Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Symptom Chart- External Controls
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to: Diagnostic Methods for information about these practices.
In most circumstances, the PCM/ TCM and BCM sets DTC to help guide with diagnostics. Refer to the DTC Chart before using the symptom chart. The Condition 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.
| Symptom | Possible Sources | Action |
|---|---|---|
| Brake shift interlock system does not release/lock correctly | Body Control Module (BCM) fuse 18 (5A) Brake Shift Interlock Actuator (BSIA) Circuitry |
GO to Pinpoint Test A or GO to Pinpoint Test B |
| The PRNDL display does not correspond to the gear | Selector lever cable bracket IPC PRNDL display malfunction Selector lever cable loose from the transmission bracket Selector lever cable adjustment incorrect |
TIGHTEN bolts holding selector lever cable bracket. PRNDL display malfunction. Refer to: Instrumentation, Message Center and Warning Chimes . VERIFY the selector lever cable is seated in the selector lever cable bracket. VERIFY the selector lever cable adjustment. Refer to: Selector Lever Cable Adjustment - 6-Speed Automatic Transmission - 6R100 . ADJUST selector lever cable, if necessary. REFER to: Selector Lever Cable Adjustment - 6-Speed Automatic Transmission - 6R140 . |
| The PRNDL indicator is always/never on | IPC PRNDL display malfunction Circuitry |
PRNDL display malfunction. Refer to: Instrumentation, Message Center and Warning Chimes . |
| The tow/haul switch is not operating correctly | BCM fuse 19 (7.5A) Tow/haul switch Tow/haul switch not cycled during self-test PCM TCM Circuitry |
GO to Pinpoint Test C |
| The select shift switch is not operating correctly | Select shift switch PCM TCM Circuitry |
GO to Pinpoint Test D |
| Water enters inside the vehicle | Cable assembly grommet Torn selector lever cable assembly grommet |
SECURE the grommet to dash panel. INSTALL a new selector lever cable. Refer to: Selector Lever Cable - 6-Speed Automatic Transmission - 6R100 . Refer to: Selector Lever Cable - 6-Speed Automatic Transmission - 6R140 . |
| Excessive selector lever effort | Selector lever cable Selector lever cable bracket |
INSTALL a new selector lever cable. Refer to: Selector Lever Cable - 6-Speed Automatic Transmission - 6R100 . Refer to: Selector Lever Cable - 6-Speed Automatic Transmission - 6R140 . ADJUST the selector lever cable. TIGHTEN the selector lever cable bracket screws. |
| The selector lever will not shift from range | Selector lever cable disconnected Broken selector lever cable |
REINSTALL the selector lever cable. INSTALL a new selector lever cable. Refer to: Selector Lever Cable - 6-Speed Automatic Transmission - 6R100 . Refer to: Selector Lever Cable - 6-Speed Automatic Transmission - 6R140 . |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.