Symptom Chart: External Controls

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices.

In most circumstances the PCM sets a DTC to help guide with the 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
Brake shift interlock system does not release/lock correctly	Circuitry shorted to ground BCM	GO to Pinpoint Test A or GO to Pinpoint Test B
Brake Shift Interlock Actuator (BSIA) solenoid		INSTALL a new selector lever assembly. REFER to: Selector Lever Assembly .
Selector lever will not shift from PARK	Selector lever cable	VERIFY selector lever cable adjustment. REFER to: Selector Lever Cable Adjustment .
Selector lever cable retaining clip or bracket		INSTALL a new selector lever cable retaining clip or bracket. REFER to: Selector Lever Cable .
Broken selector lever cable		INSTALL a new selector lever cable. REFER to: Selector Lever Cable .
TCS (Grade Assist) does not operate correctly	Circuitry open or shorted to ground TCS (Grade Assist) switch PCM	CLEAR the DTC and PERFORM the KOER self-test. If the DTC returns, GO to Pinpoint Test C
IPC		REFER to: Instrumentation, Message Center and Warning Chimes .
Selector lever linkage is out of correct gear relationship	Selector lever linkage out of adjustment Manual control lever not aligned correctly on the sensor (flat surfaces do not line up) Loose selector lever cable bracket	REFER to: Selector Lever Cable Adjustment .
Vibration - a high frequency (20-80 Hz) that is felt through the seat or selector lever. Changes with engine speed	Selector lever cable grounded out or loose	REFER to: Selector Lever Cable .