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Old 12-29-2019, 04:22 PM
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TheDurk TheDurk is offline
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TheDurk TheDurk is offline
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Well, assuming your reporting is accurate, the only explanation is two separate fails. Firt one I would tackle is why ADD won't engage with vacuum on either side.

When in doubt, RTFM:

First, make sure your vac lines are both intact all the way from the VSVs to the actuator on the front diff. If they are, you are going to have to get back under there and pull the actuator. This section shows how to test it. See item 3.
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File Type: pdf SA-49 Inspection (2000 4Runner) A.D.D. Control System.pdf (81.2 KB, 100 views)
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