2002 HONDA CIVIC ground

21. Connect PGM-Fl main relay 2 5P connector
terminals No. 1 and No. 2 with a iumDer wire.
PGM.FI MAIN RELAY 25P CONNECTOR
FUELPUMP(YEL/GRN)JUMPERWIRE
22.
23.
Wire side of {emale terminals
Turn the ignition switch ON (ll).
Measure voltage between fuel pump 5P connector
terminal No. 5 and body ground.
FUEL PUMP 5P CONNECTOR
Wire side ol female terminals
ls there battery voltage?
YES Replacethe PGM-Fl main relay2.t
NO-Repair open in the wire between the PGM-Fl
main relay 2 and the fuel pump 5P connector.l
Turn the ignition switch OFF.24.
FNI E
tri dffircr fv{YEL/BLK)
A
25. Check for continuity between fuel pump 5P
connector terminal No. 4 and body ground.
FUEL PUMP 5P CONNECTOR
Wire side of female terminals
ls there continuity?
YES Replace the fuel pump.l
NO-Repair open in the wire between the fuel
pump 5P connector and G551.1
11-143

Fuel Supply System
Fuel Pulsation Damper Replacement
1. Relieve the fuel pressure(seepagell-144).
2. Remove the engine cover.
3. Remove the fuel rail mounting nuts from the fuelrail.
4. Remove the ground cable (G 101.
5. Raise the fuel rail.
6. Place awrench (A) onthefuel rail (B).
7. Place a wrench (C) onthefuel pulsation damper (D).
8. Remove the pulsation damper.
9. Installthe fuel pulsation damper in lhe reverse
order of removal with new washers.
NOTE:. Replace all washers wheneve r the fuel pulsation
damper is loosened or removed,. lf the drain hole (A) ofthefuel pulsationdamper
cover does not face bottom, reinstall it as shown.
11-154

Fuel Supply System
Fuel Gauge Sending Unit Test
Special Tools Required
Fuel sender wrench 07XAA-001010A
NOTE; For the fuel gauge system circuit diagram, referto the Gauges Circuit Diagram (see page 22-58||.
1. Checkthe No. 10 fUETER {7.5A)fuse in the under-
dash fuse/relay box before testing.
2. Do the gauge drive circuit check (see page 22-56|l.
' lf the fuel gauge needle sweeps from minimuni
to maximum position and then returns to the
minimum position. the gauge is OK. Go to step 3.. lf the fuel gau ge need le does not sweep from
minimum to maximum position position and
then return to the minimum position, replace thegauge assembly and retest.
3. Turn the ignition switch OFF.
4. Remove the rear seat cushion {see page 20-80).
5. Remove the access panel (A)from the floor.
6. Disconnect the fuel pump 5P connector {B).
-ztr
11-156
7. Measure voltage between fuel pump 5P connectorterminals No. 1 and No. 2 with the ignition switchON (ll). There should be battery voltage.
. lf the voltage is as specified, go to step 8.. lf the voltage is notasspecified,checkfor:
- an open in the YEUBLK or BLK wire.- poor ground (G551).
FUEL PUMP 5P CONNECTOR
Wire side of female terminals
Turn the ignition switch OFF. Remove the No. 9BACK UP (7.5A)fuse from the under-hood fuse/
relay box for at least 10 seconds, lhen reinstall it.
Install a 2 Q resistor between fuel pump 5P
connector lerminals No. 1 and No. 2, then turn the
ignition switch ON (ll).
FUEL PUMP 5P CONNECTOR
-VVV-
29RESISTOR,
=-a
{Y
\
//,(elrt \
\45/
{YEL/BLK)
Wire side of female terminals

EVAP System
DTC Troubleshooting (cont'd)
DTC P0452: FTP Sensor Circuit Low Voltage
1. Check the vacuum lines at the FTP sensor for
misrouting, leakage. breakage, or clogging.
Are the vacuum lines OK?
YES Go to step 2.
NO Repair or replace vacuum lines as
necessary. I
2. Reset the ECM (see page 11-4).
3. Remove the fuelfill cap.
4. Turn the ignition switch ON (ll)
5. Monitor FTP sensor voltage with the Honda PGM
Tester, or measure voltage between body ground
and ECM connector terminal E14.
ECM CONNECTOR E 131PI
1 2t3t45o/89
././114tc61./182C21
22123241 t26271/ 2931
TP (LT GRN)
Wire side of female terminals
ls thete about 2.5 V?
YES- Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the FTP sensor and at the ECrM.l
NO Go to step 6.
11-172
6. Turn the ignition switch OFF.
7. Reinstallthe fuel fill cap.
8. Disconnect the FTP sensor 3P connector.
9. Turn the ignition switch ON (ll)
10. Measure voltage between FTP sensor 3P connector
terminals No. 1 and No.2.
FUEL TANK PRESSURE SENSOR 3P CONNECTOR
VCgl {YEL/BLU}
Wire side of female terminals
ls there about 5 V?
YES Go to step 1 '1.
NO-Repair open in the wire between the FTP
sensor and the ECM {E5).1

't2.
13.
14.
11. Measure voltage between FTP sensor 3P connector
terminals No. 2 and No.3.
FUELTANK PRESSUBE SENSOR 3P CONNECTOR
FTP (LT GBN)
Wire side of femaleterminals
ls there about 5 V?
YES - Replace the FTP sensor. t
NO-Go to step 12.
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
Wire side of femalelerminats
ls there continuity?
YES Repair short in the wire between the FTP
sensor and the ECI\4 {E14).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/indicationgoes away with a known-good EClvl, replace the
original ECM.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?
YES-Go to step 2.
NO Repair or replace vacuum lines as
necessary.I
2. Reset the ECM {see page 11'4).
3. Remove the fuel fill cap.
4. Turn the ignition switch ON (ll).
5. lvlonitor FTP sensor voltage with the Honda PGM
Tester, or measure voltage between body ground
and ECM connector terminal E'14.
ECM CONNECTOR E 131PI
112134567I9
56/ t182C21
242il./29 3031
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
the FTP sensor and at the ECM.I
NO Go to step 6.
{cont'd)
11-173

EVAP System
DTC Troubleshooting (cont'd)
8. Check for continuity between EVAP canister purge
valve 2P connenctor terminal No. 2 and body
grou no.
EVAP CANISTER PURGEVALVE 2P CONNECTOR
Wire side of female terminals
ls there continuity?
YES Go to step 9.
NO Replace the EVAP canister purge valve.l
Disconnect ECM connector B (24P).
Check for continuity between EVAP canister purge
valve 2P connector terminal No. 2 and body ground.
EVAP CANISTER PURGEVALVE 2P CONNECTOR
PCS{YEL/BLU)
Wire side of female terminals
ls there continuity?
YES Repair short in the wire between the EVAP
canister purge valve and the ECI\4 {821).1
NO Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). lf the symptom/indication
goes away with a known-good ECM, replace the
original ECM.I
9.
10.
12
'.\'
11-176
v
F-
A973X-041-XXXXX
EVAP Bypass Solenoid Valve Test
1 1 , Disconnect both vacuum hoses from the EVAP two
way valve (A), and connect a vacuum pump to the
canister port on the EVAP two way valve.
Turn the EVAP bypass solenoid valve on with the
Honda PGM Tester, or connect ECM connecter
terminal E20 to body ground with a jumper wire.
ECM CONNECTOR E 131P)
12345617l 189
456/ 1182C21
22t2?24z7l./29
JUMPERWIRE
2WBS(BLU/RED}
13.
14.
Wire side of female terminals
Turn the ignition switch ON (ll).
Apply vacuum to the hose.
Does the valve hold vacuum?
YES-Go to step 15,
NO Go to step 20.

15.
to.
Turn the ignition switch OFF.
Disconnect the EVAP bypass solenoid valve 2P
connecror.
Check for continuity between EVAP bypass
solenoid valve 2P connector terminal No. 2 and
body ground.
17.
EVAP BYPASS SOLENOIDVALVE 2P CONNECTOR
'18.
Wire side oI Iemale terminals
ls there continuity?
YES Go to step 18.
NO-Repair open in the wire bet\iveen the EVAP
bypass solenoid valve and the ECM (E20).1
Turn the ignition switch ON (ll).
2
tG'l
'19. Measure voltage between EVAP bypass solenoid
valve 2P connector terminal No. 1 and body ground.
EVAP BYPASS SOLENOIDVALVE 2P CONNECTOR
{BLK/ORN)
Wire side ol lemale terminals
ls there battery voltage?
YES Replace the EVAP two way/bypass solenoid
valve (A).1
NO-Repair open in the wire between the EVAP
bypass solenoid valve and the No. 4 ACG (10A)
fuse.l
{cont'd)
11-177

EVAP System
DTC Troubleshooting (cont'dl
20. Plug the fueltank port (A) oftheEVAPtwoway
valve,
While monitoring FTP sensor voltage with the
Honda PGM Tester, or measuring the voltage
between ECM connector terminals E4 and E 14,
slowly pump the vacuum pump until the voitage
droDS to about 1.5 volts.
ECM CONNECTOR E {31PI
Wire side of female terminals
Does the voltage dtop to 1.5 V and hold fot at
Ieast 20 seconds?
YES-The EVAP bypass solenoid valve/EVAP two
way valve is OK. Go to step 22.
NO Repair the leak from the EVAP bypass
solenoid valve, EVAP two way valve. or
FTP sensor.l
11-178
Wire side of female terminals
EVAP Canister Vent Shut Valve Test
22. Disconnect the vacuum hose from the EVAP
canister vent filter (A), and connect a vacuum pump
to the hose.
Turn the ignitlon switch ON (ll).
Apply vacuum to the hose with five strokes of the
pump.
Does the valve hold vacuum?
YES Go to step 25.
NO The EVAP canister vent shut valve is OK. Go
to step 30.
Turn the ignition switch OFF.
Disconnect the EVAP canister vent shut valve 2P
conneclor.
Check for continuity between EVAP canister vent
shut valve 2P connector terminal No. 2 and body
ground.
EVAP CANISTEB VENT SHUTVALVE 2P CONNECTOR
{LT GRN/REOI
\
25.
26.
21.