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Home >> Ford >> 2013 >> Edge SEL, 2.0L Eng VIN 9 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Four Wheel Drive (4WD) Systems) >> Diagnosis And Testing >> All Wheel Drive (AWD) Systems >> Pinpoint Tests >> Pinpoint Test B: DTC P187B >> Normal Operation and Fault Conditions

Normal Operation and Fault Conditions

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The AWD system uses input data from the ABS module wheel speed sensor inputs to the PCM. A dissimilar spare tire size (other than the spare tire provided) or major dissimilar tire sizes or improperly inflated tires between the front and rear axles could cause the AWD system to stop functioning correctly.

DTC FAULT TRIGGER CONDITIONS

DTC Description Fault Trigger Conditions
P187B Tire Size Out of Acceptable Range - AWD Disabled/Limited Function When the PCM detects an inappropriate size wheels/tires (greater than 7% difference in size across the front and rear axle or greater than 14% difference in size at one wheel on either the front or rear axle) installed.
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