Multifunction Electronic Module: Overview Ford Taurus VI

Principles of Operation

Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

Note. The time out for the battery saver relay and the accessory delay relay (both are controlled by the SJB ) is 1 minute if the vehicle has less than 80 km (50 miles). Once the vehicle passes the approximate mileage threshold of 80 km (50 miles), the time out for both relays is 10 minutes, as described in the Owner's Literature . For the battery saver relay, refer to INTERIOR LIGHTING . For the accessory delay relay, refer to GLASS, FRAMES AND MECHANISMS .

The SJB is a multifunction electronic module that controls many of the vehicle systems. Most of the SJB functions utilize hardwired inputs and/or outputs. The SJB controls the following hardwired functions, using the corresponding inputs and outputs

FUNCTION CHART

In addition, the SJB is involved in other vehicle systems through communication over the Medium Speed Controller Area Network (MS-CAN). For a detailed list of SJB network inputs and outputs, refer to the Principles of Operation in MODULE COMMUNICATIONS NETWORK .

Some SJB parameters are programmable. Two types of programmable parameters are available: vehicle configuration and customer preference. Refer to MODULE CONFIGURATION .

Field-Effect Transistor (FET) Protection

The SJB utilizes a Field-Effect Transistor (FET) protective circuit strategy for many of its outputs (for example, the 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 is detected. A continuous DTC is stored at that time of the fault. The circuit then resets after a customer demand of the function (switching the component on, battery saver being energized). When an excessive circuit load occurs several times, the module shuts down the output until a repair procedure is carried out. At the same time, the continuous 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 on-demand self-test proves that the fault has been repaired. After the on-demand self-test has successfully completed (no on-demand DTCs present), the continuous DTC clears and the circuit function returns.

Each circuit has 3 predefined levels of short circuit tolerance established in the module based on each circuits' capability. When the first or second level is reached, the continuous DTC associated with the circuit sets along with DTC B106E. These DTCs may be cleared using the Clear DTC operation on the scan tool as long as the fault itself has been corrected. If any of the circuits are shorted past the third level, then DTCs B106F and B1342 set along with the associated continuous DTC. This DTC cannot be cleared and the module must be replaced.

Normal Operation

When a repetitive fault causing a circuit overload is detected on certain output circuits, the Smart Junction Box (SJB) disables the circuit by removing voltage, or ground, to the affected circuit. The circuit remains disabled until the fault is corrected and the DTCs are cleared, and then the self-test is repeated. When the on-demand self-test has been run after all faults have been corrected, any DTCs related to the fault are cleared.

1. DTC B106E (Solid State Driver Disabled Due to Short Circuit) - a continuous DTC that sets when the SJB has disabled a circuit due to a repetitive fault causing a circuit overload.
2. DTC B106F (Module Disabled Due to External Fault) - a continuous DTC that sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F is set with DTC B106E. When DTC B106F is present, the SJB must be replaced after the fault condition has been corrected.

This pinpoint test is intended to diagnose the following

1. Output circuit short to ground or voltage
2. SJB

The Smart Junction Box (SJB) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1317 in continuous memory and on-demand if the SJB detects high battery voltage above 15.5 volts on circuit SBB01 (RD).

1. DTC B1317 (Battery Voltage High) - a continuous memory or on-demand DTC that sets when the SJB detects battery voltage above 15.5 volts on circuit SBB01 (RD).

This pinpoint test is intended to diagnose the following

1. Charging system concern
2. SJB

The Smart Junction Box (SJB) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1318 in continuous memory and on-demand if the SJB detects low battery voltage below 10 volts on circuit SBB01 (RD).

1. DTC B1318 (Battery Voltage Low) - a continuous memory or on-demand DTC that sets when the SJB detects battery voltage below 10 volts on circuit SBB01 (RD).

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. High circuit resistance
3. SJB

1. DTC U0155 (Lost Communication with Instrument Panel Cluster ( IC ) Control Module) - set by the Smart Junction Box (SJB) if IGN status message is present, and if messages are missing for 15 seconds or longer from the Instrument Cluster (IC) over the Medium Speed Controller Area Network (MS-CAN).

This pinpoint test is intended to diagnose the following

1. Module communication
2. SJB

Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The Driver Door Module (DDM) allows the driver to program a personalized seat position that can be recalled using the memory set switch or a Remote Keyless Entry (RKE) transmitter (part of the Integrated Keyhead Transmitter (IKT) [Passive Anti-Theft System (PATS) only] key or part of the Intelligent Access (IA) [ PATS with push button start] key). In addition to the position of the driver exterior mirror, the DDM also controls the position of the passenger exterior mirror and the adjustable pedals. The DDM is hardwired to the power mirror switch, driver exterior mirror, memory set switch and sends messages over the Medium Speed Controller Area Network (MS-CAN) to the Driver Seat Module (DSM) to adjust the passenger exterior mirror. Refer to HYDRAULIC BRAKE ACTUATION for information on the adjustable pedals. Refer to REAR VIEW MIRRORS for information on the exterior mirrors.

The SJB utilizes a Field-Effect Transistor (FET) protective circuit strategy for many of its outputs (for example, the 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 is detected. A continuous DTC is stored at that time of the fault. The circuit then resets after a customer demand of the function (switching the component on, battery saver being energized). When an excessive circuit load occurs several times, the module shuts down the output until a repair procedure is carried out. At the same time, the continuous 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 on-demand self-test proves that the fault has been repaired. After the on-demand self-test has successfully completed (no on-demand DTCs present), the continuous DTC clears and the circuit function returns.

Each circuit has 3 predefined levels of short circuit tolerance established in the module based on each circuits' capability. When the first or second level is reached, the continuous DTC associated with the circuit sets along with DTC B106E. These DTCs may be cleared using the Clear DTC operation on the scan tool as long as the fault itself has been corrected. If any of the circuits are shorted past the third level, then DTCs B106F and B1342 set along with the associated continuous DTC. This DTC cannot be cleared and the module must be replaced.

When a repetitive fault causing a circuit overload is detected on certain output circuits, the Driver Door Module (DDM) disables the circuit by removing voltage or ground to the affected circuit. The circuit remains disabled until the fault is corrected and an on-demand self-test is run. When the on-demand self-test has been run after all faults have been corrected, any DTCs related to the fault are cleared.

1. DTC B106E (Solid State Driver Disabled Due to Short Circuit) - a continuous DTC that sets when the DDM has disabled a circuit due to a repetitive fault causing a circuit overload.
2. DTC B106F (Module Disabled Due to External Fault) - a continuous DTC that sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F sets with DTC B106E. When DTC B106F is present, the DDM must be replaced after the fault condition has been corrected.

This pinpoint test is intended to diagnose the following

1. Output circuit short to ground or voltage
2. DDM

The Driver Door Module (DDM) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1317 in continuous memory if the DDM detects high battery voltage above 15 volts on circuit SBP13.

1. DTC B1317 (Battery Voltage High) - a continuous memory DTC that sets when the DDM detects battery voltage above 15 volts on circuit SBP13.

This pinpoint test is intended to diagnose the following

1. Charging system concern
2. DDM

The Driver Door Module (DDM) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1318 in continuous memory if the DDM detects low battery voltage below 10 volts on circuit SBP13.

1. DTC B1318 (Battery Voltage Low) - a continuous memory DTC that sets when the DDM detects battery voltage below 10 volts on circuit SBP13.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. High circuit resistance
3. DDM

The Driver Door Module (DDM) and the Smart Junction Box (SJB) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN for the purposes of determining what functions are being carried out.

1. DTC U0140 (Lost Communication With Body Control Module ( GEM )) - set by the DDM if data messages received from the SJB over the MS-CAN are missing for 15 seconds or longer.

This pinpoint test is intended to diagnose the following

1. Module communication
2. DDM
3. SJB

Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The Driver Seat Module (DSM) allows the driver to program a personalized seat position that can be recalled using the memory switch or a Remote Keyless Entry (RKE) transmitter (part of the key). In addition to the position of the driver seat, the DSM also controls the position of the exterior mirrors and the adjustable pedals. Refer to SEATING .

The DSM communicates on the Medium Speed Controller Area Network (MS-CAN), over which it receives the selected transmission gear message. All other functions of the DSM are hardwired.

The SJB utilizes a Field-Effect Transistor (FET) protective circuit strategy for many of its outputs (for example, the 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 is detected. A continuous DTC is stored at that time of the fault. The circuit then resets after a customer demand of the function (switching the component on, battery saver being energized). When an excessive circuit load occurs several times, the module shuts down the output until a repair procedure is carried out. At the same time, the continuous 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 on-demand self-test proves that the fault has been repaired. After the on-demand self-test has successfully completed (no on-demand DTCs present), the continuous DTC clears and the circuit function returns.

Each circuit has 3 predefined levels of short circuit tolerance established in the module based on each circuits' capability. When the first or second level is reached, the continuous DTC associated with the circuit sets along with DTC B106E. These DTCs may be cleared using the Clear DTC operation on the scan tool as long as the fault itself has been corrected. If any of the circuits are shorted past the third level, then DTCs B106F and B1342 set along with the associated continuous DTC. This DTC cannot be cleared and the module must be replaced.

When a repetitive fault causing a circuit overload is detected on certain output circuits, the Driver Seat Module (DSM) disables the circuit by removing voltage or ground to the affected circuit. The circuit remains disabled until the fault is corrected and an on-demand self-test is run. When the on-demand self-test has been run after all faults have been corrected, any DTCs related to the fault are cleared.

1. DTC B106E (Solid State Driver Disabled Due to Short Circuit) - a continuous DTC that sets when the DSM has disabled a circuit due to a repetitive fault causing a circuit overload.
2. DTC B106F (Module Disabled Due to External Fault) - a continuous DTC that sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F sets with DTC B106E. When DTC B106F is present, the DSM must be replaced after the fault condition has been corrected.

This pinpoint test is intended to diagnose the following

1. Output circuit short to ground or voltage
2. DSM

The Driver Seat Module (DSM) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1317 in continuous memory if the SJB detects high battery voltage above 15 volts on circuits CBX05 and CBX03.

1. DTC B1317 (Battery Voltage High) - a continuous memory DTC that sets when the DSM detects battery voltage above 15 volts on circuits CBX05 and CBX03.

This pinpoint test is intended to diagnose the following

1. Charging system concern
2. DSM

The Driver Seat Module (DSM) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1318 in continuous memory if the DSM detects low battery voltage below 10 volts on circuits CBX05 and CBX03.

1. DTC B1318 (Battery Voltage Low) - a continuous memory DTC that sets when the DSM detects battery voltage below 10 volts on circuits CBX05 and CBX03.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. High circuit resistance
3. DSM

The Driver Seat Module (DSM) and the Smart Junction Box (SJB) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN .

1. DTC U0140 (Lost Communication With Body Control Module ( GEM )) - set by the DSM whenever it has lost communication to the SJB for 15 seconds or longer as long as the module voltage is between 10 and 15 volts.

This pinpoint test is intended to diagnose the following

1. Module communication
2. DSM
3. SJB

The Driver Seat Module (DSM) and the Instrument Panel Cluster (IPC) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN .

1. DTC U0155 (Lost Communication with Instrument Panel Cluster (IC) Control Module) - set by the DSM if IGN status message is present, the DSM supply voltage is greater than 10.5 volts, the ignition must be in the on position for a minimum of 5 seconds and if messages are missing for 15 seconds or longer from the IPC over the MS-CAN .

This pinpoint test is intended to diagnose the following

1. Module communication
2. DSM
3. IPC

Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The Remote Function Actuator (RFA) module is a multifunction electronic module that controls many of the vehicle systems. The RFA module communicates on both the Medium Speed Controller Area Network (MS-CAN) and the High Speed Controller Area Network (HS-CAN). Most of the RFA module functions utilize hardwired inputs and/or outputs. The RFA module controls the following hardwired functions

1. Anti-theft perimeter alarm
2. Intelligent Access (IA)
3. Keyless entry keypad
4. Luggage compartment lid release
5. Passive Anti-Theft System (PATS)
6. Power door locks
7. Remote Keyless Entry (RKE) system
8. RKE transmitter (part of the IA key)

In addition, the RFA module communicates with other modules over the MS-CAN and the HS-CAN .

Some RFA module parameters are programmable. The factory set 5-digit permanent entry code from the SJB must be configured into a new RFA module after installation. Two types of programmable parameters are available: vehicle configuration and customer preference. Refer to MODULE CONFIGURATION .

The SJB utilizes a Field-Effect Transistor (FET) protective circuit strategy for many of its outputs (for example, the 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 is detected. A continuous DTC is stored at that time of the fault. The circuit then resets after a customer demand of the function (switching the component on, battery saver being energized). When an excessive circuit load occurs several times, the module shuts down the output until a repair procedure is carried out. At the same time, the continuous 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 on-demand self-test proves that the fault has been repaired. After the on-demand self-test has successfully completed (no on-demand DTCs present), the continuous DTC clears and the circuit function returns.

Each circuit has 3 predefined levels of short circuit tolerance established in the module based on each circuits' capability. When the first or second level is reached, the continuous DTC associated with the circuit sets along with DTC B106E. These DTCs may be cleared using the Clear DTC operation on the scan tool as long as the fault itself has been corrected. If any of the circuits are shorted past the third level, then DTCs B106F and B1342 set along with the associated continuous DTC. This DTC cannot be cleared and the module must be replaced.

The Remote Function Actuator (RFA) module and the PCM communicate using the High Speed Controller Area Network (HS-CAN). Messages are exchanged between the modules on the HS-CAN .

1. DTC U0100:87 (Lost Communication With ECM /PCM "A": Missing Message) - set by the RFA module if more than 62 messages in a row from the PCM over the HS-CAN are missing.

This pinpoint test is intended to diagnose the following

1. Module communication
2. RFA module
3. PCM

The Remote Function Actuator (RFA) module and the Smart Junction Box (SJB) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN .

1. DTC U0140:87 (Lost Communication With Body Control Module: Missing Message) - set by the RFA module if more than 10 messages in a row from the SJB over the MS-CAN are missing.

This pinpoint test is intended to diagnose the following

1. Module communication
2. RFA module
3. SJB

The Remote Function Actuator (RFA) module and the Instrument Panel Cluster (IPC) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN .

1. DTC U0155:87 (Lost Communication With Instrument Panel Cluster ( IPC ) Control Module: Missing Message) - set by the RFA module if more than 2500 ms of the DRV_SELECT_STATUS or more than 300 Engine_Data messages missed in 5 minutes from the IPC over the MS-CAN .

This pinpoint test is intended to diagnose the following

1. Module communication
2. IPC
3. RFA module

The Remote Function Actuator (RFA) module and the Instrument Panel Cluster (IPC) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN .

1. DTC U0423:68 (Invalid Data Received From Instrument Panel Cluster ( IPC ) Control Module: Event Information) - set by the RFA module if more than 2500 ms of the DRV_SELECT_RANGE or more than 300 Engine_Data messages are invalid in 5 minutes from the IPC over the MS-CAN .

This pinpoint test is intended to diagnose the following

1. Module communication
2. IPC
3. RFA module

The Remote Function Actuator (RFA) module and the Driver Seat Module (DSM) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages are exchanged between the modules on the MS-CAN .

1. DTC U049A:68 (Invalid Data Received From "Door Control Module A": Event Information) - set by the RFA module if more than 2500 ms of the Driver_Lock_Switch_Status with data is invalid from the DSM over the MS-CAN .

This pinpoint test is intended to diagnose the following

1. Module communication
2. DSM
3. RFA module

When a repetitive fault causing a circuit overload is detected on certain output circuits, the Remote Function Actuator (RFA) module disables the circuit by removing voltage or ground to the affected circuit. The circuit remains disabled until the fault is corrected and the DTCs are cleared, and then the self-test is repeated. When the on-demand self-test has been run after all faults have been corrected, any DTCs related to the fault are cleared.

1. DTC U1000:00 (Solid State Driver Protection Active - Driver Disabled: No Sub Type Information) - a continuous DTC that sets when the RFA module has disabled a circuit due to a repetitive fault causing a circuit overload.
2. DTC U3000:49 (Control Module: Internal Electronic Failure) - a continuous DTC that sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC U3000:49 sets with DTC U1000:00. When DTC U3000:49 is present, the RFA module must be replaced after the fault condition has been corrected.

This pinpoint test is intended to diagnose the following

1. Output circuit short to ground or voltage
2. RFA module