S4 Sedan L5-2226cc 2.22L DOHC Turbo (AAN) (1992)
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read strength of RSSI readings and compare to average readings received from vehicle's antenna
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RSSI reading of vehicle's antenna must not vary by more than -10 units
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replace vehicle antenna if its RSSI readings are more than 10 units below that of magnetic mount test antenna US 30845