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Home >> Ford Truck >> 2007 >> Explorer 4WD V6-4.0L VIN K >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Body Control Module >> Service and Repair >> Smart Junction Box (SJB)

Smart Junction Box (SJB)

SMART JUNCTION BOX (SJB)


Special Tool(s):






Special Tool(s)


Part 1:






Part 2:






Removal

NOTE:
- The steps included in the SJB removal and installation procedure are critical to restoring the vehicle security and tire pressure monitoring systems to normal operation. A new SJB is delivered in manufacturing mode with 6 pre-set diagnostic trouble codes (DTCs) related to the tire pressure monitoring system. The presence of these DTCs requires the installation procedures be followed in order to clear the DTCs and enable normal SJB operations.
- Prior to the removal of the SJB, it is necessary to upload the module configuration information to the diagnostic tool. This information must be downloaded to the new SJB after installation.

1. Remove the driver door scuff plate.
2. Position the LH door opening weather seal aside.

3. NOTE: While pulling the trim panel rearward, pull the hood release lever rearward in order for the release lever to slide through the trim panel.

Remove the pushpin and the cowl side trim panel.

4. Remove the 2 bolts and the parking brake release handle.
5. Disconnect the parking brake switch electrical connector.
6. Release the hood release cable pushpin from the parking brake control bracket.
7. Release the harness clip from the parking brake cable housing.

8. NOTE: Rotating the parking brake control counterclockwise allows enough access to clear the instrument panel reinforcement.

Remove the 3 bolts and position the parking brake control assembly under the brake pedal.

9. CAUTION: The lower side of the headlight switch bezel includes 2 tabs that slide down onto the instrument panel and may be broken if any prying force is exerted in the lower area of the bezel.

Using a suitable tool, pry the mid-to-upper side of the headlight switch bezel away from the instrument panel, disconnect the 2 electrical connectors and position the bezel assembly aside.

10. If necessary, push the LH instrument panel side finish panel out and position it aside.
11. Through the headlight switch bezel opening, remove the 2 SJB bolts.
12. From under the instrument panel, remove the third SJB bolt.

13. NOTE: The SJB electrical connector levers must click into a fully released position before they can be removed and must click into a fully closed (connected) position when installing.

Pull the SJB down out of the 2 locating pins, disconnect the 5 electrical connectors and remove the SJB.

Installation

NOTE: When a new SJB is installed, all customer RKE transmitters may be required to program the RKE transmitters to the new SJB.

1. NOTE: The SJB electrical connector levers must click into a fully released position before they can be removed and must click into a fully closed (connected) position when installing.

Position the SJB into the 2 locating pins and connect the 5 electrical connectors.

2. From under the instrument panel, install the SJB bolt.
3. Through the headlight switch bezel opening, install the 2 SJB bolts.
4. If necessary, install the LH instrument panel side finish panel.
5. Connect the 2 electrical connectors and install the headlight switch bezel assembly into the instrument panel.
6. Position the parking brake control assembly and install the 3 bolts.
- Tighten to 20 Nm (15 lb-ft).

7. Install the harness clip on the parking brake cable housing.
8. Install the hood release cable pushpin into the parking brake control bracket.
9. Connect the parking brake switch electrical connector.
10. Position the parking brake release handle and install the 2 bolts.
11. Position the hood release lever assembly and install the bolt.

12. NOTE: While installing the trim panel, pull the hood release lever rearward in order for the release lever to slide through the trim panel.

Position the cowl side trim panel and install the pushpin.

13. Position the LH door opening weather seal.
14. Install the driver door scuff plate.

15. NOTE: When successful, this step provides the calibration necessary for SJB operation and clears DTC B2477. The clearing of the DTC indicates the calibration data has been successfully downloaded to the SJB.

Download the SJB configuration information from the diagnostic tool to the SJB.

16. NOTE: When successful, this step clears DTCs B2868, B2869, B2870 and B2871. The clearing of these DTCs indicates the SJB has recognized the tire pressure sensors during the training procedure.

Train the tire pressure sensors.

17. Clear the DTCs.

18. NOTE: This step is required to clear DTC C2780, cause the SJB to exit the manufacturing mode, and to be sure there are no other concerns with the newly programmed SJB.

Carry out the SJB on-demand self-test.

19. NOTE: If the module configuration upload/download is successful, then the RKE transmitters do not need to be reprogrammed to the vehicle. However, if the module configuration upload/download is unsuccessful and as-built data must be used to configure the module, then ALL of the customer's RKE transmitters must be reprogrammed to the vehicle.

Program the RKE transmitters to the new SJB (if necessary).
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