Ftp Sensor Circuit Low Voltage - Honda Civic 2002-2003 Service Manual

EVAPSystem
OTe Troubleshooting (cont'd)
OTe 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 .•
2. Resetthe ECM (see page 11-41.
3. Remove the fuel fill cap.
4. Turn the ignition switch ON (III.
5. Monitor FTPsensorvoltagewiththe Honda PGM
Tester, or measure voltage between body ground
and ECM connector terminal E14.
ECM CONNECTOR E 13lPI
=
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 .•
NO-Go to step 6.
11-172
6. Turn the ignition switch OFF.
7. Reinstall the fuel fill cap.
8. Disconnect the FTP sensor 3P connector.
9. Turn the ignition switch ON III).
10. Measure voltage between FTPsensor3Pconnector
terminals No.1 and No.2.
FUEL TANK PRESSURE SENSOR 3P CONNECTOR
SG3IPNK}
Wire side of female terminals
Is there about 5 V?
YES-Go to step 11.
NO-Repair open in the wire between the FTP
sensor and the ECM (E51 .•
,