Honda 2004 Odyssey Service Manual page 520

15. Measure voltage between PCM connector
terminals B1 and B2, and between B9 and B2.
PCM CONNECTOR B (25P)
IGP1 PG1 (BLK)
(YEL/BLK)
IGP2
(YEL/BLK)
Wire side of female terminals
Is there battery voltage?
YES Go to step 16.
NO Check for an open in the wires between the
PGM-FI main relay and the PCM (B1, B9). If the
wires are OK, replace the PGM-FI main relay.
16. Turn the ignition switch OFF, then ON (II) again.
17. Measure voltage between PCM connector
terminals A15 and B2 within the first 2 seconds
after the ignition switch is turned ON (II).
PCM CONNECTORS
A (32P)
IMOFPR (GRN/YEL)
PG1 (BLK)
Wire side of female terminals
Is there 1.0 V or less?
YES The PGM-FI main relay may be faulty. Go to
step 18.
NO 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.
B (25P)
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.
No. 1
No. 4
No. 5 No. 6 No. 7
To IGN. 1
To GROUND
To ST. SWITCH
To PCM
(A15)
Is there continuity?
YES Go to step 20.
NO Replace the PGM-FI main relay and retest.
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.
Is there continuity?
YES Go to step 21.
NO 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.
Is there continuity?
YES The PGM-FI main relay is OK.
NO Replace the PGM-FI main relay and retest.
No. 2
No. 3
To BAT ( )
To PCM
(B1, B9)
To FUEL PUMP
11-211