Honda 2004 Odyssey, Service Manual

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DTC P0451 ’01 Model:
Special Tools Required
YES
NO
YES
NO
11-262
EVAP System
DTC Troubleshooting (cont’d)
FTP (LT GRN)
SG3 (GRN/BLK)
PCM CONNECTOR E (31P)
FTP (LT GRN)
SG3 (GRN/BLK)
PCM CONNECTOR E (31P)
A973X-041-XXXXX
FTP Sensor Range/
Performance Problem
Vacuum pump/gauge, 0 30 in.Hg A973X-041-XXXXX
1. Remove the fuel fill cap.
2. Turn the ignition switch ON (II).
3. Monitor the FTP sensor voltage with the HDS, or
measure voltage between PCM connector
terminals E7 and E28.
Go to step 4.
Replace the FTP sensor.
4. Turn the ignition switch OFF.
5. Disconnect the hose between the EVAP two way
valve and the FTP sensor at the EVAP two way
valve end.
6. Connect a vacuum pump to the open end of the
hose.
7. Turn the ignition switch ON (II).
8. Monitor the FTP sensor voltage with the HDS, or
measure voltage between PCM connector
terminals E7 and E28, and slowly squeeze the
vacuum pump one stroke at a time.
9. The voltage should drop smoothly drop from about
2.5 V down to about 1.5 V. Stop applying vacuum
when the voltage drops to about 1.5 V or damage
to the FTP sensor may occur.
Check for misrouted, leaking, or broken FTP
sensor vacuum lines. If the vacuum lines are OK,
substitute a known-good PCM and recheck (see
page 11-5). If the symptom/indication goes away,
replace the original PCM.
Replace the FTP sensor.
Wire side of female terminals
Wire side of female terminals
Is ther e about 2.5 V ?
Does the voltage dr op to about 1.5 V and hold?
03/07/29 09:26:00 61S0X050_110_0262