Honda Civic Service Manual page 545

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Fuel Tank Pro3sure sensor 196 D16Y8 engine (coupe).'97 D15Y7 engine {coupe: KL model, sedan: KL
(LX) modeu,'97
D16Y8 engine (coupe: all models, sedan: KL model,
'98-all models) '99 - 00 D16Y5 engine with M/Tl:
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PTANK
{LT GRNI
vcc2
(YEL/BLU}
Wire side oI female terminals
FUEL TANK
PRESSURE SENSOR
3P CONNECTOR (C7921
sG2
IGRN/8LK)
F o c 2 l : : i l " : " t o o l i n d i c a t e s D i a g n o s t i c T r o u b l e c o d e ( D T c ) P 0 4 5 2 : A | o w v o | t a g e p r o b | e m i n t h e F u e | T a n k P r e
The fuel tank pressure sensor converts fuel tank absolute pressure into electrical signals and inputs the
EcM/PCM.
OUTPUT
VOLTAGE
tvt
4.5
-? kPa
(-50 mmHg,
-2 in.Hg)
ECM/PCM CONNECTOR O I16P)
Wire side of female terminals
+7 kPs
150 mmHg,
2 in.Hg)
PRESSURE
(cont'd)
11-275
- The MIL has been reported on
-
DTC P0452 is stored.
Check the vacuum lines:
C h e c k t h e v a c u u m l i n e s o f t h e
fuel tank pressure sensor for mis-
r o u t i n g , l e a k a g e , b r e a k a g e a n d
cloggrng.
Are the vacuum lines OK?
Problem v€ritication:
1. Do the ECM/PCM Reset Proce
dure.
2. Remove the luel fill caP.
3. Turn the ignition switch ON lll)
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/PCM terminal Dl5.
lntermittent tailuro, sYstem i5 OK
dt this timo. Chock for Poot con-
neciion3 or loose wir*
at C131
llocatod under right side ot dashl,
C4O1 (located .bove under'da3h
tuso/ielay box), C574 1C568)*
{located under acc€ss Panell.
C792 lfuel tank pressule sen3or)
and EcM/PCM.
ls there approx. 2.5 V?
Check tol an op€n in wite (VCC2
line):
1. Turn the ignition switch OFF
2. Reinstallthe 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
fuel tank pressure sensor 3P
connector No. l terminal and
No. 2 terminal.
Repair open in the wite between
the fuel tank Pr€s3ure a€n3or and
th6 EcM/PcM (D1ol.
ls there approx. 5 V?
(To page 11'276)