Home >> Ford >> 2006 >> Escape Base, 2.3 Z, 4WD, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> Transfer Case - Four-Wheel Drive Systems >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems >> Pinpoint Tests >> Pinpoint Test B: No Communication With The 4-Wheel Drive (4WD) Control Module >> Possible Causes