Automatic Transmission External Controls: Other Ford Explorer IV

Brake Shift Interlock System

The brake shift interlock system prevents shifting from PARK unless the brake pedal is depressed. The brake shift interlock system consists of a brake shift lock actuator mounted on the selector lever. If the ignition switch is in the RUN position, the brake shift lock actuator is disabled when the brake pedal is depressed.

If the selector lever will not move out of PARK with the key in the ON position and the brake pedal depressed, it will need to be unlocked manually.

Transmission Control (TC) Switch

The transmission control (TC) switch is a momentary contact switch located on the selector lever knob. Pushing the TC switch will either disengage or engage the overdrive function of the transmission. If OVERDRIVE is disengaged, the message O/D OFF will illuminate on the instrument panel.

Special Tools Illustration Tool Name Tool Number 73 III Automotive Meter 105-R0057 or equivalent

Shift Interlock System

The brake/shift interlock system prevents shifting from PARK unless the brake pedal is depressed. The brake/shift interlock system consists of a shift lock actuator mounted on the selector lever. If the ignition switch is in the RUN position, the shift lock actuator is disabled when the brake pedal is depressed. If the selector lever will not move out of PARK with the key in the ON position and the brake pedal depressed, it will need to be unlocked manually.

The transmission control (TC) switch is a momentary contact switch located on the selector lever knob. Pushing the TC switch will either disengage or engage the overdrive function of the transmission. If OVERDRIVE is disengaged, the message O/D OFF will illuminate on the instrument panel.

Pinpoint Tests

Refer to SYSTEM WIRING DIAGRAMS , Transmission Controls - 5R55S for schematic and connector information.

Refer to SYSTEM WIRING DIAGRAMS , Transmission Controls - 6R60 for schematic and connector information.

Refer to SYSTEM WIRING DIAGRAMS , Shift Interlock for schematic and connector information.

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Scheme 55

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Scheme 62

1. A1 TEST THE BRAKE LIGHTS Apply brake pedal and view brake lights. Do brake lights illuminate? YES : Go to A7 . NO : Go to A2 .
2. A2 TEST FUSE F22 (15A) Key in OFF position. Check fuse: Smart Junction Box (SJB) Fuse F22 (15A) Is the resistance less than 5 ohms? YES : Go to A4 . NO : Go to A3 .
3. A3 TEST THE CIRCUIT FOR A SHORT TO GROUND Key in OFF position. Disconnect: Brake Pedal Position (BPP) Switch Measure the resistance between pin 1 and ground. Is the resistance greater than 10,000 ohms? YES : Go to A4 . NO : REPAIR circuit for short to ground. TEST the system for normal operation.
4. A4 TEST THE CIRCUIT FOR AN OPEN Disconnect: SJB C2280E Measure the resistance between SJB C2280E-28 and BPP switch connector pin 1. Is the resistance less than 5 ohms? YES : Go to A5 . NO : REPAIR circuit for open. TEST the system for normal operation.
5. A5 TEST THE BPP SWITCH Measure the resistance of BPP switch while open (OFF) and closed (ON). Is the resistance of switch greater than 10,000 ohms while OFF and less than 5 ohms while ON? YES : Go to A6 . NO : INSTALL a new BPP switch. TEST the system for normal operation.
6. A6 TEST THE CIRCUIT FOR A SHORT TO GROUND Disconnect: Selector Lever C2008 Measure the resistance between selector lever C2008-8, harness side and ground. Is the resistance greater than 10,000 ohms? YES : Go to A7 . NO : REPAIR circuit for short to ground. TEST the system for normal operation.
7. A7 TEST THE CIRCUIT FOR AN OPEN Measure the resistance between selector lever C2008-8, harness side and BPP switch connector pin 2. Is the resistance less than 5 ohms? YES : Go to A8 . NO : REPAIR circuit for open. TEST the system for normal operation.
8. A8 TEST FOR B+ Key in ON position. Measure the voltage between selector lever C2008-1, harness side and ground. Is the voltage greater than 10 volts? YES : Go to A12 . NO : Go to A9 .
9. A9 TEST FUSE F20 (10A) Key in OFF position. Check fuse: Fuse F20 (10A) Is the resistance less than 5 ohms? YES : Go to A11 . NO : Go to A10 .
10. A10 TEST THE CIRCUIT FOR A SHORT TO GROUND Measure the resistance between selector lever C2008-1, harness side and ground. Is the resistance greater than 10,000 ohms? YES : Go to A11 . NO : REPAIR circuit for short to ground. TEST the system for normal operation.
11. A11 TEST THE CIRCUIT FOR AN OPEN Disconnect: SJB C2280C Measure the resistance between SJB C2280C-12 and selector lever C2008-1, harness side. Is the resistance less than 5 ohms? YES : Go to A12 . NO : REPAIR circuit for open. TEST the system for normal operation.
12. A12 CHECK THE CIRCUIT FOR AN OPEN Measure the resistance between selector lever C2008-6, harness side and ground. Is the resistance less than 5 ohms? YES : Go to A13 . NO : REPAIR circuit for open. TEST the system for normal operation.
13. A13 CHECK THE CIRCUITS FOR AN OPEN Disconnect: Brake Shift Interlock Actuator Module Connector Measure the resistance between selector lever C2008-1, 2, 6, 8, component side and the brake shift interlock actuator module connector pins 6, 7, 2, 5. Are all the measurements less than 5 ohms? YES : Go to A14 . NO : REPAIR circuit for open. TEST the system for normal operation.
14. A14 CHECK THE BRAKE SHIFT INTERLOCK ACTUATOR Disconnect: Brake Shift Interlock Actuator Measure the resistance between pin 1 and pin 3 of the brake shift interlock actuator. Is the resistance between 20 and 30 ohms? YES : INSTALL a new brake shift interlock actuator module. TEST the system for normal operation. NO : INSTALL a new brake shift interlock actuator. TEST the system for normal operation.