V8 Quattro V8-3562cc 3.6L DOHC (PT) (1990)
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turn phone OFF
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substitute vehicle's antenna with magnetic mount test antenna US 30845
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turn phone ON
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observe flashing display on handset
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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