Dtc P0453: Ftp Sensor Circuit High Voltage - Honda EP3 Service Manual

' t 2 .
1 3 .
1 4 .
11. Measure voltage between FTP sensor 3P connector
t e r m i n a l s N o . 2 a n d N o . 3 .
FUELTANK PRESSUBE SENSOR 3P CONNECTOR
FTP (LT GBN)
W i r e s i d e o f f e m a l e t e r m i n a l s
ls there about 5 V?
YES - Replace the FTP sensor. t
N O - G o t o s t e p 1 2 .
Turn the ignition switch OFF.
Disconnect ECM connector E (31P),
Check for continuity between FTP sensor 3P
connector terminal No. 3 and body ground.
FTP SENSOR 3P CONNECTOB
FTP (LT GRNI
W i r e s i d e o f f e m a l e l e r m i n a t s
ls there continuity?
YES Repair short in the wire between the FTP
s e n s o r a n d t h e E C I \ 4 { E 1 4 ) . I
NO-Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 1 1-6). lf the symptom/indication
goes away with a known-good EClvl, replace the
o r i g i n a l E C M . I
DTC P0453: FTP Sensor Circuit High Voltage
1. Check the vacuum lines at the FTP sensor for
misrouting, leakage, breakage, or clogging.
Are the vacuum lines OK?
Y E S - G o t o s t e p 2 .
N O R e p a i r o r r e p l a c e v a c u u m l i n e s a s
necessary.I
2 . R e s e t t h e E C M { s e e p a g e 1 1 ' 4 ) .
3. Remove the fuel fill cap.
4 . T u r n t h e i g n i t i o n s w i t c h O N ( l l ) .
5. lvlonitor FTP sensor voltage with the Honda PGM
Tester, or measure voltage between body ground
a n d E C M c o n n e c t o r t e r m i n a l E ' 1 4 .
ECM CONNECTOR E 131PI
1 1 2 1 3
4
5
6 7
I
9
5 6 / t18
2C
21
24
2il./
29 30 31
TP {LT GRN}
Wire side of female terminals
Is there about 2.5 V?
YES Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
t h e F T P s e n s o r a n d a t t h e E C M . I
NO Go to step 6.
{cont'd)
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