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

•
•
•
11. Measure voltage between FTP sensor 3P connector
terminals No.2 and No.3.
FUEL TANK PRESSURE SENSOR 3P CONNECTOR
Wire side of female terminals
Is there about
5
V?
YES-Replace the FTPsensor .•
NO-Go to step 12.
12. Turn the ignition switch OFF.
13. Disconnect ECM connector E (31PI .
14. Check for continuity between FTPsensor3P
connector terminal No.3 and body ground.
FTPSENSOR3PCONNECTOR
Wire side of female terminals
Is there continuity?
YES-Repair short in the wire between the FTP
sensor and the ECM (E14) .•
NO-Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). If the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
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 .•
2. Reset the ECM (see page 11-4).
3. Remove the fuel fill cap.
4. Turn the ignition switch ON (II).
5. Monitor FTP sensor voltage with the Honda PGM
Tester, or measure voltage between body ground
and ECM connector terminal E14.
ECM CONNECTOR E 131 P)
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.
(cont'd)
11-173