The AC expansion valve on a 1991 Toyota Celica with a 2.2-liter engine is typically located near the evaporator core, which is situated inside the vehicle's dashboard. To access the expansion valve, you often need to remove the dashboard or the instrument panel, as it is connected to the AC lines leading to the evaporator. It's advisable to consult the vehicle’s service manual for detailed instructions and diagrams specific to your model.
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