Honda 2004 Odyssey Service Manual page 2306

22. Turn the ignition switch OFF.
23. Disconnect SRS floor harness 28P connector (A)
from the SRS main harness connector C851.
A
24. Turn the ignition switch ON (II).
25. Check for voltage between the No. 6 terminal of the
SRS main harness 28P connector and body ground,
and between the No. 15 terminal and body ground.
There should be 0.5 V or less.
SRS MAIN HARNESS 28P CONNECTOR
C851
Is the voltage as specif ied?
YES Short to power in the SRS floor harness;
replace the SRS floor harness.
NO Short to power in the SRS main harness;
replace the SRS main harness.
RED/BLK RED/YEL
Wire side of female terminals
23-241