Honda 2004 Odyssey Service Manual page 1641

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Climate Control
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 presure 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 the A/C
diode A, the PCM and the A/C pressure switch.
4. Turn the ignition switch OFF.
21-110
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 13.
6. Reconnect the A/C pressure switch 4P connector.
Does the vehicle have a Navigation System?
YES
Go to step 10.
NO
Go to step 7.
7. Disconnect climate control unit connector B (20P).
8. Turn the ignition switch ON (II).

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