Fuse Block: Service and Repair

SMART JUNCTION BOX (SJB)

Smart Junction Box (SJB):

Removal

Caution: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.

NOTE:
- Prior to the replacement of the module, it is necessary to upload the module configuration information into the appropriate scan tool. This information must be downloaded into the new module after installation.
- The tire pressure monitoring system (TPMS) functionality is integral to the SJB.
- 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 module is delivered in manufacturing mode with pre-set DTCs. These DTCs require that the TPMS sensor training procedure be carried out in order for the DTCs to be cleared. The pre-set DTCs are as follows:
- B106D - Tire Pressure Monitor System (TPMS) Initiators Not Configured
- B2477 - Module Configuration Failure
- B2868 - Left Front Tire Pressure Sensor Fault
- B2869 - Right Front Tire Pressure Sensor Fault
- B2870 - Right Rear Tire Pressure Sensor Fault
- B2871 - Left Rear Tire Pressure Sensor Fault
- C2780 - ECU in Manufacturing Sub-State

NOTE: This step is necessary only if the SJB is being replaced.

1. Upload the module configuration information from the SJB. For additional information, see PROGRAMMABLE MODULE INSTALLATION. Programmable Module Installation
2. Remove the RH lower cowl trim panel.
3. Disconnect the electrical connectors.
4. Remove the 3 screws and the SJB.

Installation

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

1. Install the SJB.
- Install the 3 screws.
- Connect the electrical connectors.

NOTE: If the SJB was not replaced, this is the last step that is necessary.

2. Install the RH lower cowl trim panel.

NOTE:
- When successful, this step provides the calibration necessary for the SJB operation and clears DTCs B106D and B2477. The clearing of these DTCs indicates the calibration data has been successfully downloaded to the new SJB.
- When successful, this step also programs the remote transmitters into the new SJB. In the event the remote transmitters do not program to the new SJB, all of the remote transmitters will need to be present.

3. Download the SJB configuration information from the IDS or equivalent tester. For additional information, see PROGRAMMABLE MODULE INSTALLATION. Programmable Module Installation

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.

4. Carry out TPMS sensor training. For additional information, see TIRE PRESSURE MONITORING SYSTEM (TPMS) SENSOR TRAINING.

NOTE: DTC C2780 will not clear if any other DTCs are present in the SJB. When successful, this step will clear the DTC C2780.

5. Carry out the SJB on-demand self-test by clearing DTCs, and then retrieving DTCs to confirm all DTCs have been cleared.