Honda 2004 Odyssey Service Manual page 1566

A/C Pressure Switch Circuit Troubleshooting
NOTE:
• Do not use this troubleshooting procedure if any of
the following items are operative; condenser fan,
radiator fan, A/C compressor, or if the heater is
inoperative. Refer to the symptom troubleshooting
index.
• Before performing symptom troubleshooting, check
for powertrain DTCs (see page 11-3).
1. Disconnect the A/C pressure switch 4P connector.
2. Turn the ignition switch ON (II).
3. Measure the voltage between the No. 1 terminal of
the A/C pressure switch 4P connector and body
ground.
A/C PRESSURE SWITCH 4P CONNECTOR
BLU/RED
Wire side of female terminals
Is there battery voltage?
YES Go to step 4.
NO Repair open in the wire between A/C diode A,
the PCM and the A/C pressure switch.
4. Turn the ignition switch OFF.
5. Check for continuity between the No. 1 and No. 4
terminals of the A/C pressure switch.
A/C PRESSURE SWITCH
Is there continuity?
YES Go to step 6.
NO Go to step 16.
6. Reconnect the A/C pressure switch 4P connector.
7. Disconnect the heater control panel 22P connector.
8. Turn the ignition switch ON (II).
9. Measure the voltage between the No. 5 terminal of
the heater control panel 22P connector and body
ground.
HEATER CONTROL PANEL 22P CONNECTOR
RED/WHT
Wire side of female terminals
Is there battery voltage?
YES Go to step 10.
NO Repair open in the wire between the heater
control panel and the A/C pressure switch.
10. Turn the ignition switch OFF.
(cont'd)
21-35