Symptom Chart

WARNING: This page is about a different car, the 2015 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to: Diagnostic Methods .

In most circumstances, the PCM sets Diagnostic Trouble Codes (DTCs) to help guide with diagnostics. Refer to the DTC Chart before using the symptom chart. The Symptom column lists the vehicle condition. The Possible Sources column lists a detailed vehicle condition. The Action column lists the action to be performed to determine the cause of the condition. Each action lists the components that can cause the system and the individual components in that system. The components are listed in order of disassembly. Use the list of components and the required action to focus on disassembly inspections for the root cause of the concern.

Symptom	Possible Sources	Action
Unable to duplicate customer concern; no Diagnostic Trouble Codes (DTCs) present	The concern description is inaccurate	CARRY OUT the AWD System Functional Test. GO to Pinpoint Test A
Vehicle has no or inadequate torque at rear wheels	Fuse(s) Wiring, terminals or connectors Active torque coupling solenoid AWD relay module PCM Wheels/tires Power transfer unit mechanical failure Rear axle	GO to Pinpoint Test E REFER to: Wheels and Tires . REFER to: Power Transfer Unit . REFER to: Axle Assembly .
Vehicle binds in a turn or resists turning/pulsates or shudders in a straight line	Wheels/tires Power transfer unit mechanical failure Driveshaft Wiring, terminals or connectors Active torque coupling solenoid AWD relay module Brake system Wheel bearings Halfshafts ABS system	REFER to: Wheels and Tires . REFER to: Power Transfer Unit . REFER to: Driveshaft . GO to Pinpoint Test E REFER to: Brake System . REFER to: Suspension System . REFER to: Front Drive Halfshafts . REFER to: Anti-Lock Brake System (ABS) And Stability Control .
Tire/axle out of acceptable range	Wheels/tires ABS system	GO to Pinpoint Test B
Loss of AWD function or partial AWD function	Power transfer unit overheating	INSPECT the duct that cools the power transfer unit sump is free and clear of debris.