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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1810 (Transfer Case - Four Wheel Drive (4WD) Systems - F-150 & Mark LT) >> Diagnostic Tests >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Pinpoint Tests >> Pinpoint Test J: No Communication With the Four Wheel Drive (4WD) Control Module >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

In order for the four wheel drive (4WD) control module (PCM) to communicate with the scan tool, the operating voltage required to supply the 4WD control module (PCM) is in a range between 9 and 16 volts. Hot-at-all times voltage is supplied by circuit 1861 (RD) and circuit 1865 (WH/OG).

Possible Causes

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