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Honda Odyssey 2004. Manual - part 406

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21-100

Climate Control

DTC Troubleshooting (cont’d)

POWER TRANSISTOR 5P CONNECTOR

BLK

BLU/RED

JUMPER WIRE

CLIMATE CONTROL UNIT CONNECTOR A (8P)

ORN/BLK

POWER TRANSISTOR 5P CONNECTOR

CLIMATE CONTROL UNIT CONNECTOR A (8P)

ORN/BLK

4. Connect the No. 4 and No. 5 terminals of the power

transistor 5P connector with a jumper wire.

5. Turn the ignition switch ON (II).

Go to step 6.

Repair open in the wire between the power

transistor and the blower motor.

6. Turn the ignition switch OFF.

7. Disconnect the jumper wire.

Go to step 13.

Go to step 8.

8. Disconnect climate control unit connector A (8P).

9. Check for continuity between the No. 5 terminal of

climate control unit connector A (8P) and the No. 3
terminal of the power transistor 5P connector.

Go to step 10.

Repair open in the wire between the climate

control unit and the power transistor.

10. Check for continuity between the No. 5 terminal of

climate control unit connector A (8P) and body
ground.

Repair short to body ground in the wire

between the climate control unit and the power
transistor.

Go to step 11.

Wire side of female terminals

Does the blower motor r un at high speed?

Does the vehicle have a Navigation System?

Is ther e continuity?

03/07/29 10:13:25 61S0X050_210_0101

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21-101

CLIMATE CONTROL UNIT CONNECTOR A (8P)

BLU/RED

POWER TRANSISTOR 5P CONNECTOR

BLU/RED

CLIMATE CONTROL UNIT CONNECTOR A (8P)

BLU/RED

CLIMATE CONTROL UNIT CONNECTOR B (26P)

POWER TRANSISTOR 5P CONNECTOR

ORN/BLK

CLIMATE CONTROL UNIT CONNECTOR B (26P)

ORN/BLK

11. Check for continuity between the No. 6 terminal of

climate control unit connector A (8P) and the No. 1
terminal of the power transistor 5P connector.

Go to step 12.

Repair open in the wire between the climate

control unit and the power transistor.

12. Check for continuity between the No. 6 terminal of

climate control unit connector A (8P) and body
ground.

Repair short to body ground in the wire

between the climate control unit and the power
transistor.

Go to step 18.

13. Disconnect climate control unit connector B (26P).

14. Check for continuity between the No. 12 terminal of

climate control unit connector B (26P) and the No. 3
terminal of the power transistor 5P connector.

Go to step 15.

Repair open in the wire between the climate

control unit and the power transistor.

15. Check for continuity between the No. 12 terminal of

climate control unit connector B (26P) and body
ground.

Repair short to body ground in the wire

between the climate control unit and the power
transistor.

Go to step 16.

(cont’d)

Wire side of female terminals

Is ther e continuity?

03/07/29 10:13:26 61S0X050_210_0102

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21-102

Climate Control

DTC Troubleshooting (cont’d)

CLIMATE CONTROL UNIT CONNECTOR B (26P)

POWER TRANSISTOR 5P CONNECTOR

BLU/RED

CLIMATE CONTROL UNIT CONNECTOR B (26P)

BLU/RED

BLOWER MOTOR 2P CONNECTOR

BLU/RED

JUMPER
WIRE

16. Check for continuity between the No. 14 terminal of

climate control unit connector B (26P) and the No. 1
terminal of the power transistor 5P connector.

Go to step 17.

Repair open in the wire between the climate

control unit and the power transistor.

17. Check for continuity between the No. 14 terminal of

climate control unit connector B (26P) and body
ground.

Repair short to body ground in the wire

between the climate control unit and the power
transistor.

Go to step 18.

18. Reconnect climate control unit connector A (8P) or

B (26P).

19. Test the power transistor (see page 21-120).

Check for loose wires or poor connections at

climate control unit connector A (8P) or B (26P) and
at the power transistor 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.

Replace the power transistor.

20. Turn the ignition switch OFF, and check the No. 56

(40A) fuse in the under-hood fuse/relay box, and
No. 3 (7.5A) fuse in the driver’s under-dash
fuse/relay box.

Go to step 21.

Replace the fuse(s), and recheck.

21. Connect the No. 2 terminal of the blower motor 2P

connector to body ground with a jumper wire.

22. Turn the ignition switch ON (II).

Go to step 23.

Go to step 38.

Wire side of female terminals

Is ther e continuity?

Is the power tr ansistor OK ?

Ar e the f uses OK ?

Does the blower motor r un?

03/07/29 10:13:27 61S0X050_210_0103

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21-103

BLOWER MOTOR HIGH RELAY
5P CONNECTOR

BLU/RED

JUMPER
WIRE

BLOWER MOTOR HIGH RELAY
5P CONNECTOR

BLK/YEL

BLK

BLOWER MOTOR HIGH RELAY
5P CONNECTOR

23. Turn the ignition switch OFF.

24. Disconnect the jumper wire.

25. Remove the blower motor high relay, and test it

(see page 22-88).

Go to step 26.

Replace the blower motor high relay.

26. Connect the No. 4 terminal of the blower motor

high relay 5P connector to body ground with a
jumper wire.

27. Turn the ignition switch ON (II).

Go to step 28.

Repair open in the wire between the blower

motor high relay and the blower motor.

28. Turn the ignition switch OFF.

29. Disconnect the jumper wire.

30. Turn the ignition switch ON (II).

31. Measure the voltage between the No. 1 terminal of

the blower motor high relay 5P connector and body
ground.

Go to step 32.

Repair the open in the wire between the

blower motor high relay and the No. 3 fuse in the
driver’s under-dash fuse/relay box.

32. Turn the ignition switch OFF.

33. Check for continuity between the No. 5 terminal of

the blower motor high relay 5P connector and body
ground.

• Without Navigation System: Go to step 34.
• With Navigation System: Go to step 36.

Check for an open in the wire between the

blower motor high relay and body ground. If the
wire is OK, check for poor ground at G401.

(cont’d)

Wire side of female terminals

Is the r elay OK ?

Does the blower motor r un?

Is ther e battey voltage?

Is ther e continuity?

03/07/29 10:13:27 61S0X050_210_0104

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