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Home >> Pontiac >> 2004 >> Aztek Base, AWD >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Drive Axle - Limited-Slip Differential >> Description and Operation >> Locking Differential Description and Operation >> Powertrain Control Module (PCM)

Powertrain Control Module (PCM)

The PCM monitors the data from the ABS controller and rear drive module (RDM) for proper operating conditions. If inappropriate conditions are present, the PCM commands the differential clutch pump actuator check valve closed, disabling the AWD system. The PCM also commands the AWD disable indicator on.

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