Honda ACCORD HYBRID 2005 Service Manual page 979

DTC P0847: Short in 3rd Clutch Transmission
Fluid Pressure Switch Circuit or 3rd Clutch
Transmission Fluid Pressure Switch Stuck
ON
NOTE:
• Record all freeze data and review General
Troubleshooting Information (see page 14-4) before
you troubleshoot.
• This code is caused by an electrical circuit p r o b l e m
and cannot be caused by a mechanical p r o b l e m in the
transmission.
1. Clear the DTC w i t h the HDS.
2. Check the 3rd PRES SWITCH signal w i t h the HDS in
the A/T data list w h e n not in 3rd gear.
Is the 3rd PRES SWITCH OFF?
Y E S — G o to step 3.
NO—Go to step 6.
3. Start the engine and w a r m it up to normal
operating temperature (the radiator fan comes on).
4. Drive the vehicle in 3rd gear in the D3 position for
more than 5 seconds, then shift the shift lever into
the D position, and drive in 4th gear for more than
5 seconds. S l o w d o w n and stop the wheels.
5. M o n i t o r the OBD status for P0847 in the DTCs/
Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a fail?
Y E S — G o t o step 6.
NO—Intermittent failure, the system is OK at this
t i m e . Check the OP3SW (BLU/WHT) w i r e for an
intermittent short to g r o u n d between the 3rd clutch
transmission fluid pressure switch and the PCM. If
the tester indicates NOT COMPLETE, return to step
3 and recheck. •
6. Turn the ignition switch OFF.
7. Disconnect the 3rd clutch transmission fluid
pressure switch connector.
8. Turn the ignition switch ON (II).
9. Check the 3rd PRES SWITCH signal w i t h the HDS in
the A/T data list.
Is the 3rd PRES SWITCH OFF?
Y E S — R e p l a c e the 3rd clutch t r a n s m i s s i o n fluid
pressure switch (see page 14-225), then go to step
14.
N O — G o t o step 10.
10. Turn the ignition switch OFF.
11. J u m p the SCS line w i t h the HDS.
12. Disconnect PCM connector C (22P).
13. Check for continuity between PCM connector
t e r m i n a l C9 and body g r o u n d .
PCM C O N N E C T O R C (22P)
1 2
U
3 4 5 6 7
8 9 10 11 12 13 14 15
16 1 7 18 19 20
n
21 22
O P 3 S W (BLU/WHT)
W i r e side of f e m a l e t e r m i n a l s
Is there continuity?
Y E S — R e p a i r a short to g r o u n d in the w i r e between
PCM connector terminal C9 and the 3rd clutch
transmission fluid pressure s w i t c h , then go to step
14.
NO—Update the PCM if it does not have the latest
software, or substitute a k n o w n - g o o d PCM
(see page 14-7), then recheck. If the s y m p t o m /
indication goes away w i t h a k n o w n - g o o d PCM,
replace the original P C M . H
(cont'd)
14-143