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acura mstr
acura mstr, Honda Master Tech
Category: Honda
Satisfied Customers: 5262
Experience:  ASE Master tech, , CA smog. ASE L1
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Rear climate control, heat and AC, in 2005 Honda Odyssey

Customer Question

Rear climate control, heat and AC, in 2005 Honda Odyssey Touring not working--no air comes from rear vents. Front AC and heat works fine. Rear lock button lights up on front climate controls, but the rear control light does not. Climate controls in second row do not work (no lights or response). I have replaced the rear relay box (rear passenger side, P/N: #38220-SHJ-A02), which fixed issues with sliding doors and rear wiper working intermittently. I have inspected the #1 30 amp fuse in the fuse box on the passenger side and it is serviceable.
Submitted: 3 months ago.
Category: Honda
Expert:  acura mstr replied 3 months ago.

Welcome to Just Answer My name is***** here to help you with your problem. Usually this is the rear blower transistor lets start by testing it first. Here is the test.

https://dl.dropboxusercontent.com/u/89860259/rear%20blower.pdf

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Customer: replied 3 months ago.
I replaced the rear blower transistor, but the problem remains unchanged.
Expert:  acura mstr replied 3 months ago.

When you performed the test did the blower motor run?

Customer: replied 3 months ago.
the blower motor runs when I use the jumper.
Expert:  acura mstr replied 3 months ago.

Ok,Here are the self tests for the system lets see if we can get some info to start testing the inputs.

https://www.dropbox.com/sh/6eq7rryo68gplgf/AAAqc6lnns7Q65qL5Ddtj2vOa?dl=0

Customer: replied 3 months ago.
Thanks! I just did the Communication Circuit self diagnostic Function Test(with rear climate control) on steps 6 and 8:"At the climate control panel, press and hold the fan ▲ button and then the OFF button. While holding both buttons, the fan indicator will light the segment A.If there is any problem in the system, the fan indicator will light corresponding segment (B through E)." and
""At the rear climate control panel, press and hold the fan ▲ button and then the OFF button. While holding both buttons, the fan indicator will light the segment A.If there is any problem in the system, the fan indicator will light corresponding segment (B through E)."In both tests Segment A and C are both lit up. According to the table the next step is: "Open in communication circuit to rear climate control unit and climate control unit." and/or "Faulty rear climate control unit."What would you recommend next?
Expert:  acura mstr replied 3 months ago.

Check power and ground to the rear climate unit and this connector ,if they are good and no wiring has been added before the problem started then looks like the rear unit is bad.

https://dl.dropboxusercontent.com/u/89860259/connector.pdf

https://dl.dropboxusercontent.com/u/89860259/Climate%20Control%20Rear%20Control%20Panel%20Power%20and%20Ground%20Circuit%20Troubleshooting.pdf

Customer: replied 3 months ago.
Replaced rear climate control unit -- problem still exists. Unable to view the attachment for wiring instructions. Could you please send again?
Expert:  acura mstr replied 3 months ago.

here it is again

https://www.dropbox.com/sh/6eq7rryo68gplgf/AAAqc6lnns7Q65qL5Ddtj2vOa?dl=0

Customer: replied 3 months ago.
Thanks! Where is the 22 pin connector located?
Expert:  acura mstr replied 3 months ago.

in the back of the control unit