Honda 2004 Odyssey Service Manual page 1642

9. Measure the voltage between the No. 2 terminal of
climate control unit connector B (20P) and body
ground.
CLIMATE CONTROL UNIT CONNECTOR B (20P)
RED/WHT
Wire side of female terminals
Is there battery voltage?
YES Check for loose wires or poor connections at
climate control unit connector B (20P) and at the
A/C pressure switch 4P connector. 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 Repair open in the wire between the climate
control unit and the A/C pressure switch.
10. Disconnect climate control unit connector B (26P).
11. Turn the ignition switch ON (II).
12. Measure the voltage between the No. 4 terminal of
climate control unit connector B (26P) and body
ground.
CLIMATE CONTROL UNIT CONNECTOR B (26P)
RED/WHT
Wire side of female terminals
Is there battery voltage?
YES Check for loose wires or poor connections at
climate control unit connector B (26P) and at the
A/C pressure switch 4P connector. 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 Repair open in the wire between the climate
control unit and the A/C pressure switch.
13. Check for proper A/C system pressure.
Is the pressure within specif ications?
YES Replace the A/C pressure switch.
NO Repair the A/C pressure problem.
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