Smart Junction Box (SJB)
The Smart Junction Box (SJB) (located under the passenger side of the floor console) has control of the following systems
- Interior lighting
- Exterior lighting
- Dimmable backlighting
- Battery saver function
- Delayed accessory relay function
- Horn
- Heated rear window
- Brake shift interlock
- Power door locks
- Remote Keyless Entry (RKE) system
- Passive Anti-Theft System (PATS)
- Tire Pressure Monitoring System (TPMS)
Refer to the appropriate article in this service information for system specific information and diagnostics.
Battery Saver
Note. Time-out is 1 minute if the vehicle has less than 80 km (50 miles).
The SJB provides automatic shut-off of some system controlled components after a time-out period in order to save battery voltage. A timer in the SJB is started when the ignition is turned OFF and all the doors are closed. When 10 minutes have elapsed, the voltage is automatically shut off by the SJB. While the SJB has voltage disabled, if the ignition changed out of OFF, any door becomes ajar, the UNLOCK button of the RKE transmitter is pressed, a valid keypad code is entered, or the instrument panel dimmer switch is pressed, the SJB restores voltage and starts the timer again.
Post Crash Alert Feature
The post crash alert is a function controlled by the SJB. If the Restraints Control Module (RCM) determines an impact of enough severity (the air bags may or may not be deployed), the post crash alert function is activated. The post-crash alert function activates the hazard lamp function and cycles the horn on 3 times, then off for 4 seconds, and repeats this cycle until the battery is discharged or the function is turned off. The post crash alert function can be turned off by
- pressing the hazard flasher lamp switch (which may need to be pressed twice).
- pressing the RKE transmitter UNLOCK button.
- pressing the RKE transmitter PANIC button.
Diagnostic Trouble Code (DTC) Chart
Each module has a comprehensive DTC chart listed in an appropriate section. Refer to the table below for the appropriate section.
Master DTC Index
| Module | Reference |
|---|---|
| ABS Module | REFER to ANTI-LOCK BRAKE SYSTEM - VEHICLE DYNAMIC SYSTEM article. |
| Accessory Protocol Interface Module (APIM) | REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article. |
| Audio Control Module (ACM) | REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article. |
| Battery Control Module (BCM) Module | REFER to HIGH VOLTAGE TRACTION BATTERY article. |
| Front Controls Interface Module (FCIM) | REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article. |
| Front Display Interface Module (FDIM) | REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article. |
| Global Positioning System Module (GPSM) | REFER to DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM article. |
| Transmission Control Module (TCM) | REFER to the INTRODUCTION article. |
| HVAC Module | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article. |
| Instrument Cluster (IC) | REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article. |
| Air Conditioning Compressor Module (ACCM) | REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - HYBRID article. |
| Occupant Classification System Module (OCSM) | REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. |
| Parking Aid Module (PAM) | REFER to PARKING AID article. |
| PCM | REFER to ELECTRONIC ENGINE CONTROLS - 2.5L article, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) article or ELECTRONIC ENGINE CONTROLS - HYBRID article. |
| Power Steering Control Module (PSCM) | REFER to STEERING SYSTEM article. |
| Restraints Control Module (RCM) | REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. |
| Smart Junction Box (SJB) | REFER to the SMART JUNCTION BOX (SJB) DTC CHART in this section. |
| 4X4 control module | REFER to FOUR WHEEL DRIVE (4WD) SYSTEMS article. |
MASTER DTC INDEX
Special Tool(s)
SPECIAL TOOLS Fluke 77-IV Digital Multimeter FLU77-4 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool Flex Probe Kit NUD105-R025D or equivalent
Scheme 167
Scheme 168
Scheme 169
Principles of Operation
Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).
The SJB controls various systems (such as exterior lighting, interior lighting, power door locks, anti-theft system, dimmable backlighting and the battery saver feature) by monitoring inputs from switches, sensors and messages sent from other modules on the Medium Speed Controller Area Network (MS-CAN). Based on the inputs received, the SJB activates outputs. For example, the SJB monitors the headlamp switch position. Based on this input, the SJB may provide voltage to the exterior lamps.
Field-Effect Transistor (FET) Protection
A Field-Effect Transistor (FET) is a type of transistor that when used with module software can be used to monitor and control current flow on module outputs. The FET protection strategy is used to prevent module damage in the event of excessive current flow.
The SJB utilizes an FET protective circuit strategy for many of its outputs (for example, a headlamp output circuit). Output loads (current level) are monitored for excessive current (typically short circuits) and are shut down (turns off the voltage or ground provided by the module) when a fault event is detected. A short circuit DTC is stored at the fault event and a cumulative counter is started.
When the demand for the output is no longer present, the module resets the FET circuit protection to allow the circuit to function. The next time the driver requests a circuit to activate that has been shut down by a previous short ( FET protection) and the circuit is still shorted, the FET protection shuts off the circuit again and the cumulative counter advances.
When the excessive circuit load occurs often enough, the module shuts down the output until a repair procedure is carried out. Each FET protected circuit has 3 predefined levels of short circuit tolerance based on the harmful effect of each circuit fault on the FET and the ability of the FET to withstand it. A module lifetime level of fault events is established based upon the durability of the FET . If the total tolerance level is determined to be 600 fault events, the 3 predefined levels would be 200, 400 and 600 fault events.
When each tolerance level is reached, the short circuit DTC that was stored on the first failure cannot be cleared by a command to clear the continuous DTCs. The module does not allow this code to be cleared or the circuit restored to normal operation until a successful self-test proves that the fault has been repaired. After the self-test has successfully completed (no on-demand DTCs present), DTC B106E and the associated DTC (the DTC related to the shorted circuit) automatically clears and the circuit function returns.
When each level is reached, the DTC associated with the short circuit sets along with DTC B106E. These DTCs can be cleared using the module on-demand self-test, then the Clear DTC operation on the scan tool (if the on-demand test shows the fault corrected). The module never resets the fault event counter to zero and continues to advance the fault event counter as short circuit fault events occur.
If the number of short circuit fault events reach the third level, then DTCs B106F and B1342 set along with the associated short circuit DTC. DTC B106F cannot be cleared and the module must be replaced after the repair.
Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage. VISUAL INSPECTION Electrical Smart Junction Box (SJB) fuse 5 (10A) Wiring, terminals or connectors
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
- If the scan tool does not communicate with the VCM check the VCM connection to the vehicle. check the scan tool connection to the VCM . refer to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article, No Power To The Scan Tool, to diagnose no power to the scan tool.
- If the scan tool does not communicate with the vehicle: verify the ignition is ON. The air bag warning indicator prove-out confirms ignition ON (other indicators may not prove ignition ON). If the ignition does not turn on, refer to «STEERING COLUMN SWITCHES»(/mercury/mariner/ii-2011-2011/remont/ignition-switchsteering-lock/#steering-column-switches) article to diagnose no power in RUN. verify the scan tool operation with a known good vehicle. refer to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article to diagnose no response from the PCM.
- Carry out the network test: If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article. If the network test passes, retrieve and record the continuous memory DTCs.
- Clear the continuous DTCs and carry out the self-test diagnostics for the SJB .
- If the DTCs retrieved are related to the concern, go to «DTC CHARTS»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module) . For all other DTCs, refer to the «DIAGNOSTIC TROUBLE CODE (DTC) CHART»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module__diagnostic-trouble-code-dtc-chart) in this section.
- If no DTCs related to the concern are retrieved, verify the symptom. GO to «SYMPTOM CHART»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module__symptom-chart) .
Smart Junction Box (SJB) DTC Chart
| DTC | Description | Action |
|---|---|---|
| B106B | Tire Pressure Sensor Low Battery | REFER to TIRES & WHEELS article. |
| B106D | Tire Pressure Monitor System (TPMS) Initiators Not Configured | REFER to TIRES & WHEELS article. |
| B106E | Solid State Driver Disabled Due to Short Circuit | GO to PINPOINT TEST A . |
| B106F | Module Disabled Due to External Fault | GO to PINPOINT TEST A . |
| B1138 | Memory Full | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B1139 | Invalid Transmitter Identification Code | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B1302 | Accessory Delay Relay Coil Circuit Failure | REFER to WINDOWS & GLASS - GLASS, FRAMES & MECHANISMS article. |
| B1304 | Accessory Delay Relay Coil Circuit Short to Battery | REFER to WINDOWS & GLASS - GLASS, FRAMES & MECHANISMS article. |
| B1317 | Battery Voltage High | GO to PINPOINT TEST B . |
| B1318 | Battery Voltage Low | GO to PINPOINT TEST C . |
| B1320 | Driver Door Ajar Circuit Open | REFER to INTERIOR LIGHTING SYSTEM article. |
| B1328 | Passenger Door Ajar Circuit Open | REFER to INTERIOR LIGHTING SYSTEM article. |
| B1336 | Door Ajar RR Circuit Open | REFER to INTERIOR LIGHTING SYSTEM article. |
| B1342 | ECU is Faulted | DIAGNOSE all other DTCs first. If no other DTCs are present, INSTALL a new SJB . REFER to SMART JUNCTION BOX (SJB) in this section. TEST the system for normal operation. |
| B1352 | Ignition Key-In Circuit Failure | REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article. |
| B1472 | Lamp Headlamp Input Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B1485 | Brake Pedal Input Short to Battery | Section 417-01 . |
| B1510 | Flash to Pass Switch Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B1572 | Door Ajar LR Circuit Open | REFER to INTERIOR LIGHTING SYSTEM article. |
| B1578 | Lamp Park Input Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B1624 | Lamp Keypad Output Open Circuit | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B1626 | Lamp Keypad Output Short Circuit to Ground | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B1685 | Lamp Dome Input Circuit Failure | REFER to INTERIOR LIGHTING SYSTEM article. |
| B1688 | Lamp Dome Input Circuit Short To Ground | REFER to INTERIOR LIGHTING SYSTEM article. |
| B1696 | Autolamp On Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B1791 | Autolamp Sensor Input Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B1793 | Autolamp Sensor Input Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2008 | Wipers On Signal Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2044 | Left Rear Stop Lamp Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2045 | Left Rear Stop Lamp Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2046 | Right Rear Stop Lamp Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2047 | Right Rear Stop Lamp Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2048 | Left Rear Turn Lamp Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2050 | Right Rear Turn Lamp Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2071 | Hazard Switch Signal Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2077 | Liftgate Ajar Sw Circuit Failure | REFER to INTERIOR LIGHTING SYSTEM article. |
| B2212 | Panel Dim Switch Out of Range | REFER to INSTRUMENT CLUSTER ILLUMINATION & INSTRUMENT PANEL ILLUMINATION article. |
| B2254 | Front Fog Lamp Switch Failure | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2276 | Less Than 2 Transmitters Programmed | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B2281 | Right Turn Switch Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2282 | Left Turn Switch Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2425 | Remote Keyless Entry Out of Synchronization | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B2477 | Module Configuration Failure | CARRY OUT Programmable Module Installation (PMI) on the SJB . REFER to MODULE CONFIGURATION article. |
| B2479 | Park Brake Switch Circuit Short to Ground | REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article. |
| B2498 | Headlamp Switch Multiple Signals Input Active | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2572 | Brake Shift Interlock Output Circuit Failure | REFER to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - 6F35 article or AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - HYBRID article. |
| B2666 | Liftgate Release Switch Circuit Failure | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B2667 | Liftglass Release Switch Circuit Failure | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B273A | Liftgate Release Output Circuit Shorted to Ground | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B273B | Liftgate Release Output Circuit Open or Shorted to Battery Voltage | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B2844 | Ignition Fault | REFER to STEERING COLUMN SWITCHES article. |
| B2868 | Left Front Tire Pressure Sensor Fault | REFER to TIRES & WHEELS article. |
| B2869 | Right Front Tire Pressure Sensor Fault | REFER to TIRES & WHEELS article. |
| B2870 | Right Rear Tire Pressure Sensor Fault | REFER to TIRES & WHEELS article. |
| B2871 | Left Rear Tire Pressure Sensor Fault | REFER to TIRES & WHEELS article. |
| B2872 | Tire Pressure Sensor Fault | REFER to TIRES & WHEELS article. |
| B287A | Tire Pressure System Fault | REFER to TIRES & WHEELS article. |
| B2A20 | Ignition Stuck In START | REFER to STEERING COLUMN SWITCHES article. |
| B2A21 | One or More Configuration Files Missing or Corrupt | CARRY OUT Programmable Module Installation (PMI) on the SJB . REFER to MODULE CONFIGURATION article. CLEAR the DTCs. REPEAT the self-test. If DTC B2A21 is retrieved again, INSTALL a new SJB . REFER to SMART JUNCTION BOX (SJB) in this section. TEST the system for normal operation. |
| B2A22 | Headlamp OFF Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A23 | High Beam Input Circuit Short To Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A24 | Turn Signal Input Circuit Failure | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A25 | Trim Panel Lock Switch Circuit Failure | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B2A26 | Keypad Switch Circuit Failure | REFER to HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM article. |
| B2A27 | Right Front Turn Lamp Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A28 | Right Front Turn Lamp Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A29 | Left Front Turn Lamp Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A2A | Left Front Turn Lamp Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A2B | Left Corner Lamp Output Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A2C | Right Corner Lamp Output Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A2E | Right Front Lamp Low Beam Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A2F | Right Front Lamp Low Beam Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A30 | Left Front Lamp Low Beam Circuit Open | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A31 | Left Front Lamp Low Beam Circuit Short to Ground | REFER to EXTERIOR LIGHTING SYSTEM article. |
| B2A32 | LED Backlighting Output Circuit Open | REFER to INSTRUMENT CLUSTER ILLUMINATION & INSTRUMENT PANEL ILLUMINATION article. |
| B2A33 | LED Backlighting Output Circuit Short to Ground | REFER to INSTRUMENT CLUSTER ILLUMINATION & INSTRUMENT PANEL ILLUMINATION article. |
| B2A35 | Interior Lighting Output Circuit Open | REFER to INTERIOR LIGHTING SYSTEM article. |
| B2A36 | Interior Lighting Output Circuit Short to Ground | REFER to INTERIOR LIGHTING SYSTEM article. |
| C1125 | Brake Fluid Level Sensor Input Circuit Failure | REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article. |
| C2780 | ECU in Manufacturer Sub-State | REFER to TIRES & WHEELS article. |
| P062F | Internal Control Module EEPROM Error | CARRY OUT Programmable Module Installation (PMI). REFER to MODULE CONFIGURATION article. CLEAR the DTCs. REPEAT the self-test. If DTC P062F is retrieved again, INSTALL a new SJB . REFER to SMART JUNCTION BOX (SJB) in this section. TEST the system for normal operation. |
| U0155 | Lost Communication with Instrument Panel Cluster (IC) Control Module | GO to PINPOINT TEST D . |
| U2050 | No Application Present | CARRY out Programmable Module Installation (PMI) for the SJB . REFER to MODULE CONFIGURATION article. CLEAR the DTCs. REPEAT the self-test. If DTC U2050 is retrieved again, INSTALL a new SJB . REFER to SMART JUNCTION BOX (SJB) in this section. TEST the system for normal operation. |
| U2472 | Unexpected Ignition State | REFER to STEERING COLUMN SWITCHES article. |
| U2473 | Unexpected Vehicle Speed (VSS) | NOTE: Sets during the self-test if vehicle speed exceeds 3 mph (5 kph) or vehicle speed cannot be determined by the SJB . VERIFY the speedometer operates correctly.If the speedometer does not operate correctly, REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article.If the speedometer operates correctly, the self-test is carried out while the vehicle is moving. STOP the vehicle and REPEAT the self-test. |
| NOTE |
|---|
| Sets during the self-test if vehicle speed exceeds 3 mph (5 kph) or vehicle speed cannot be determined by the SJB . |
SMART JUNCTION BOX (SJB) DTC CHART
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| No communication with the Smart Junction Box (SJB) | Fuse Wiring, terminals or connectors SJB | REFER to MODULE COMMUNICATIONS NETWORK article, The SJB Does Not Respond To The Scan Tool. |
SYMPTOM CHART
Normal Operation
The Smart Junction Box (SJB) controls the output of several vehicle systems by means of solid state drivers. A DTC sets when an overload occurs on any of these drivers. The module also tracks the number of repetitive faults on each of these circuits, and then it compares said number of overloads to 3 progressive thresholds established for each circuit. If the third threshold has not been met, the DTC for the affected circuit can be cleared by eliminating the fault, clearing the DTCs and then running a self-test.
At the point that each of the first 2 thresholds is met, DTC B106E sets along with a DTC related to the affected circuit. Once the final (third) threshold has been met, the affected output is permanently disabled, and DTC B106F sets, at which time the SJB must be replaced.
- DTC B106E (Solid State Driver Disabled Due to Short Circuit) - a continuous DTC that sets when the SJB has disabled an output circuit due to a repetitive fault that overloads said circuit. A corresponding DTC for the circuit in question is also set.
- DTC B106F (Module Disabled Due to External Fault) - a continuous DTC that sets when the SJB has permanently disabled one or more output functions due to a repetitive circuit overload. DTC B1342 also sets at this time.
When DTC B1342 is set because the module has reached a third threshold and the SJB has permanently disabled an output, no DTCs can be cleared from the SJB . Using the module self-test to confirm a repair is not possible and a measurement using a digital multimeter of the affected output circuit is required to make sure the fault condition no longer exists.
This pinpoint test is intended to diagnose the following
- Output circuit short
- SJB
PINPOINT TEST A: DTCs B106E, B106F
- A1 REVIEW THE DTCs NOTE: First follow the necessary diagnostics to resolve DTC B106E and any other present DTCs (ignoring B106F). DTC B106E is only present when there is another DTC due to software or circuitry issues that must be resolved before another self-test is run. DTC B106F is only present once the final threshold has been met. Failure to correct the fault condition first may cause damage to the new SJB, resulting in a repeat repair. Review the DTCs from the SJB self-test. Are any other DTCs present, besides B106E, B106F or B1342? Yes CORRECT the DTCs. REFER to the «SMART JUNCTION BOX (SJB)»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module) DTC chart in this section. After the repair, GO to A2 . No GO to A2 .
- A2 REPEAT THE SJB SELF-TEST Ignition ON. Enter the following diagnostic mode on the scan tool: SJB Self-Test. Clear the DTCs and repeat the SJB self-test. Is DTC B106F or DTC B1342 present? YES INSTALL a new SJB . REFER to «SMART JUNCTION BOX (SJB)»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module) in this section. TEST the system for normal operation. No The system is operating correctly at this time. The circuit short has been repaired.
Pinpoint Test B: DTC B1317
Refer to SYSTEM WIRING DIAGRAMS article, Power Distribution/SJB for schematic and connector information.
- DTC B1317 (Battery Voltage High) - a continuous and on-demand DTC that sets when the SJB detects battery voltage above 15.5 volts.
This pinpoint test is intended to diagnose the following
- Charging system concern
- SJB
Note. DTC B1317 may be stored in the module memory due to previous battery charging or vehicle jump starting events.
- B1 CHECK FOR DTC B1317, B1676 OR P0563 SET IN OTHER MODULES Ignition ON. Enter the following diagnostic mode on the scan tool: (All CMDTCs) Self-Test. Retrieve the continuous memory DTCs from all modules. Is DTC B1317, B1676 or P0563 (PCM) set in more than one module? Yes REFER to «CHARGING SYSTEM»(/mercury/mariner/ii-2011-2011/remont/charging-system/#charging-system) article to diagnose an overcharging condition. No GO to B2 .
- B2 CHECK THE BATTERY VOLTAGE Turn off all interior/exterior lights and accessories. Start and run the engine at approximately 2,000 rpm for 3 minutes while monitoring the battery voltage. Does the battery voltage rise to 15.5 volts or higher? YES REFER to «CHARGING SYSTEM»(/mercury/mariner/ii-2011-2011/remont/charging-system/#charging-system) article to diagnose an overcharging condition. No GO to B3 .
- B3 RECHECK FOR DTC B1317 Turn the engine off. Ignition ON. Enter the following diagnostic mode on the scan tool: SJB Self-Test. Clear the continuous memory DTCs. Carry out the SJB self-test. Is DTC B1317 present? YES INSTALL a new SJB . REFER to «SMART JUNCTION BOX (SJB)»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module) in this section. TEST the system for normal operation. No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
Pinpoint Test C: DTC B1318
Refer to SYSTEM WIRING DIAGRAMS article, Power Distribution/SJB for schematic and connector information.
- DTC B1318 (Battery Voltage Low) - a continuous and on-demand DTC that sets when the SJB detects battery voltage below 10 volts.
This pinpoint test is intended to diagnose the following
- Wiring, terminals or connectors
- High circuit resistance
- SJB
Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Note. Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, BATTERY MOUNTING SYSTEM & BATTERY CABLES article.
Scheme 170
Scheme 171
- C1 RECHECK THE SJB DTCs Ignition ON. Enter the following diagnostic mode on the scan tool: SJB Self-Test. Clear the DTCs. Repeat the SJB self-test. Is DTC B1318 still present? Yes GO to C2 . No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
- C2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM Enter the following diagnostic mode on the scan tool: PCM Self-Test. Retrieve the continuous memory DTCs from the PCM. Is DTC P0620, P0625, P0626 or P065B set in the PCM? YES REFER to «CHARGING SYSTEM»(/mercury/mariner/ii-2011-2011/remont/charging-system/#charging-system) article. No GO to C3 .
- C3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE Ignition OFF. Check the battery condition and verify the battery is fully charged. Refer to «BATTERY, BATTERY MOUNTING SYSTEM & BATTERY CABLES»(ref-434539) article, Battery Condition Test. Is the battery OK and fully charged? YES GO to C4 . No REFER to «CHARGING SYSTEM»(/mercury/mariner/ii-2011-2011/remont/charging-system/#charging-system) article.
- C4 CHECK THE SJB VOLTAGE SUPPLY Measure and record the voltage at the battery. Disconnect: SJB C2280G. Ignition ON. Measure the voltage between the SJB C2280G-1, circuit SBB02 (YE/RD), harness side and ground. Is the voltage within 0.2 volt of the recorded battery voltage? YES GO to C5 . No REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.
- C5 CHECK THE SJB GROUND CIRCUIT Ignition OFF. Disconnect: Negative Battery Cable. Disconnect: SJB C2280D. Measure the resistance between the SJB C2280D-7, 8, 12, and 24, circuit GD182 (BK/GY), harness side and ground. Is the resistance less than 5 ohms? YES CONNECT the negative battery cable. GO to C6 . No REPAIR the circuit for high resistance. CONNECT the negative battery cable. TEST the system for normal operation.
- C6 CHECK FOR CORRECT SJB OPERATION Disconnect the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? YES INSTALL a new SJB. REFER to «SMART JUNCTION BOX (SJB)»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module) in this section. TEST the system for normal operation. No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
Pinpoint Test D: DTC U0155
Refer to SYSTEM WIRING DIAGRAMS article, Module Communications Network for schematic and connector information.
- DTC U0155 (Lost Communication With Instrument Panel Cluster (IC) Control Module) - a continuous DTC that sets when the SJB does not receive messaged data (loses communication) from the Instrument Panel Cluster (IPC) for longer than 5 minutes.
This pinpoint test is intended to diagnose the following
- Module communication
- IC
- SJB
- D1 VERIFY CUSTOMER CONCERN Ignition ON. Verify that there is an observable symptom present. Is an observable symptom present? Yes GO to D2 . No The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
- D2 CHECK THE COMMUNICATION NETWORK Ignition ON. Enter the following diagnostic mode on the scan tool: Network Test. Carry out the network test. Does the IC pass the network test? YES GO to D3 . No REFER to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article.
- D3 RETRIEVE THE RECORDED DTCs FROM THE SELF-TEST Check for recorded SJB DTCs from the self-test. Is DTC B1317 or DTC B1318 recorded? YES For DTC B1317, GO to «PINPOINT TEST B»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module__pinpoint-test-b-dtc-b1317) . For DTC B1318, GO to «PINPOINT TEST C»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module__pinpoint-test-c-dtc-b1318) . No GO to D4 .
- D4 RECHECK THE SJB DTCs Clear the DTCs. Repeat the SJB self-test. Is DTC U0155 still present? YES GO to D5 . No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
- D5 CHECK FOR DTC U0155 OR DTC U0155: 00 IN OTHER MODULES NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during Programmable Module Installation (PMI) or the PMI may not have been carried out. Clear all DTCs. Ignition OFF. Ignition ON. Wait 10 seconds. Enter the following diagnostic mode on the scan tool: Self-Test. Retrieve the continuous memory DTCs from all modules. Is DTC U0155 or DTC U0155: 00 set in any other module? YES INSTALL a new IC. REFER to «INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES»(/mercury/mariner/ii-2011-2011/remont/gauges-instrument-panels/#instrumentation-system-message-center-warning-chimes) article. TEST the system for normal operation. No INSTALL a new SJB. REFER to «SMART JUNCTION BOX (SJB)»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#multifunction-electronic-module) in this section. TEST the system for normal operation.
SPECIAL TOOLS Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
Scheme 172
| Item | Part Number | Description |
|---|---|---|
| 1 | Floor console Smart Junction Box (SJB) cover | |
| 2 | SJB electrical connector (part of 14A120) | |
| 3 | SJB electrical connectors (2 required) (part of 14290) | |
| 4 | SJB electrical connectors (2 required) (part of 14401) | |
| 5 | SJB electrical connectors (2 required) (part of 14405) | |
| 6 | W505423-S | SJB bolts (2 required) |
| 7 | 15604 | SJB |
ITEM DESCRIPTION
Removal
Note. 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 a scan tool. This information must be downloaded into the new Smart Junction Box (SJB) after installation. For additional information, refer to MODULE CONFIGURATION article. In the event that As-Built data is required (SJB does not communicate), all Remote Keyless Entry (RKE) devices must be programmed to the new SJB . A minimum of 2 RKE devices are necessary to complete the configuration and turn off the flashing interior lights. 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 8 pre-set DTCs related to the TPMS . To clear the 8 DTCs, successful configuration of the SJB must occur, followed by successful TPMS sensor training, and a successful self-test. The 8 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)
- B2A21 (One or More Configuration Files Missing or Corrupt)
- C2780 ( ECU in Manufacturer Sub-State)
Pinpoint Test D
Installation
Pinpoint Test D
See also:
• ANTI-LOCK BRAKE SYSTEM - VEHICLE DYNAMIC SYSTEM
• DRIVER INFORMATION SYSTEM & ENTERTAINMENT SYSTEM
• HIGH VOLTAGE TRACTION BATTERY
• INTRODUCTION
• CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS
• INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES
• CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - HYBRID
• PARKING AID
• ELECTRONIC ENGINE CONTROLS - 2.5L
• ELECTRONIC ENGINE CONTROLS - 3.0L (4V)
• ELECTRONIC ENGINE CONTROLS - HYBRID
• STEERING SYSTEM
• FOUR WHEEL DRIVE (4WD) SYSTEMS
• MODULE COMMUNICATIONS NETWORK
• STEERING COLUMN SWITCHES
• TIRES & WHEELS
• HANDLES, LOCKS, LATCHES & KEYLESS ENTRY SYSTEM
• WINDOWS & GLASS - GLASS, FRAMES & MECHANISMS
• INTERIOR LIGHTING SYSTEM
• EXTERIOR LIGHTING SYSTEM
• INSTRUMENT CLUSTER ILLUMINATION & INSTRUMENT PANEL ILLUMINATION
• AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - 6F35
• AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS - HYBRID
• CHARGING SYSTEM
• SMART JUNCTION BOX (SJB) DTC CHART
• DTC CHARTS
• DIAGNOSTIC TROUBLE CODE (DTC) CHART
• SYMPTOM CHART
• PINPOINT TEST A
• PINPOINT TEST B
• PINPOINT TEST C
• PINPOINT TEST D