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Honda Odyssey 2004. Manual - part 148

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１１

YES

Canister System Leak Test

11-290

EVAP System

DTC Troubleshooting (cont’d)

EVAP CANISTER VENT
SHUT VALVE 2P CONNECTOR

IG1 (BLK/YEL)

A973X-041-XXXXX

A973X-041-
XXXXX

25. Turn the ignition switch ON (II).

26. Measure voltage between EVAP canister vent shut

valve 2P connector terminal No. 1 and body ground.

Replace the EVAP canister vent shut valve

(A) and O-ring (B).

Repair open in the wire between the EVAP

canister vent shut valve and No. 6 ECU (PCM)
CRUISE CONTROL (15A) fuse.

27. Turn the ignition switch OFF.

28. Connect 2 three-way T-fittings (A) into the hose

from the EVAP canister to the EVAP two way valve.
Connect the FTP sensor to one of the T-fittings and
the vacuum pump to the other.

29. Remove the vent hose from the EVAP canister vent

shut valve (A) and cap the port (B) to seal the fresh
air vent of the EVAP canister.

30. Turn the ignition switch ON (II).

31. While monitoring FTP sensor voltage with the HDS,

or measuring voltage between PCM connector
terminals E7 and E28, slowly pump the vacuum
pump every 1

2 seconds.

32. Continue to pump vacuum until the voltage drops

to about 1.5 V. Make sure that the engine coolant
temperature is still above 95°F (35°C) and your
vacuum pump has no leak.

Wire side of female terminals

Is ther e batter y voltage?

03/07/29 09:26:23 61S0X050_110_0290

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11-291

A973X-041-
XXXXX

A973X-041-XXXXX

33. Monitor the voltage for 20 seconds.

Inspect the EVAP canister vent shut valve

line and connections.

Go to step 34.

34. Turn the ignition switch OFF.

35. Disconnect the fuel tank vapor vent tube (A) from

the canister at the metal line and plug the hose (B).

36. Turn the ignition switch ON (II).

37. While monitoring FTP sensor voltage with the HDS,

or while measuring voltage between PCM
connector terminals E7 and E28, slowly pump the
vacuum pump every 1

2 seconds.

38. Continue to pump vacuum until the voltage drops

to about 1.5 V. Make sure that the engine coolant
temperature is still above 95°F (35°C) and your
vacuum pump does not have a leak.

39. Monitor the voltage for 20 seconds.

Check the fuel tank vapor control line and

connections for misrouting, poor connections,
damage, or pinched areas. If the line and
connections are OK, replace the fuel tank vapor
control valve.

Go to step 40.

40. Turn the ignition switch OFF.

41. Disconnect the purge line hose (A) from the

canister at the metal line, and plug the hose (B).

42. Turn the ignition switch ON (II).

43. While monitoring FTP sensor voltage with the HDS,

or while measuring voltage between PCM
connector terminals E7 and E28, slowly pump the
vacuum pump every 1

2 seconds.

44. Continue to pump vacuum until the voltage drops

to about 1.5 V. Make sure that the engine coolant
temperature is still above 95°F (35°C) and your
vacuum pump does not have a leak.

45. Monitor the voltage for 20 seconds.

Inspect the EVAP canister purge valve line

and connections. If they are OK, do the EVAP two
way valve test (see page 11-297). If the line, the
connections, and the EVAP two way valve are OK,
replace the EVAP canister purge valve.

Replace the EVAP canister.

Does the voltage dr op to 1.5 V and hold f or at
least 20 seconds?

03/07/29 09:26:23 61S0X050_110_0291

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DTC P1457

’02-04 Models:

Special Tools Required

EVAP Canister Purge Valve Test

YES

11-292

EVAP System

DTC Troubleshooting (cont’d)

A973X-041-
XXXXX

PCM CONNECTOR A (32P)

JUMPER WIRE

PCS (RED/YEL)

EVAP CANISTER PURGE
VALVE 2P CONNECTOR

PCS (RED/YEL)

EVAP Control

System Leakage (EVAP canister 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 system failure.

Vacuum pump/gauge, 0

30 in.Hg A973X-041-XXXXX

NOTE: If DTC P0461 is stored at the same time as DTC
P1457, troubleshoot P0461 first, then recheck for DTC
P1457.

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. Use the test drive procedures for
setting the readiness code (see page 11-89).

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 high volatility that creates
greater pressure/vacuum. The optimum condition for
testing is fresh fuel, and there must be less than a full
tank of fuel. 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. Disconnect the vacuum hose from the EVAP

canister purge valve (A), and connect a vacuum
pump to the hose.

2. Turn the EVAP canister purge valve on with the

HDS, or connect PCM connector terminal A6 to
body ground with a jumper wire.

3. Turn the ignition switch ON (II).

4. Apply vacuum to the hose.

Go to step 5.

The EVAP canister purge valve is OK. Go to

step 10.

5. Turn the ignition switch OFF.

6. Disconnect the EVAP canister purge valve 2P

connector.

7. Check for continuity between EVAP canister purge

valve 2P connector terminal No. 2 and body ground.

Go to step 8.

Repair open in the wire between the EVAP

canister purge valve and the PCM (A6).

Wire side of female terminals

Does the valve hold vacuum?

Is ther e continuity?

03/07/29 09:26:24 61S0X050_110_0292

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YES

EVAP Bypass Solenoid Valve Test

YES

11-293

EVAP CANISTER PURGE
VALVE 2P CONNECTOR

IG1 (BLK/YEL)

A973X-041-
XXXXX

EVAP BYPASS SOLENOID
VALVE 2P CONNECTOR

2WBS (BLU)

8. Turn the ignition switch ON (II).

9. Measure voltage between EVAP canister purge

valve 2P connector terminal No. 1 and body ground.

Replace the EVAP canister purge valve.

Repair open in the wire between the EVAP

canister purge valve and No. 6 ECU (PCM) CRUISE
CONTROL (15A) fuse.

10. Disconnect the vacuum hose from the EVAP two

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

11. Turn the ignition switch ON (II).

12. Apply vacuum to the hose.

EVAP bypass solenoid valve/EVAP two way

valve is OK. Go to step 18.

Go to step 13.

13. Turn the ignition switch OFF.

14. Disconnect the EVAP bypass solenoid valve 2P

connector.

15. Check for continuity between EVAP bypass

solenoid valve 2P connector terminal No. 2 and
body ground.

Go to step 16.

Replace the EVAP bypass solenoid valve (A)

and O-rings (B).

(cont’d)

Wire side of female terminals

Is ther e batter y voltage?

Does the valve hold vacuum?

Is ther e continuity?

03/07/29 09:26:25 61S0X050_110_0293

Content .. 146 147 148 149 ..