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Home >> Saab >> 1984 >> 900 S, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Turbocharger >> Testing >> Pressure Transducer >> APC Only

APC Only

  1. Disconnect pressure transducer hose at inlet pipe. Connect pressure gauge to hose from pressure transducer. On 1983 and newer models remove rubber bellow between front and rear center console. Remove front center console. Remove padding. Disconnect pressure transducer hose at "Y" connection. Connect pressure gauge to hose from pressure transducer.
  2. Connect air pump via hose and connector to hose from pressure transducer. Disconnect electrical wires from pressure transducer. Connect an ohmmeter to electrical terminals of pressure switch. Measure resistance which should be 10 Ohms at atmospheric pressure.
  3. Using air pump, raise pressure to 1 bar approximately, then reduce it to .6 bar while tapping pressure transducer lightly with handle of a screwdriver. Measure resistance which should be 88 Ohms at .6 bar. If readings are not obtained, replace pressure transducer.
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