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Pinpoint Test B : P187B: Notes

Refer to All Wheel Drive (AWD) for schematic and connector information.

Normal Operation and Fault Conditions 

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 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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