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Home >> Mercury >> 2009 >> Sable Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1188 (MULTIFUNCTION Electronic Modules System) >> Removal And Installation >> Smart Junction Box (SJB) >> Removal

Smart Junction Box (SJB): Removal

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: If the smart junction box (SJB) is dropped, damage to the internal components may occur. A new SJB must be installed.
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 to the scan tool. This information must be downloaded into the new module after installation. For additional information, refer to MODULE CONFIGURATION article. In the event that As-Built data is required (SJB will not communicate), all remote keyless entry (RKE) devices must be programmed to the new SJB. A minimum of 2 devices are necessary to complete the configuration and turn off the flashing interior lights.
NOTE: The tire pressure monitoring system (TPMS) functionality is integral to the SJB.
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 a manufacturing mode with 7 pre-set DTCs related to the TPMS. To clear the DTCs, successful configuration of the SJB must occur, followed by successful TPMS sensor training, and a successful self-test, including clearing of the DTCs. The 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 Manufacturer 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, refer to MODULE CONFIGURATION article.
  2. Remove the steering column cover. For additional information, refer to INSTRUMENT PANEL AND CONSOLE article.
  3. Disconnect the 6 SJB electrical connectors.
  4. Remove the 2 harness pushpins from the SJB.
  5. Using a suitable tool, lift the SJB release tab (away from the SJB bracket), slide the SJB (wiggling it to the left) and remove.
  6. Disconnect the SJB B+ connector.
  7. If necessary, remove the 3 nuts and the SJB bracket.
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