2003 Honda Odyssey Repair Question
2003 Honda Odyssey A/C trouble shooting help needed
Is your vehicle equipped with navigation system?
Only high speed blower motor indicates a possible fault with the power resistor.
I would suggest starting with checking for trouble codes.
HOW TO RETRIEVE A DIAGNOSTIC TROUBLE CODES
The climate control unit has a self-diagnosis function. To run the self-diagnosis function, do the following:
1. Turn the Ignition switch ON (II).
2. Press the AUTO button and then press the OFF button. Continue to hold both buttons down for 1 minute. If there is any abnormality in the system the temperature Indicator will light up the segment (A through N) corresponding to the error. The temperature indicator
will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through N).
The system will only display the DTC when the AUTO and OFF buttons are pressed if you release the buttons the display will go blank. To return the display, simply press the AUTO then the OFF buttons again.
If there is no abnormality the segment will not light up.
Cancelling the Self-diagnosis Function
3. Turn the ignition switch OFF to cancel the self-diagnosis function. After completing repair work run the self-diagnosis function again to make sure that there are no other malfunctions.
My car does not have the Navigation System and I ran the DTC and only recieved the flashing "88" followed by "_". I tried it several times with the same response... "88", "_", "88", "_", etc... As far as normal trouble codes, I did have a P1456 code in the computer, but I think my wife forgot to turn the fuel cap till if clicked three times!
The diagram shows how the trouble codes are shown. If there is a dash lighted up at the bottom of the second 8, it could mean a blower motor circuit failure. Reconfirm this.
BINGO! that's it. N-problem in the blower motor circuit... I'll tear it open tonight or tomorrow and see if the blower is getting power or needs replacing. If the blower motor is not functioning, will it keep the AC from staying/coming on? Thanks and I'm gonna send some more $ your way for the help!
Pulled the blower motor which runs off direct conect with the battery. Not sure how to test the blower resistor... I'm getting 14.5V at the motor with the fan selected to high (Motor runs) and 12.3V with it selefted off... Ideas?
Got the resistor off and I have 10.3V going into it with the fan on high (running) and 0.48V with the fan on auto or any intermediate setting... Resistor visually appears normal with no visual defects. Ideas?
Testing the resistor requires some modifications and you have to pay attention to every details to get the correct results.
POWER TRANSISTOR TEST
1. Disconnect the 5P connector from the power transistor.
2. Measure the resistance between the No. 1 and. No. 4 terminals of the power transistor. It should be approximately 1.4 - 1.5 kohm.
a) If the resistance is within the specifications go to step 3.
b) If the resistance is not within the specifications replace the power transistor.
3. Carefully release the lock tab on the No. 3 terminal (ORN/BLK) A) in the 5P connector then remove the terminal and insulate it from body ground.
4. Connect a 1.2 - 3.4 W bulb (B) between the No. 3 and the No. 4 cavity on the 5P connector.
5. Reconnect the 5P connector to the power transistor.
6. Turn the ignition switch ON (II) and check that the blower motor runs.
a) If the blower motor does not run replace the power transistor.
b) If the blower motor runs replace the climate control unit.
Any idea where the Climate Control Unit is located? I've got a good test on the resistance between the No.1 and No.4 terminals... 1.5 kohm.
That is the control panel itself.
The one test is not good enough, because it can work the high speed fan. For other speed you need to perform the other tests.
This component is more likely to fail rather then the control unit.