Symptom Chart

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.

In most circumstances, the PCM sets DTCs to help guide with diagnostics. Refer to the DTC CHART before using the symptom chart. The Condition column lists the vehicle condition. The Source 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 caused 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 CHART - EXTERNAL CONTROLS

Condition	Possible Sources	Action
Brake shift interlock system does not release/lock correctly	Fuse BSIA damaged BPP switch TR sensor Selector lever cable	INSTALL a new selector lever assembly. REFER to SELECTOR LEVER . DIAGNOSE and REPAIR all TR sensor DTCs. REFER to AUTOMATIC TRANSMISSION - 6F50/6F55 . VERIFY selector lever cable adjustment. REFER to SELECTOR LEVER CABLE ADJUSTMENT .
Selector lever linkage is out of correct gear relationship	Selector lever linkage out of adjustment	REFER to SELECTOR LEVER CABLE ADJUSTMENT .
	Manual control lever not aligned correctly on the TR sensor (flat surfaces do not line up)	REMOVE the manual control lever nut and CHECK the alignment of the manual control lever.
	Loose selector lever cable bracket	CHECK the selector lever cable bracket. TIGHTEN as necessary.
Vibration - a high frequency (20-80 Hz) that is felt through the seat or selector lever. Changes with engine speed	Selector lever cable incorrectly routed, grounded out or loose	REFER to SELECTOR LEVER CABLE .