You have a shift interlock problem . What kind of vehicle ? a mercury what ?
Shift Interlock System
The shift interlock system prevents shifting from PARK unless the brake pedal is depressed. The 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.
Do the brake lights work ?
Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:
Visual Inspection Chart
Mechanical
Electrical
- Damaged shift lock actuator
- Damaged transmission control (TC) switch
- Damaged shift interlock switch
- Failed fuse(s):
- Damaged wiring harness
- Loose or corroded connections
- Damaged shift interlock switch
Symptom Chart
Condition
Possible Sources
Action
- Shift interlock system does not release/lock correctly
- Circuitry
- Fuse(s):
- Brake pedal position (BPP) switch
- Brake shift interlock actuator
- Brake shift interlock actuator module
PINPOINT TEST A: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY
Test Step
Result / Action to Take
A1 TEST THE BRAKE LIGHTS
- Apply brake pedal and view brake lights.
- Do brake lights illuminate?
Yes
GO to A7 .
No
GO to A2 .
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 .
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
Do
×