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Honda Odyssey 2004. Manual - part 129

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11-214

Fuel Supply System

PGM-FI Main Relay Circuit Troubleshooting (cont’d)

PCM CONNECTORS

A (31P)

E (31P)

PG1 (BLK)

IMOFPR
(GRN/YEL)

No. 1

No. 2

No. 3

No. 4

No. 5

No. 6

No. 7

To IGN. 1

To GROUND

To ST. SWITCH

To PCM
(E1)

To FUEL PUMP

To PCM
(A2, A3)

To BAT (

)

16. Turn the ignition switch OFF, then ON (II) again.

17. Measure voltage between PCM connector

terminals A5 and E1 within the first 2 seconds after
the ignition switch is turned ON (II).

The PGM-FI main relay may be faulty. Go to

step 18.

Substitute a known-good PCM and recheck

(see page 11-5). If the prescribed voltage is now
available, replace the original PCM.

18. Remove the PGM-FI main relay.

19. Connect battery power to PGM-FI main relay 7P

connector terminal No. 2, and connect PGM-FI
main relay 7P connector terminal No. 1 to ground.
Then check for continuity between PGM-FI main
relay 7P connector terminals No. 5 and No. 4.

NOTE: Use the terminal numbers shown. Ignore
the terminal numbers molded into the relay.

Go to step 20.

20. Connect battery power to PGM-FI main relay 7P

connector terminal No. 5, and connect PGM-FI
main relay 7P connector terminal No. 3 to ground.
Then check for continuity between PGM-FI main
relay 7P connector terminals No. 7 and No. 6.

Go to step 21.

Replace the PGM-FI main relay and retest.

21. Connect battery power to PGM-FI main relay 7P

connector terminal No. 6, and connect ground to
PGM-FI main relay 7P connector terminal No. 1.
Then check for continuity between PGM-FI main
relay 7P connector terminals No. 5 and No. 4.

The PGM-FI main relay is OK.

Replace the PGM-FI main relay and retest.

Wire side of female terminals

Is ther e 1.0 V or less?

Is ther e continuity?

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Replace the PGM-FI main relay and retest.

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11-215

Fuel Pressure Relieving

A
22 N·m
(2.2 kgf·m, 16 lbf·ft)

Before disconnecting fuel lines or hoses, relieve
pressure from the system by loosening the fuel
pulsation damper on top of the fuel rail.

1. Make sure you have the anti-theft codes for the

radio and the navigation system (if equipped), then
write down the frequencies for the radio’s preset
buttons.

2. Disconnect the negative cable from the battery.

3. Remove the fuel fill cap.

4. Place a wrench on the fuel pulsation damper (A).

5. Place a rag or shop towel (B) over the fuel pulsation

damper.

6. Slowly loosen the fuel pulsation damper one

complete turn.

NOTE: Replace all washers whenever the fuel
pulsation damper is loosened or removed.

*: The illustration shows ’99-01 models.

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Special Tools Required

’99-01 models

’02-04 models

11-216

Fuel Supply System

Fuel Pressure Test

A
22 N·m
(2.2 kgf·m, 16 lbf·ft)

07VAJ-0040100

07406-004000A

07406-0040001

• Fuel pressure gauge 07406-004000A
• Fuel pressure gauge attachment 07VAJ-0040100

1. Make sure you have the anti-theft codes for the

radio and the navigation system (if equipped), then
write down the frequencies for the radio’s preset
buttons.

2. Disconnect the negative cable from the battery.

3. Remove the fuel fill cap.

4. Place a wrench on the fuel pulsation damper (A) at

the fuel rail.

5. Place a rag or shop towel (B) over the fuel pulsation

damper.

6. Slowly loosen the fuel pulsation damper one

complete turn.

7. Remove the fuel pulsation damper from its fitting,

and attach the fuel pressure gauge attachment.

8. Attach the fuel pressure gauge.

9. ’99-01 models:

Disconnect the vacuum hose (A) of the fuel
pressure regulator, and pinch it closed with a
clamp (B). (’99-01 models)

10. Reconnect the negative cable to the battery, then

start the engine and let it idle.

• If the engine starts, go to step 12 (’99-01 models)

or step 16 (’02-04 models).

• If the engine does not start, go to step 11.

11. Check to see if the fuel pump is running: listen to

the injector rails underneath the intake manifold
cover while an assistant turns the ignition switch
ON (II). You should hear the fuel flow through the
injector rails for about 2 seconds when the ignition
turned ON (II).

• If the pump runs, go to step 12 (’99-01 models) or

step 16 (’02-04 models).

• If the pump does not run, test the fuel pump (see

page 11-218).

*: The illustration shows ’99-01 models.

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11-217

12. ’99-01 models:

Read the pressure gauge (with the fuel pressure
regulator vacuum hose disconnected and clamped).
The pressure should be 300

340 kPa (3.0

3.5

kgf/cm , 43

49 psi).

• If the pressure is OK and engine is running, go to

step 13. If not running, repair the cause, then
continue this test.

• If the pressure is out of spec, go to step 14.

13. ’99-01 models:

With the engine running, reconnect the vacuum
hose and read the gauge again. The pressure
should be 240

300 kPa (2.5

3.0 kgf/cm , 36

psi).

• If the fuel pressure is OK, the test is complete. Go

to step 15.

• If the pressure is out of spec, go to step 14.

14. ’99-01 models:

Disconnect the vacuum hose from the pressure
regulator again while you watch the pressure
gauge. The pressure should increase when you
disconnect the hose.

• If the pressure did not increase, replace the fuel

pressure regulator (see page 11-227) and recheck
the fuel pressure.

• If the pressure increased, and all your readings

were within spec, go to step 15.

• If the pressure increased, but your readings were

out of spec, check for these problems:

– If the pressure is too low, check for a clogged

fuel filter and for leaks in the fuel lines.

– If the pressure is too high, check for a pinched

or clogged fuel return hose or line.

– Fuel rail restrictions

15. ’99-01 models:

Reconnect the vacuum hose, remove the pressure
gauge, and reinstall the fuel pulsation damper with
a new washer. Tighten the fuel pulsation damper to
22 N·m (2.2kgf·m, 16 lbf·ft).

NOTE: Disassemble and clean the fuel pressure
gauge attachment thoroughly after use.

16. ’02-04 models:

Read the pressure gauge. The pressure should be
290

330 kPa (2.9

3.4 kgf/cm , 42

48 psi).

• If the pressure is OK and engine is running, the

test is complete. If the engine is not running,
repair the cause, then continue this test.

• If the pressure is too high, check for a pinched or

clogged fuel return hose or line.

• If the pressure is too low, check for a clogged fuel

filter and for leaks in the fuel lines.

• If the pressure is out of spec and the fuel lines are

OK, replace the pressure regulator
(see page 11-228).

17. ’02-04 models:

Remove the pressure gauge, and reinstall the fuel
pulsation damper with a new washer. Tighten the
fuel pulsation damper to 22 N·m (2.2kgf·m, 16 lbf·ft).

NOTE: Disassemble and clean the fuel pressure
gauge attachment thoroughly after use.

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