Mariner 2WD V6-3.0L (2008)
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The smart junction box (SJB) is also known as the generic electronic module (GEM).
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Prior to the replacement of the module, it is necessary to upload the module configuration information to the appropriate scan tool. This
information must be downloaded into the new module after installation.
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The tire pressure monitoring system (TPMS) functionality is integral to the SJB/GEM.
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The steps included in the SJB/GEM removal and installation procedure are critical to restoring the vehicle security and tire pressure monitoring
systems to normal operation. A new SJB/GEM is delivered in a manufacturing mode with 7 pre-set DTCs related to the TPMS. To clear the DTCs,
successful configuration of the SJB/GEM must occur, followed by successful TPMS sensor training, and a successful self-test, including clearing
of the DTCs. The DTCs are as follows:
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B106D (Tire Pressure Monitor System [TPMS] Initiators Not Configured)
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B2477 (Module Configuration Failure)
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B2868 (Left Front Tire Pressure Sensor Fault)
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B2869 (Right Front Tire Pressure Sensor Fault)
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B2870 (Right Rear Tire Pressure Sensor Fault)
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B2871 (Left Rear Tire Pressure Sensor Fault)
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C2780 (ECU in Manufacturer Sub-State)
1. NOTE: This step is necessary only if the SJB/GEM is being replaced.
Upload the module configuration information from the SJB/GEM.
2. Remove the floor console SJB/GEM cover.
3. Remove the transmission selector lever bezel from the floor console finish panel.
4. Apply the parking brake.
5. Remove the parking brake lever boot from the floor console finish panel.
6. Remove the floor console finish panel.
7. Disconnect the 7 electrical connectors.
8. Remove the 2 bolts and the SJB/GEM.
Installation
1. Install the SJB/GEM.
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Install the 2 bolts.
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Connect the 7 electrical connectors.
2. Install the floor console finish panel.
3. Install the parking brake lever boot into the floor console finish panel.
4. Release the parking brake.
5. Install the transmission selector lever bezel into the floor console finish panel.
6. NOTE: If the SJB/GEM was not replaced, this is the last step that is necessary.
Install the floor console SJB/GEM cover.
7. NOTE:
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When successful, this step provides the calibration necessary for the SJB/GEM operation and clears DTCs B2477 and B106D. The clearing of
these DTCs indicates the calibration data has been successfully downloaded to the new SJB/GEM.
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When successful, this step also programs the remote transmitter portion of the integrated keyhead transmitter (IKT) keys into the new SJB. In
the event the IKTs (remote transmitter portion only) do not program to the new SJB, cycle each IKT key to the ON position for a minimum of
6 seconds. This action will program the remote transmitter portion of the IKT key into the new SJB.
Download the SJB/GEM configuration information from the scan tool.
8. NOTE: When successful, this step clears DTCs B2868, B2869, B2870 and B2871. The clearing of these DTCs indicates the SJB/GEM has
recognized the tire pressure sensors during the training procedure.
Train the tire pressure sensors.
9. NOTE: DTC C2780 will not clear if any other DTCs are present in the SJB/GEM. When successful, this step will clear the DTC C2780.
Carry out the SJB/GEM on-demand self-test by clearing DTCs, and then retrieving DTCs to confirm all DTCs have been cleared.
