Honda Odyssey 2004. Manual — part 141
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01
02
01
S0X4AZ1K77100090451FAAT00
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
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01
*01
S0X4AZ6K77100090452FAAT00
DTC P0452
’99-00, ’02-04 Models:
YES
NO
YES
NO
YES
NO
11-263
PCM CONNECTOR A (32P)
FTP (LT GRN)
FTP SENSOR 3P CONNECTOR
VCC2 (YEL/BLU)
SG2 (GRN/BLK)
SG2 (GRN/YEL)*
FTP
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.
Go to step 2.
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.
Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the FTP sensor and the PCM.
Go to step 6.
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.
Go to step 11.
Repair open in the wire between the FTP
sensor and the PCM (C28).
(cont’d)
Wire side of female terminals
Wire side of female terminals
Ar e the vacuum lines OK ?
Is ther e about 2.5 V ?
Is ther e about 5 V ?
03/07/29 09:26:00 61S0X050_110_0263
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*02
04
01
S0X4AZ1K77100090452FAAT00
YES
NO
YES
NO
YES
NO
YES
NO
DTC P0452
’01 Model:
11-264
11-264
EVAP System
DTC Troubleshooting (cont’d)
SG2 (GRN/BLK)
FTP SENSOR 3P CONNECTOR
FTP (LT GRN)
SG2 (GRN/YEL)*
FTP SENSOR 3P CONNECTOR
FTP (LT GRN)
FTP (LT GRN)
PCM CONNECTOR E (31P)
11. Measure voltage between FTP sensor 3P connector
terminals No. 2 and No. 3.
Replace the FTP sensor.
Go to step 12.
12. Turn the ignition switch OFF.
13. Disconnect PCM connector A (32P).
14. Check for continuity between FTP sensor 3P
connector terminal No. 3 and body ground.
Repair short in the wire between the FTP
sensor and the PCM (A29).
Substitute a known-good PCM and recheck
(see page 11-5). If normal voltage is indicated,
replace the original PCM.
1. Check the vacuum lines at the FTP sensor for
misrouting, leakage, breakage, and clogging.
Go to step 2.
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 E28.
Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the FTP sensor and the PCM.
Go to step 6.
FTP Sensor Circuit
Low Voltage
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e about 5 V ?
Is ther e continuity?
Ar e the vacuum lines OK ?
Is ther e about 2.5 V ?
03/07/29 09:26:01 61S0X050_110_0264
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02
03
04
YES
NO
YES
NO
YES
NO
11-265
FTP SENSOR 3P CONNECTOR
VCC3 (YEL/BLU)
SG3 (GRN/BLK)
SG3 (GRN/BLK)
FTP SENSOR 3P CONNECTOR
FTP (LT GRN)
FTP SENSOR 3P CONNECTOR
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.
Go to step 11.
Repair open in the wire between the FTP
sensor and the PCM (E6).
11. Measure voltage between FTP sensor 3P connector
terminals No. 2 and No. 3.
Replace the FTP sensor.
Go to step 12.
12. Turn the ignition switch OFF.
13. Disconnect PCM connector E (31P).
14. Check for continuity between FTP sensor 3P
connector terminal No. 3 and body ground.
Repair short in the wire between the FTP
sensor and the PCM (E28).
Substitute a known-good PCM and recheck
(see page 11-5). If normal voltage is indicated,
replace the original PCM.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e about 5 V ?
Is ther e about 5 V ?
Is ther e continuity?
03/07/29 09:26:02 61S0X050_110_0265
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