Honda 2004 Odyssey Service Manual page 572

DTC P0452 '99-00, '02-04 Models:
Sensor Circuit Low Voltage
NOTE: Information marked with an asterisk ( ) applies
to '02-04 models.
1. Check the vacuum lines at the FTP sensor for
misrouting, leakage, breakage, and clogging.
Are the vacuum lines OK ?
YES Go to step 2.
NO Repair or replace vacuum lines as
necessary.
2. Reset the PCM (see page 11-4).
3. Remove the fuel fill cap.
4. Turn the ignition switch ON (II).
5. Monitor FTP sensor voltage with the HDS, or
measure voltage between body ground and PCM
connector terminal A29.
PCM CONNECTOR A (32P)
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 the PCM.
NO Go to step 6.
FTP
FTP (LT GRN)
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 (II).
10. Measure voltage between FTP sensor 3P connector
terminals No. 1 and No. 2.
FTP SENSOR 3P CONNECTOR
VCC2 (YEL/BLU)
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 PCM (C28).
SG2 (GRN/BLK)
SG2 (GRN/YEL)*
(cont'd)
11-263