Honda Odyssey 2004. Manual — part 407
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14
*13
YES
NO
YES
NO
21-104
Climate Control
DTC Troubleshooting (cont’d)
CLIMATE CONTROL UNIT CONNECTOR A (8P)
BLU/ORN
BLU/ORN
BLOWER MOTOR HIGH RELAY
5P CONNECTOR
CLIMATE CONTROL UNIT CONNECTOR A (16P)
BLOWER MOTOR HIGH RELAY 5P CONNECTOR
BLU/ORN
BLU/ORN
34. Disconnect climate control unit connector A (8P).
35. Check for continuity between the No. 4 terminal of
climate control unit connector A (8P) and the No. 3
terminal of the blower motor high relay 5P
connector.
Check for loose wires or poor connections at
climate control unit connector A (8P) and at the
blower motor high relay 5P 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.
Repair open in the wire between the climate
control unit and the blower motor high relay.
36. Disconnect climate control unit connector A (16P).
37. Check for continuity between the No. 9 terminal of
climate control unit connector A (16P) and the No. 3
terminal of the blower motor high relay 5P
connector.
Check for loose wires or poor connections at
climate control unit connector A (16P) and at the
blower motor high relay 5P 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.
Repair open in the wire between the climate
control unit and the blower motor high relay.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e continuity?
03/07/29 10:13:28 61S0X050_210_0105
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*11
*12
12
YES
NO
YES
NO
YES
NO
YES
NO
21-105
BLOWER MOTOR 2P CONNECTOR
YEL/BLK
BLOWER MOTOR RELAY 4P SOCKET
BLOWER MOTOR RELAY 4P SOCKET
BLK/YEL
38. Disconnect the jumper wire.
39. Disconnect the blower motor 2P connector.
40. Measure the voltage between the No. 1 terminal of
the blower motor 2P connector and body ground.
Replace the blower motor.
Go to step 41.
41. Turn the ignition switch OFF.
42. Remove the blower motor relay from the under-
hood fuse/relay box, and test it (see page 22-88).
Go to step 43.
Replace the blower motor relay.
43. Measure the voltage between the No. 4 terminal of
the blower motor relay 4P socket and body ground.
Go to step 44.
Replace the under-hood fuse/relay box.
44. Turn the ignition switch ON (II).
45. Measure the voltage between the No. 1 terminal of
the blower motor relay 4P socket and body ground.
Go to step 46.
Repair open in the wire between the No. 3
fuse in the driver’s under-dash fuse/relay box and
the blower motor relay.
(cont’d)
Wire side of female terminals
Is ther e battey voltage?
Is the r elay OK ?
Is ther e batter y voltage?
Is ther e batter y voltage?
03/07/29 10:13:29 61S0X050_210_0106
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13
*01
S0X4A10G10500024712FAAT00
YES
NO
YES
NO
YES
NO
21-106
21-106
Climate Control
DTC Troubleshooting (cont’d)
ECT Sensor Circuit Troubleshooting
BLOWER MOTOR RELAY 4P SOCKET
BLK
CLIMATE CONTROL UNIT CONNECTOR A (8P)
RED/WHT
46. Turn the ignition switch OFF.
47. Check for continuity between the No. 2 terminal of
the blower motor relay 4P socket and body ground.
Repair open in the YEL/BLK wire between the
blower motor relay and the blower motor.
Check for an open in the wire between the
blower motor relay and body ground. If the wire is
OK, check for poor ground at G201.
NOTE: Before performing symptom troubleshooting,
check for powertrain DTCs (see page 11-3).
1. Check the malfunction indicator lamp (MIL).
Refer to the powertrain DTCs
(see page 11-3).
• Without Navigation System: Go to step 2.
• With Navigation System: Go to step 7.
2. Turn the ignition switch OFF.
3. Disconnect the ECT sensor 2P connector.
4. Disconnect climate control unit connector A (8P).
5. Turn the ignition switch ON (II).
6. Measure the voltage between the No. 3 terminal of
climate control unit connector A (8P) and body
ground.
Check for loose wires or poor connections at
climate control unit connector A (8P) and at the ECT
sensor 2P 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.
Repair open in the wire between the climate
control unit and the ECT sensor.
Wire side of female terminals
Is ther e continuity?
Does the malf unction indicator lamp come on?
Is ther e about 5 V ?
03/07/29 10:13:29 61S0X050_210_0107
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*02
*01
S0X4A10G24100050602FAAT20
YES
NO
YES
NO
YES
NO
YES
NO
21-107
21-107
Recirculation Control Motor Circuit
Troubleshooting
CLIMATE CONTROL UNIT CONNECTOR B (26P)
RED/WHT
BLK/YEL
RECIRCULATION CONTROL MOTOR
7P CONNECTOR
7. Turn the ignition switch OFF.
8. Disconnect the ECT sensor 2P connector.
9. Disconnect climate control unit connector B (26P).
10. Turn the ignition switch ON (II).
11. Measure the voltage between the No. 22 terminal
of climate control unit connector B (26P) and body
ground.
Check for loose wires or poor connections at
climate control unit connector B (26P) and at the
ECT sensor 2P 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.
Repair open in the wire between the climate
control unit and the ECT sensor.
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. Disconnect the recirculation control motor 7P
connector.
3. Turn the ignition switch ON (II).
4. Measure the voltage between the No. 1 terminal of
the recirculation control motor 7P connector and
body ground.
Go to step 5.
Repair open in the wire between the
recirculation control motor and the No. 3 fuse in the
driver’s under-dash fuse/relay box.
5. Turn the ignition switch OFF.
6. Test the recirculation control motor (see page 21-
39).
• Without Navigation System: Go to step 7.
• With Navigation System: Go to step 12.
Go to step 17.
7. Disconnect climate control unit connector B (20P).
(cont’d)
Wire side of female terminals
Wire side of female terminals
Is ther e about 5 V ?
Is the f use OK ?
Is ther e batter y voltage?
Is the r ecir culation contr ol motor OK ?
03/07/29 10:13:30 61S0X050_210_0108
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