control System
NOTE:
. Record all freeze data and review General
Troubleshooting Information (see page 14-3) before
you troubleshoot.
. This code is caused by an electrical circuit problem
and cannot be caused by a mechanical problem in the
transmission.
. KeeD reolacement solenoid valves on hand;
- A,/T clutch pressure control solenoid valves A, I
a n d C
- Shift solenoid valves A, B. C, D, and E
1. Check whether the OBD li scan tool indicates
another code.
Does the OBD tt scan tool indicate another code?
YES - Perform the troubleshooting flowchart for
the indicated code(s). Check for DTC P0780 after
troubleshooting.l
NO Go to step 2.
Turn the ignition switch oFF.
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 1 .
4. Replace the A/T clutch pressure control solenoid
v a l v e s B a n d C ( s e e p a g e 1 4 - 1 3 2 ) .
5 . R e s e t t h e P C M 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
(15A) fuse in the under-hood fuse/relay box for
more than 10 seconds.
6. Drive the vehicle for several minutes in 1st,2nd,
3rd, 4th. and 5th gears in D position, and stop the
vehicle. Do not stop the engine.
7. Repeat step 6 five times.
8. Recheck for DTC P0780.
Does the OBD ll scan tool indicate code P0780?
YES Go to step 9.
NO The problem has been corrected.!
2.
3 .
9 .
1 0 .
Turn the ignition switch OFF.
Replace the shift solenoid valves A, B, C, D and E
( s e e p a g e 1 4 - 1 2 7 ) .
Reset the PCM memory by removing the No. 6 ECU
(15A) fuse in the under-hood fuse/relay box for
more than 10 seconds,
Drive the vehicle for several minutes in 1st, 2nd,
3rd, 4th, and 5th gears in [E position, and stop the
vehicle. Do not stop the engine.
Repeat step 12 five times.
Recheck for DTC P0780.
Does the OBD tt scan tool indicate code P0780?
YES Go to step 16.
NO The problem has been corrected.l
Check for warranty coverage.
ls the vehicle under watrantY?
YES - Replace the transmission assembly.l
N O - G o t o s t e p 1 6 .
Turn the ignition switch OFF.
Remove the transmission, and overhaul
transmission hydraulic control system.
lnstall the transmission on the vehicle.
Reset the PCM memory by removing the No. 6 ECU
(15A) fuse in the under-hood fuse/relay box for
more than 10 seconds.
Drive the vehicle for several minutes in 1st, 2nd,
3rd, 4th, and 5th gears in [E position, and stop the
vehicle. Do not stop the engine.
Repeat step 20 five times.
Recheck for DTC P0780.
Does the OBD lt scan tool indicate code P0780?
YES Replace the transmission assembly.l
NO--The problem has been corrected.l
12.
1 4 .
1 l .
1 1 .
t 5 .
1 6 .
't8.
1 9 .
2 1 .
22.
20.
1 4- 10 1