Honda Odyssey 2004. Manual — part 388
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02
04
*02
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YES
NO
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21-28
Heating/Air Conditioning
Radiator and Condenser Fan Low Speed Circuit Troubleshooting (cont’d)
A/C DIODE A
1
2
1
2
A/C DIODE A 2P SOCKET
GRN
CONDENSER FAN 2P CONNECTOR
BLU/YEL
CONDENSER FAN 2P CONNECTOR
BLU/RED
JUMPER
WIRE
8. Reinstall the condenser fan relay.
9. Remove A/C diode A from the passenger’s under-
dash fuse/relay box.
10. Check for current flow in both directions between
the No. 1 and No. 2 terminals of A/C diode A.
Go to step 11.
Replace A/C diode A.
11. Turn the ignition switch ON (II).
12. Measure the voltage between the No. 2 terminal of
A/C diode A 2P socket and body ground.
Repair open in the wire between A/C diode A
and the A/C pressure switch.
Repair open in the wire between the
condenser fan relay and A/C diode A.
13. Disconnect the jumper wire.
14. Reinstall the condenser fan relay.
15. Disconnect the condenser fan 2P connector.
16. Turn the ignition switch ON (II), then turn the A/C
and fan switches ON.
17. Measure the voltage between the No. 2 terminal of
the condenser fan 2P connector and body ground.
Go to step 18.
Repair open in the wire between the
condenser fan relay and the condenser fan.
18. Turn the A/C and fan switches OFF, then turn the
ignition switch OFF.
19. Reconnect the condenser fan 2P connector.
20. Connect the No.1 terminal of the condenser fan 2P
connector to body ground with jumper wire.
Wire side of female terminals
Wire side of female terminals
Is ther e cur r ent f low in only one dir ection?
Is ther e batter y voltage?
Is ther e batter y voltage?
03/07/29 10:10:27 61S0X050_210_0029
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21-29
FAN CONTROL RELAY 5P SOCKET
BLU/RED
FAN CONTROL RELAY 5P SOCKET
RADIATOR FAN 2P CONNECTOR
BLU/BLK
BLU/BLK
RADIATOR FAN 2P CONNECTOR
BLK
21. Turn the ignition switch ON (II), then turn the A/C
and fan switches ON.
Go to step 22.
Replace the condenser fan motor.
22. Turn the A/C and fan switches OFF, then turn the
ignition switch OFF.
23. Disconnect the jumper wire.
24. Remove the fan control relay from the ABS relay
box, and test it (see page 22-88).
Go to step 25.
Replace the fan control relay.
25. Turn the ignition switch ON (II), then turn the A/C
and fan switches ON.
26. Measure the voltage between the No. 1 terminal of
the fan control relay 5P socket and body ground.
Go to step 27.
Repair open in the wire between the
condenser fan and the fan control relay.
27. Turn the A/C and fan switches OFF, then turn the
ignition switch OFF.
28. Disconnect the radiator fan 2P connector.
29. Check for continuity between the No. 4 terminal of
the fan control relay 5P socket and the No. 2
terminal of the radiator fan 2P connector.
Go to step 30.
Repair open in the wire between the fan
control relay and the radiator fan.
30. Check for continuity between the No. 1 terminal of
the radiator fan 2P connector and body ground.
Replace the radiator fan motor.
Check for an open in the wire between the
radiator fan and body ground. If the wire is OK,
check for poor ground at G201.
Wire side of female terminals
Wire side of female terminals
Does the condenser f an r un?
Is the r elay OK ?
Is ther e batter y voltage?
Is ther e continuity?
Is ther e continuity?
03/07/29 10:10:28 61S0X050_210_0030
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S0X4A00G10110212033FAAT00
YES
NO
YES
NO
YES
NO
YES
NO
21-30
Heating/Air Conditioning
Condenser Fan High Speed Circuit Troubleshooting
FAN CONTROL RELAY 5P SOCKET
BLK/YEL
BLK
FAN CONTROL RELAY 5P SOCKET
NOTE:
• Do not use this troubleshooting procedure if the
radiator fan and/or the compressor is inoperative.
Refer to the symptom troubleshooting index.
• Before performing symptom troubleshooting, check
for powertrain DTCs (see page 11-3).
1. Check the No. 3 (7.5A) fuse in the driver’s under-
dash fuse/relay box.
Go to step 2.
Replace the fuse, and recheck.
2. Remove the fan control relay from the ABS relay
box, and test it (see page 22-88).
Go to step 3.
Replace the fan control relay.
3. Turn the ignition switch ON (II).
4. Measure the voltage between the No. 5 terminal of
the fan control relay 5P socket and body ground.
Go to step 5.
Repair open in the wire between the No. 3
fuse in the driver’s under-dash fuse/relay box and
the fan control relay.
5. Turn the ignition switch OFF.
6. Check for continuity between the No. 2 terminal of
the fan control relay 5P socket and body ground.
Repair open in the wire between the fan
control relay and the radiator fan relay.
Check for an open in the wire between the fan
control relay and body ground. If the wire is OK,
check for poor ground at G201.
Is the f use OK ?
Is the r elay OK ?
Is ther e batter y voltage?
Is ther e continuity?
03/07/29 10:10:28 61S0X050_210_0031
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01
*01
*02
*03
S0X4A00G10110249111FAAT00
YES
NO
YES
NO
YES
NO
YES
NO
21-31
Radiator and Condenser Fan High Speed Circuit Troubleshooting
A/C DIODE C
1
2
1
2
BLU/RED
A/C DIODE C 2P SOCKET
GRN/YEL
A/C PRESSURE SWITCH 4P CONNECTOR
A/C PRESSURE SWITCH 4P CONNECTOR
BLU/RED
BLU/RED
NOTE:
• Do not use this troubleshooting procedure if only one
fan is inoperative, or if the compressor is inoperative.
Refer to the symptom troubleshooting index.
• Before performing symptom troubleshooting, check
for powertrain DTCs (see page 11-3).
1. Remove A/C diode C from the right side of dash.
2. Check for current flow in both directions between
the No. 1 and No. 2 terminals of A/C diode C.
Go to step 3.
Replace A/C diode C.
3. Turn the ignition switch ON (II).
4. Measure the voltage between the No. 2 terminal of
A/C diode C 2P socket and body ground.
Go to step 5.
Repair open in the wire between the radiator
fan relay and A/C diode C.
5. Turn the ignition switch OFF.
6. Reinstall A/C diode C.
7. Disconnect the A/C pressure switch 4P connector.
8. Turn the ignition switch ON (II).
9. Measure the voltage between the No. 2 terminal of
the A/C pressure switch 4P connector and body
ground.
Go to step 10.
Repair open in the wire between A/C diode C
and the A/C pressure switch.
10. Turn the ignition switch OFF
11. Check for continuity between the No. 1 and No. 3
terminals of the A/C pressure switch 4P connector.
Replace the A/C pressure switch.
Repair open in the wire between the A/C
pressure switches A and B.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e cur r ent f low in only one dir ection?
Is ther e batter y voltage?
Is ther e batter y voltage?
Is ther e continuity?
03/07/29 10:10:29 61S0X050_210_0032
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