Honda 2004 Odyssey Service Manual page 1644

8. Disconnect climate control unit connector B (26P).
9. Turn the ignition switch ON (II).
10. Measure the voltage between the No. 13 terminal
of climate control unit connector B (26P) and body
ground.
CLIMATE CONTROL UNIT CONNECTOR B (26P)
Wire side of female terminals
Is there battery voltage?
YES Go to step 11.
NO Repair open in the wire between the No. 3
fuse in the driver's under-dash fuse/relay box and
the climate control unit.
11. Turn the ignition switch OFF.
12. Check for continuity between the No. 15 terminal of
climate control unit connector B (26P) and body
ground.
BLK/YEL
Is there continuity?
YES
climate control unit connector B (26P). If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.
NO
climate control unit and body ground. If the wire is
OK, check for poor ground at G401.
CLIMATE CONTROL UNIT CONNECTOR B (26P)
BLK
Wire side of female terminals
Check for loose wires or poor connections at
Check for an open in the wire between the
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