Pinpoint Test A: The Brake Shift Interlock System Does Not Release/Lock Correctly

External Controls

Pinpoint Tests

PINPOINT TEST A: THE BRAKE SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY

-------------------------------------------------
A1 TEST THE BRAKE LIGHTS

- Apply the brake pedal and view the brake lights.
- Do the brake lights illuminate?

Yes
GO to A2.

No
REFER to Exterior Lighting Testing and Inspection.

-------------------------------------------------
A2 TEST SJB FUSE 5 (10A)

- Check fuse: Smart Junction Box (SJB) 5 (10A).
- Is the resistance less than 5 ohms?

Yes
GO to A3.

No
INSTALL a new fuse. GO to A3.

-------------------------------------------------
A3 TEST BSIA POWER CIRCUIT

- Disconnect: Selector Lever Electrical C3233.
- Ignition ON.
- Measure the voltage between selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and ground, while applying the brake pedal.




- Is the voltage greater than 10 volts?

Yes
GO to A6.

No
GO to A4.

-------------------------------------------------
A4 TEST THE BSIA POWER CIRCUIT FOR A SHORT TO GROUND

- Ignition OFF.
- Disconnect: SJB C2280C.
- Measure the resistance between selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to A5.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------
A5 TEST THE BSIA POWER CIRCUIT FOR AN OPEN

- Ignition OFF.
- Measure the resistance between the selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and SJB C2280C-23, circuit CET53 (BU/OG), vehicle harness side.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new SJB. TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------
A6 TEST THE BSIA GROUND CIRCUIT

- Ignition OFF.
- Measure the resistance between selector lever harness C3233-5, circuit GD116 (BK/VT), vehicle harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new selector lever. REFER to Selector Lever - Fusion/Milan Selector Lever or Selector Lever - MKZ Selector Lever.

No
REPAIR the circuit. TEST the system for normal operation.

-------------------------------------------------