Acura Integra 1998 Service Manual page 349

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Emission Control System
Evaporative Emission (EVAPI Controls (cont'd)
Fuel Tank Pre$ure sensor
The scan tool indicates Diagnostic Trouble Code (DTC) P0453: A high voltage problem in the Fuel Tank Pressure
sensor.
ECM OONNECTOR D IT6PI
PTANK
ILT GRNI
Wire side of female terminals
FUEL TANK
PRESSURE SENSOR
3P CONNECTOR {C7921
\
voc2
{YEL/BLU}
sG2
IGBN/BI.KI
Wire side of female terminals
The Mll- hes bson.opofiad on.
DTC m453 b stored.
Check ihe vacuum lino3:
C h e c k t h e v a c u u m I i n e s o t t h e
{uel tank pressure sensor for mis-
routing, leakage, breakage and
croggrng.
Are the vacu!m lin€s OK?
Problem vsrification:
1. Do the ECM Reset Procedure.
2. Remove the fuel fill cap.
3. Turn the ignition switch ON {ll).
4. Monitor the FTP sensor volt-
a g e w i t h t h e H o n d a P G M
T e s t e r , o r m e a s u r e v o l t a g e
b e t w e e n b o d y g r o u n d a n d
ECM connector terminal D15.
Intormittont failu.e. syst6m is OK
at ihi3 time, Chack for poor con.
nections or loo3e wires at C421
{locatod abovo undel-dash fu3e/
rolay box), C510 (loc.ted undor
acc6s3 Dan6ll, C792 Ituol trnk
Dro.su.6 sen3or l and ECM,
ls there approx. 2.5 V?
Check tor an open in the wire
(SG2 lino):
1. Turn the ignition switch OFF.
2. Reinstall the fuel fill cap.
3. Disconnect the fuel tank pres-
sure sensor 3P connector.
4. Turn the ignition switch ON {ll}.
5. Measure voltage between the
tuel tank pressure sensor 3P
connector terminals No. 1 and
N o . 2 .
Rcpair opon in the wire b6tw66n
the fu6l tank prasSuaa 36n3or end
ECM {Dr1).
ls there approx. 5 V?
Check lor a short in tho wirc
{PTANK linel:
M e a s u r e v o l t a g e b e t w e e n t h e
fueltank pressure sensor 3P con-
nector terminals No. 2 and No. 3.
YES
sG2
IGRN/BLKI
PTANK
ILT GRNI
{To page 1l-145)
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