Symptom Chart: Vehicle Dynamic Systems

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to DIAGNOSTIC METHODS 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 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 GO TO PINPOINT TEST K . If no DTCs are present and the indicator is always on, REFER to 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 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 GO TO PINPOINT TEST N .
ABS false activation, ABS too sensitive, ABS activates on normal stop	Front/rear suspension concern	ELIMINATE the front/rear suspension as the cause of the problem. REFER to SUSPENSION SYSTEM , 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 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 SYSTEM .
	RCM mounting	CONFIRM the RCM is mounted correctly. REFER to RESTRAINTS CONTROL MODULE (RCM) .
	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 .