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Honda Odyssey 2004. Manual - part 142

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DTC P0453

’99-00, ’02-04 Models:

YES

11-266

EVAP System

DTC Troubleshooting (cont’d)

PCM CONNECTOR A (32P)

FTP (LT GRN)

FTP SENSOR 3P CONNECTOR

VCC2 (YEL/BLU)

SG2 (GRN/BLK)
SG2 (GRN/YEL)*

FTP

Sensor Circuit High Voltage

NOTE: Information marked with an asterisk ( ) applies
to ’02-04 models.

1. Check the vacuum lines of 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 (C18).

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 09:26:02 61S0X050_110_0266

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YES

DTC P0453

’01 Model:

11-267

SG2 (GRN/BLK)

FTP SENSOR 3P CONNECTOR

FTP (LT GRN)

SG2 (GRN/YEL)*

PCM CONNECTORS

SG2 (GRN/BLK)

A (32P)

FTP (LT GRN)

C (31P)

SG2 (GRN/YEL)*

PCM CONNECTOR E (31P)

FTP (LT GRN)

11. Measure voltage between FTP sensor 3P connector

terminals No. 2 and No. 3.

Replace the FTP sensor.

Go to step 12.

12. Measure voltage between PCM connector

terminals A29 and C18.

Repair open 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 of 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.

(cont’d)

FTP Sensor Circuit

High Voltage

Wire side of female terminals

Is ther e about 5 V ?

Ar e the vacuum lines OK ?

Is ther e about 2.5 V ?

03/07/29 09:26:03 61S0X050_110_0267

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YES

11-268

EVAP System

DTC Troubleshooting (cont’d)

FTP SENSOR 3P CONNECTOR

VCC3 (YEL/BLU)

SG3 (GRN/BLK)

FTP SENSOR 3P CONNECTOR

FTP (LT GRN)

SG3 (GRN/BLK)

PCM CONNECTOR E (31P)

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 (E7).

11. Measure voltage between FTP sensor 3P connector

terminals No. 2 and No. 3.

Replace the FTP sensor.

Go to step 12.

12. Measure voltage between PCM connector

terminals E7 and E28.

Repair open 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

Is ther e about 5 V ?

03/07/29 09:26:03 61S0X050_110_0268

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DTC P1456

’99-00 Models:

Special Tools Required

Fuel Fill Cap Check

YES

EVAP Purge Control Solenoid Valve Test

YES

11-269

A973X-
041-XXXXX

EVAP Control

System Leakage (fuel tank system)

The fuel system is designed to allow specified
maximum vacuum and pressure conditions. Do not
deviate from the vacuum and pressure tests as
indicated in these procedures. Excessive pressure/
vacuum would damage the EVAP components or cause
eventual fuel tank failure.

Vacuum Pump/Gauge, 0

30 in.Hg A973X-041-XXXXX

NOTE: If DTC P0461 is stored at the same time as DTC
P1456, troubleshoot P0461 first, then recheck for DTC
P1456.

This is a two trip code; once cleared, it cannot be
reproduced in one trip. Also, certain specific driving
and ambient conditions must occur before the PCM will
complete the system checks. Additional test drives may
still not meet the specific conditions needed to
reproduce the code.

Follow these troubleshooting procedures carefully to
ensure the integrity of the system and to confirm the
cause of the problem or code.

NOTE: Fresh fuel has a higher volatility that will create
greater pressure/vacuum. The optimum condition for
testing is fresh fuel and less than a full tank of gas. If
possible, to assist in leak detection, add 1 gallon of
fresh fuel to the tank (as long as it will not fill the tank),
just before starting these procedures.

1. Check the fuel fill cap. It must say ‘‘If not tightened

3 clicks engine light may come on.’’

Go to step 2.

Replace or tighten the cap.

2. Check the fuel fill cap seal.

Replace the fuel fill cap (gray or black

colored cap).

The fuel fill cap is OK. Go to step 3.

3. Disconnect the vacuum hose from the EVAP purge

control solenoid valve (A), and connect a vacuum
pump to the hose.

4. Turn the ignition switch ON (II).

5. Apply vacuum to the hose.

The EVAP purge control solenoid valve is OK.

Go to step 11.

Go to step 6.

6. Turn the ignition switch OFF.

7. Disconnect the EVAP purge control solenoid valve

2P connector.

(cont’d)

Is the cor r ect f uel f ill cap installed and pr oper ly
tightened?

Is the f uel f ill cap seal missing or damaged?

Does the valve hold vacuum?

03/07/29 09:26:04 61S0X050_110_0269

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