Symptom Chart: Vehicle Dynamic Systems

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to Service Information for information about these practices.

Condition	Possible Sources	Actions
A module does not respond to the diagnostic scan tool	Fuse Wiring, terminals or connectors ABS module concern	Refer to article 'Module Communications Network', Go to Pinpoint Test B .
The red brake warning indicator is always or never on	Low brake fluid level Brake fluid level sensor Parking brake applied Parking brake switch Brake booster vacuum sensor IPC concern ABS concern	RETRIEVE all ABS DTCs and REFER to Anti-Lock Brake System (ABS) and Stability Control . If no DTCs are present and the indicator is never on, Refer to article 'Instrumentation, Message Center, and Warning Chimes', Go to Pinpoint Test K . If no DTCs are present and the indicator is always on, Refer to article 'Instrumentation, Message Center, and Warning Chimes', Go to Pinpoint Test L .
The yellow ABS warning indicator is always or never on	IPC concern ABS concern	RETRIEVE all ABS DTCs and REFER to Anti-Lock Brake System (ABS) and Stability Control . If no DTCs are present, Refer to article 'Instrumentation, Message Center, and Warning Chimes', Go to Pinpoint Test M .
The stability-traction control indicator (sliding-car icon) is always or never on	IPC concern ABS concern	RETRIEVE all ABS module DTCs and REFER to Anti-Lock Brake System (ABS) and Stability Control . If no DTCs are present, Refer to article 'Instrumentation, Message Center, and Warning Chimes', Go to Pinpoint Test N .
ABS false activation, ABS too sensitive, ABS activates on normal stop	Front or rear suspension concern	ELIMINATE the front/rear suspension as the cause of the problem. REFER to Suspension System General Information , Symptom Chart: Suspension System.
	Steering wheel angle sensor (vehicles with active park assist) SCCM (vehicles with active park assist) PSCM (vehicles with and without active park assist)	For vehicles equipped with active park assist, RETRIEVE and DIAGNOSE all SCCM and PSCM DTCs. For SCCM DTCs, REFER to the DTC chart in Steering Column Switches . For PSCM DTCs, REFER to the Interactive Diagnostics in Electronic Power Assist Steering (EPAS) System . For vehicles not equipped with active park assist, RETRIEVE and DIAGNOSE all PSCM DTCs. REFER to the Interactive Diagnostics in Electronic Power Assist Steering (EPAS) System .
	RCM mounting	CONFIRM the RCM is mounted correctly. REFER to Supplemental Restraint System .
	Loose wheel speed sensor or excessive air gap	INSPECT wheel speed sensor for looseness or excessive air gap. TIGHTEN or INSTALL new as necessary. REFER to Wheel Speed Sensor - Front and Wheel Speed Sensor - Rear .
	Parking brake shoes out of adjustment (dragging)	CHECK and if necessary, ADJUST the parking brake shoes.
The traction control system cannot be disabled	IPC message center A MyKey ® restricted key is in use with the AdvanceTrac ® always-on feature configured to ON	GO to Pinpoint Test M .