Shift Interlock System
The shift interlock system prevents the shifting from PARK unless the brake pedal is depressed. The shift interlock system consists of a shift lock actuator mounted at the base of the steering column or on the floor shifter mechanism. If the ignition switch is in the RUN position, the shift lock actuator is on unless the brake pedal is depressed.
Transmission Control Switch (TCS)
The transmission control switch (TCS) is a momentary contact switch that is located on the end of the column transmission control selector lever or on the floor shifter knob. Pushing the TCS will either disengage or engage the overdrive function of the automatic transmission. If the OVERDRIVE is disengaged, the word OFF will illuminate on the instrument panel.
External Controls - Column Shift
Refer to SYSTEM WIRING DIAGRAMS (Navigator) or SYSTEM WIRING DIAGRAMS (Expedition) for schematic and connector information.
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- Verify the customer concern by operating the transmission external control.
- Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart
- If the fault is not visually evident, determine the symptom. GO to «SYMPTOM CHART»(ref-209913-S26113254142005121200000) .
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External Controls - Floor Shift
Refer to SYSTEM WIRING DIAGRAMS (Navigator) or SYSTEM WIRING DIAGRAMS (Expedition) for schematic and connector information.
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- Verify the customer concern by operating the transmission external control.
- Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart
- If the fault is not visually evident, determine the symptom. GO to the «SYMPTOM CHART»(ref-209913-S05388094222005121200000) .
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- Place the gearshift lever in the (D) position. Place a three pound weight on the gearshift lever.
- With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-209881) .
- Disconnect the transmission shift cable from the manual control lever.
- Unlock the lock tab on the transmission shift cable.
- Place the manual control lever in the (D) position. Place the manual control lever in the first gear position. Move the manual control lever two detents to the (D) position.
- Connect the transmission shift cable to the manual control lever.
- Lock the transmission shift cable lock tab.
- Remove the three pound weight.
- Carefully move the manual control lever from detent to detent and compare with transmission settings. Verify that the vehicle will start in PARK or NEUTRAL and backup lamps illuminate in REVERSE. If not, Steps 1 -5 must be repeated. Carry out the digital transmission range (TR) sensor adjustment. For additional information, refer to «AUTOMATIC TRANSMISSION - 4R100»(ref-209910) . Readjust if necessary.
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- Place the gearshift lever in the (D) position.
- With the vehicle in NEUTRAL, position the vehicle on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-209881) .
- Disconnect the transmission shift cable from the manual control lever.
- Unlock the lock tab on the transmission shift cable.
- Place the manual control lever in the (D) position. Place the manual control lever in the first gear position. Move the manual control lever two detents to the (D) position.
- Connect the transmission shift cable to the manual control lever.
- Lock the transmission shift cable lock tab.
- Carefully move the manual control lever from detent to detent and compare with transmission settings. Verify that the vehicle will start in PARK or NEUTRAL and backup lamps illuminate in REVERSE. If not, Steps 1 -5 must be repeated. Carry out the digital transmission range (TR) sensor adjustment. For additional information, refer to «AUTOMATIC TRANSMISSION - 4R70W»(ref-209911) . Readjust if necessary.
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- Remove the upper instrument panel steering column cover. For additional information, refer to «INSTRUMENT PANEL AND CONSOLE»(ref-209958) .
- Place the transmission control selector lever in the (D) position. Rotate the transmission control selector lever clockwise until it bottoms out (first gear), then rotate two detents counterclockwise ((D) position).
- Hang a three pound weight on the transmission control selector lever.
- Center the pointer in the middle of the (D) position. Rotate the thumbwheel located on the bottom of the steering column to adjust the pointer.
- Remove the three pound weight.
- Carefully move the shift control selector lever from detent to detent and compare with transmission settings. Readjust if necessary.
- Install the upper instrument panel steering column cover. For additional information, refer to «INSTRUMENT PANEL AND CONSOLE»(ref-209958) .
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- Remove the steering column. For additional information, refer to «STEERING COLUMN»(ref-209896) .
- Remove the shift lever while in the DRIVE position.
- Remove the two insert plate screws. Remove the brake switch interlock actuator interrupt switch bracket. Position the PARK detection switch aside.
- Carefully remove the brake switch interlock interrupt switch from the steering column housing.
- Confirm the two retaining holes for the brake switch interlock interrupt switch are free of plastic material.
- Remove the wire harness from the retaining clips.
- Remove the two screws retaining the brake shift interlock actuator from the steering column housing.
- Rotate the brake shift interlock actuator rod to remove the blocker on the insert plate from the actuator.
- To install, reverse the removal procedure.
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- Lift the floor shift PRNDL bezel.
- Disconnect the PRNDL bezel wire harness connector.
- Remove the shift lever handle and cover. Slide the handle bezel down. Remove the screw. Disconnect the TCS wire harness. Lift assembly from the shifter lever.
- Position the window regulator control panel aside.
- Remove the screws and the console finish panel.
- Remove the left side console access panel.
- Disconnect the transmission shift cable from the transmission selector arm.
- Remove the transmission shift cable retaining clip from the floor shift mechanism through the console access.
- Remove the four bolts retaining the floor shift mechanism to the floor.
- Disconnect the floor shift mechanism wire harness connector.
- Remove the floor shift mechanism from the console.
- Remove the brake shift interlock actuator and harness. Remove the wire harness retainers. Remove the two screws retaining the brake shift interlock assembly.
- To install, reverse the removal procedure.
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- Remove the instrument panel lower finish panel. For additional information, refer to «INSTRUMENT PANEL AND CONSOLE»(ref-209958) .
- Disconnect the transmission shift cable from the steering column. Disconnect the transmission shift cable from the transmission selector lever arm and support. Carefully lift the two locking tabs and disconnect the transmission shift cable from the steering column bracket.
- Remove the cable retaining screw.
- Push the rubber grommet and transmission shift cable through the floor panel.
- With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-209881) .
- Remove the transmission shift cable from the automatic transmission. Disconnect the transmission shift cable from the manual control lever. Depress the lock tabs to release the transmission shift cable from the bracket.
- Remove the shift cable bracket from the transmission. Remove the bolts. Remove the bracket.
- Remove the cable from the cable route assist clip located at the transmission bell housing.
- To install, reverse the removal procedure. CAUTION: Make sure the cable is inserted into the cable route assist clip. Failure to do so can result in exhaust contact. Adjust the shift cable. For additional information, refer to «CABLE AND BRACKET ADJUSTMENT - COLUMN SHIFT»(ref-209913-S23736891632005121200000) .
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- Lift the floor shift PRNDL bezel.
- Disconnect the PRNDL bezel wire harness connector.
- Remove the handle and PRNDL bezel. Slide the handle bezel down. Remove the screw. Disconnect the TCS wire harness. Remove the handle and bezel.
- Remove the window regulator control panel.
- Remove the screws and the console finish panel.
- Remove the left side console access panel.
- Disconnect the transmission shift cable from the transmission selector lever arm.
- Remove the transmission shift cable retaining clip from the floor shift mechanism through the console access panel.
- Push the rubber grommet and transmission shift cable through the floor panel.
- With the vehicle in NEUTRAL position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-209881) .
- Remove the transmission shift cable from the automatic transmission. Disconnect the transmission shift cable from the manual control lever. Depress the lock tabs to release the transmission shift cable from the bracket.
- Remove the shift cable bracket from the transmission. Remove the bolts. Remove the shift cable bracket.
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- Follow the removal procedure in reverse order. Adjust the shift cable. For additional information, refer to «CABLE AND BRACKET ADJUSTMENT - FLOOR SHIFT»(ref-209913-S16594787882005121200000) .
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- Remove the steering wheel. For additional information, refer to «STEERING COLUMN»(ref-209896) .
- Remove the upper and lower steering column shroud.
- Remove the gearshift lever. Disconnect the electrical connector. Remove and discard the gearshift lever pin. Remove the gearshift lever.