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I have a 2008 Scion. I changed the water pump and alternator. After I put it back together I have no power steering, power door locks or windows, Tail or brake lights. Half the warning lights on the instrument panel are lit. I checked all the fuses I know about.

Because Toyota service departments are closed on weekends I took it to O'Reilly auto parts where I tried to have them use a diagnostic tool on it. The guy looked at me baffled and said it did not recognize that it was reading a car and told me he cannot help.

Any ideas?

Flyk
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Michael Dove
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1 Answers1

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The more I think about this, the more I am thinking that it is the Body Control Module (BCM) ECU that has failed. I believe all of those functions will be controlled by the BCM. It is also probably pulling down the CAN Bus which is causing the diagnostics tool to not connect. It may have failed when reconnecting the battery, or possibly the alternator is producing too high a voltage which has damaged it.

I have been trying to find out if the car has a separate ECU for the power steering, but haven't worked it out yet. According to this website it has electric power steering, so that would fit with it being an ECU problem - http://www.edmunds.com/scion/xd/2008/features-specs/

HandyHowie
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