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Pinpoint Test C : P188B: Notes

Diagnostic Overview 

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices. This pinpoint test is intended to diagnosis the wiring, terminals, connectors, AWD relay and PCM.

NOTE: Fuse 70 (15A) is HOT at all times and protects multiple components. Check related systems that may be inoperative.

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

Normal Operation and Fault Conditions 

The AWD system uses data from other systems as inputs to the PCM. The PCM uses the inputs to determine the appropriate time to send a signal and have the AWD relay energize the ATC solenoid.

DTC Fault Trigger Conditions 

DTC  Description  Fault Trigger Conditions 
P188B AWD Clutch Control Circuit When the PCM detects an open, a short to ground or voltage on the active torque control coupling solenoid voltage supply and or return circuit.
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