419-10 Módulos eletrônicos multifunção

419-10-1 Multifunction Electronic Modules 419-10-1 . SECTION 419-10 Multifunction Electronic Modules VEHICLE APPLICATION: 2011.50 Ranger CONTENTS DESCRIPTION AND OPERATION Module Controlled Functions.............................................................................................. Overview............................................................................................................................. Body control module (BCM)............................................................................................... Emergency function............................................................................................................ Light switch......................................................................................................................... Combined rain sensor/light sensor..................................................................................... Sunload Sensor.................................................................................................................. Automatic headlamps......................................................................................................... Headlamp switch-off delay................................................................................................. Interior lighting.................................................................................................................... Heated windscreen............................................................................................................. Heated rear window and heated external mirrors.............................................................. Windshield wash/wipe system............................................................................................ Central door locking............................................................................................................ Smart Charge system......................................................................................................... Ignition overload protection................................................................................................ Electric window regulators.................................................................................................. Speed control..................................................................................................................... Brake fluid level.................................................................................................................. Power management........................................................................................................... Immobiliser......................................................................................................................... Central module configuration.............................................................................................. VIN identification................................................................................................................. Climate control.................................................................................................................... REMOVAL AND INSTALLATION Body Control Module (BCM)............................................................................................... PAGE 419-10-2 419-10-2 419-10-3 419-10-3 419-10-4 419-10-4 419-10-4 419-10-4 419-10-5 419-10-5 419-10-5 419-10-6 419-10-6 419-10-7 419-10-9 419-10-9 419-10-9 419-10-10 419-10-10 419-10-10 419-10-10 419-10-11 419-10-11 419-10-11 419-10-12

419-10-2 Multifunction Electronic Modules 419-10-2 DESCRIPTION AND OPERATION Module Controlled Functions Overview 1 17 16 15 14 13 12 E137758 2 5 3 4 6 7 8 10 11

419-10-3 Multifunction Electronic Modules 419-10-3 DESCRIPTION AND OPERATION Item Description 1 HS CAN bus 2 MS CAN bus 3 Gateway (BCM) 4 %&0 5 Front window wiper motors 6 Headlamp 7 Window washer pump 8 Stoplamp switch Ignition lock 10 Fuel level sensor 11 Instrument cluster 12 PATS transceiver (vehicles without keyless vehicle module only) 13 Multifunction switch 14 Speed control switch 15 Hazard flasher switch 16 Brake fluid level switch 17 Light/rain sensor Body control module (BCM) E139764 The body control module is installed on the driver's side of the vehicle underneath the dash panel. It replaces separate components such as the central locking module, the timer relay and the fuse box in the passenger compartment. It consists of a power distribution section (including fuses and relays) and an electronic control module, which controls the operation of most of the vehicle's electronic systems. New vehicles are supplied with different versions of the BCM (depending on the equipment specification of the vehicle). When installing a replacement BCM it needs to be configured for the specific vehicle. The following functions are controlled or executed by the BCM if the battery voltage is between 9 and 16 V. ‡ Battery saving function ‡ Current distribution ‡ Exterior lighting ‡ Interior lighting ‡ Wiper system ‡ Washer fluid level indicator ‡ Window heating (heated windshield, heated rear window, heated exterior mirrors) ‡ Speed control system (reads the speed control switches and transmits signals on the CAN bus) ‡ Locking / Unlocking ‡ Anti-theft ‡ Air conditioning controls (partial) ‡ Handbrake (it monitors the switch and transmits the signal on the CAN bus) ‡ Monitoring of the brake fluid level. ‡ Electric fuel pump (mechanical fuel pump on diesel engines is not BCM controlled) ‡ Fuel level indicator ‡ Battery charging (smart charge, partially) ‡ Electric booster heater ‡ Brake pedal position (BPP) switch. ‡ Communications via the high speed CAN bus (HS-CAN) and mid-speed CAN bus (MS-CAN) ‡ Main module in the LIN bus system ‡ PATS (interface for transceiver) ‡ BTSI (brake transmission shift interlock) ‡ Central module configuration ‡ Power management (vehicle mode) The BCM can be diagnosed via the diagnostic tool. Furthermore, an integrated service mode enables testing of the input and output signals without the need for further tools. Emergency function The BCM is equipped with restricted emergency running functions on all vehicles. A monitoring function within the BCM is sent a control signal at regular intervals by the

419-10-4 Multifunction Electronic Modules 419-10-4 DESCRIPTION AND OPERATION microcontroller. If this control signal is not sent, the BCM goes into emergency running mode after a specified time. In this case, vehicle electrical functions will be restricted to the following: ‡ Stop light will function normally. ‡ Horn will function normally. ‡ Dipped beam and position lamps will be switched on permanently, irrespective of light switch position. ‡ Windscreen wipers will perform continuous wiping at normal wipe speed, irrespective of wiper switch position. The emergency running mode is switched off when the ignition is switched to "0". When the ignition is switched on again, the BCM will try to recover. If recovery fails, the vehicle cannot be started. Light switch If the ignition lock is in position "0" for more than 3 minutes then the front fog lamps, rear fog lamp and the main beam headlamps are deactivated when the ignition is next switched on (if they were previously activated). Combined rain sensor/light sensor The combined rain sensor/light sensor is attached to the windshield, near the interior rear view mirror. 1 2 3 E40968 Item Description 1 Lens 2 Front light sensor 3 Ambient light sensor The ambient light sensor determines the general light intensity. For this purpose, it detects the light over as wide an angle as possible, without taking the direction of incidence into account. The front light sensor determines the light intensity directly in front of the vehicle. Sunload Sensor E140027 The sunload sensor is positioned centrally on the dashboard. The sunload sensor measures the intensity of the sunlight reaching the vehicle. Automatic headlamps The low beams, side lamps, license plate lamps as well as the instrument cluster and instrument panel illumination are switched on automatically if all the following conditions are met: ‡ Ignition switch in the "II" or "III" position ‡ Light switch in the "AUTO" position ‡ Detected ambient light conditions below a stored threshold value They are switched on or off by the BCM depending on the input signals of the combined rain sensor/light sensor(s). If both the ambient light sensor and the front light sensor simultaneously detect a sudden reduction in light intensity then algorithm-based calculations are performed to determine that the vehicle has entered a tunnel, multi-storey car park or a long underpass. In this type of case a request to switch on the exterior lights and the display lamps in the instrument cluster is transmitted to the BCM. If the vehicle is suddenly thrown into the shade by a large truck, the two sensors will register different light intensities. In this case, the algorithm-based

419-10-5 Multifunction Electronic Modules 419-10-5 DESCRIPTION AND OPERATION calculation will not result in the lights being switched on. Headlamp switch-off delay The headlamp switch-off delay utilizes the low beam together with the peripheral lights (if equipped) to illuminate the area surrounding the vehicle. The function is activated by operating the high beam lever when the ignition switch is in the "0" position and the light switch is in the "AUTO" position. After the last door has been closed, the function remains active for a further 30 seconds and then switches off automatically. When a door or the tailgate is open, the switch-off time is extended to 180 seconds. After the last door has been closed, the switch-off time is reset to 30 seconds. The headlamp switch-off delay can be deactivated prematurely by operating the high beam lever again or by switching on the ignition. The switch-off time is set to the above values at the factory, and can be changed in the central module configuration by a Ford dealer. Interior lighting Depending on the vehicle specification, the interior lighting which is controlled by the BCM may include: ‡ Left and right-hand footwell lamps ‡ Front and rear dome lamps (in "door contact" switch position) Depending upon vehicle specification, the interior lamps which can be switched by the operator include: ‡ Front and rear dome lamps (in "On" switch position) ‡ Map lights ‡ Glove compartment lamp The BCM-controlled interior lighting is switched on with dimmed brightness if one of the following conditions is satisfied: ‡ One of the vehicle's doors is opened. ‡ The ignition key is in the "0" or "I" position and the vehicle is unlocked. ‡ The ignition key is turned from the "II" to the "I" or "0" position. The BCM-controlled interior lighting is switched off if all of the doors are closed and one of the following conditions is satisfied: ‡ 25 seconds have elapsed since the last door was closed. ‡ The ignition key is turned from the "0" or "I" to the "II" position. ‡ The ignition key is in the "0" or "I" position while the vehicle is locked. The duration of the dimmer function is 1.7 seconds in both the switch-on and switch-off phases. The dimmer function is not used if the interior lighting is switched off by the battery saving function after 30 minutes. Heated windscreen The heated windshield is switched on by the BCM under the following conditions: ‡ The heated windshield switch is operated, the ignition switch is in position "II" and the charge warning lamp is switched off. ‡ The "Defrost" function of the climate control has been activated, the ignition switch is in position "II" and the charge warning lamp is switched off. The heated windshield is switched off by the BCM under the following conditions: ‡ More than 4 minutes have elapsed since the switch for the heated windshield was operated. ‡ The engine is switched off. ‡ The "Defrost" function is deactivated or the switch for the heated windshield is pressed again while the heated windshield is still switched on. ‡ The charging system warning indicator is switched on. ‡ The battery voltage has dropped below 10.3 V for more than 20 seconds (power management strategy). Manual requests for switching on the heated windshield by pressing the switch, are ignored at this time. If the battery voltage returns to the normal range then the disabling of the heated windshield is cancelled - the heated windhsield is then in a switched-off state.

419-10-6 Multifunction Electronic Modules 419-10-6 DESCRIPTION AND OPERATION Heated rear window and heated external mirrors The heated rear window and the heated exterior mirrors are switched on by the BCM under the following conditions: ‡ The heated rear window switch is operated, the ignition switch is in position "II" and the charge warning lamp is switched off. ‡ The "Defrost" function of the climate control has been activated, the ignition switch is in position "II" and the charge warning lamp is switched off. The heated rear window and the heated exterior mirrors are switched off by the BCM under the following conditions: ‡ More than 4 minutes have elapsed since the switch for the heated rear window was operated. ‡ The engine is switched off. ‡ While the heated rear window is switched on, the switch for the heated rear window is pressed or the "Defrost" function of the climate control is deactivated. ‡ The battery voltage has dropped below 10.3 V for more than 20 seconds (power management strategy). Manual requests for switching on the heated rear window by pressing the switch, are ignored at this time. If the battery voltage returns to the normal range then the disabling of the heated rear window is cancelled - the heated rear window is then in a switched-off state. Windshield wash/wipe system The windshield wiper system is equipped with just one wiper motor, and this motor is connected to the BCM via a simple cable connection. The windshield wash/wipe system will only operate if the ignition switch is in the position "I" or "II". Four wipe functions are available: "Single Wipe", "Speed 1", "Speed 2" and "Intermittent Wipe" or "Automatic Wipe" (depending on the specification of the vehicle)". In "Speed 1" or "Speed 2" mode, the wipers are operating continuously at either normal speed or fast speed. When the intermittent wipe mode is switched on the windshield wipers operate at normal speed with the following wiper delays: ‡ Wiper delay 1: 1 second ‡ Wiper delay 2: 3.5 seconds ‡ Wiper delay 3: 6 seconds ‡ Wiper delay 4: 9.5 seconds ‡ Wiper delay 5: 15.5 seconds ‡ Wiper delay 6: 22 seconds In the event of a failure, the default time for the wiper delay is 3.5 seconds. When the windshield washer switch is operated washer fluid is sprayed onto the windshield. After a short delay designed to protect the wiper blades the wipers perform 2 or 3 wipes at low speed. If when the windshield washer switch is activated the windshield wipers are switched off, a single wipe is performed 4 seconds after the wipers have returned to the home position after performing the 2 or 3 wipes. If the wipers are set to intermittent wipe and the window washer switch is actuated, the wipes are only performed if no further wipe request has been selected via a shorter delay time within the 4-second delay time. The post wipe function on the windshield ensures that any water remaining on the windshield after washing is wiped away. It is only required if the wipers are switched off or they are set to intermittent mode. Rain sensor The automatic windshield wipers must be switched off before the vehicle is driven into a car wash. If the windshield is iced up, the wipers may only be activated by the rain sensor after the windshield has been completely defrosted. The rain sensor is an optical measuring instrument. Contamination such as oil, grease, dust or faulty wiper blades will prevent the system from working properly. Before switching on the automatic windshield wipers, the windshield must be clean in the area of the rain sensor. The rain sensor is built into a housing which is mounted behind the rear view mirror on the windshield.

419-10-7 Multifunction Electronic Modules 419-10-7 DESCRIPTION AND OPERATION 1 E139967 The rain sensor (1) consists of an opto-electronic measuring and evaluation circuit. The sensor can calculate the amount of precipitation falling on the windshield and request that the windshield wipers are switched on. On the basis of the information provided by the rain sensor, the windshield wipers are then set to the required wipe speed by the generic electronic module (BCM). Mode of operation of the rain sensor 1 2 4 3 E40970 Item Description 1 Raindrop 2 LED 3 Lens 4 Photodiode The rain sensor consists of three optical components: ‡ an LED ‡ D SKRWRGLRGH ‡ a lens The photodiode emits an infrared light beam of known intensity; the emitted light exits through the lens and is reflected by the windshield. The reflected light beam enters back through the lens and then reaches the photodiode. The corresponding value taken without moisture on the windshield is used as the reference value for the automatic calibration process. Subsequent deviations from this value cause the windshield wipers to be switched on. If rain lands on the windshield then the light reflected by the windshield has a lower intensity. This loss of intensity is registered by the photodiode and, proportionally to the loss of intensity, the module switches on the windshield wipers with the required wipe speed (in intermittent or continuous mode). When the automatic wipe function is switched on (wiper lever to intermittent position) the wipers are only activated automatically if the rain sensor registers water on the windshield. It is not necessary to calibrate the rain sensor, as this has already been done at the factory. The sensitivity of the rain sensor can be changed by adjusting the control resistor for the intermittent mode of the windshield wipers. ‡ Adjusting ring position - wide symbol: High sensitivity œ The wipers wipe even if only a small amount of water has been measured on the windshield. ‡ Adjusting ring position - narrow symbol: Low sensitivity œ The wipers only wipe if a large amount of water has been measured on the windshield. Central door locking Locking/unlocking œ central locking The central locking system locks all doors, so that none of these can be opened from the outside of the vehicle. The door lock motors are directly activated by the BCM.

419-10-8 Multifunction Electronic Modules 419-10-8 DESCRIPTION AND OPERATION The central locking is actuated if one of the following conditions is satisfied: ‡ A key is inserted into one of the door locks and turned to the "locking" position. ‡ The locking button on the remote control is pressed once. ‡ The lock/unlock button is pressed inside the vehicle. If one of the doors is not properly closed when the central locking function is performed then all doors are locked and unlocked again. The turn signal lamps will show one short flash when the vehicle has been successfully centrally locked. Locking/unlocking œ double locking The double locking system locks all doors so that they cannot be opened from outside the vehicle. In addition to the central locking function, the double locking system also disconnects the door opening levers from the locking mechanism. This means that the doors can no longer be opened from inside the vehicle. The double locking mechanism only works when the ignition key is not in the ignition lock. The double locking is activated if one of the following conditions is satisfied: ‡ A key is inserted into a door lock and turned to the "locking" position twice within 3 seconds. ‡ The locking button on the remote control is pressed twice within the space of 3 seconds (if the vehicle is configured for activation of the double locking upon a double press of the locking button on the remote control). If the ignition key has been turned to position "I" then the vehicle is centrally locked but not double-locked. If on a double-locked vehicle the corresponding ignition key is inserted into the ignition, the system switches over from double locking to central locking. The turn signal lamps will show two short flashes to confirm when the vehicle has been double locked. Locking/unlocking œ central unlocking The central unlocking system unlocks all of the doors on the vehicle including the liftgate. The central locking is actuated if one of the following conditions is satisfied: ‡ The door lock is turned to the unlocking position. ‡ The release button on the radio remote control is pressed once (provided that the vehicle is not configured to unlock the driver's door only). ‡ The release button on the radio remote control is pressed twice within 3 seconds. ‡ The door opening lever on a front door is pulled to the unlocking position on a centrally locked vehicle (provided the vehicle is not double locked). ‡ The lock/unlock button is pressed inside the vehicle, whilst a key is in the ignition or up to 10 seconds after a key has been removed from the ignition. If the vehicle has been configured for unlocking via the driver's door lock and the "unlocking" button on the remote control is only pressed once, then just the driver's door is unlocked. If the "unlocking" button on the remote control is then pressed again within 3 seconds the remaining doors are unlocked via the central unlocking function. If the vehicle was double locked beforehand, then the other doors are centrally locked, whereas the driver's door is unlocked. Unlocking of the vehicle with the ignition switched off, is confirmed by one long flash of the turn signal lamps. Locking/unlocking - automatic re-locking function The automatic re-locking function returns the locking system of the vehicle to its last status if it was centrally locked or double locked and the following conditions are satisfied: ‡ The vehicle is unlocked via remote control. ‡ A door has not been opened within 45 seconds. ‡ The ignition is not switched on. This feature may be turned off at the Ford dealer.

419-10- Multifunction Electronic Modules 419-10- DESCRIPTION AND OPERATION Smart Charge system In addition to the familiar functions, the Smart Charge system also performs the following functions: ‡ Automatic deactivation of non-critical high power electrical consumers when the battery voltage is low in order to reduce the level of current drawn. ‡ Automatic activation of non-critical high power electrical consumers when the battery voltage is excessively high in order to protect components which are sensitive to increased voltages. When the Smart Charge system is active, a slight variation in blower fan speed may be noticed. The battery charging current is optimized through continuous calculation of the battery temperature and monitoring of the alternator output voltage. By receiving the forwarded alternator load signal, the PCM is given early warning whenever an electric consumer is switched on or off. This means that the PCM receives information about imminent changes in the torque drawn by the alternator. By evaluating this information the PCM can provide a higher level of idling stability. The two remaining functions of the Smart Charge System are controlled by the BCM. Electrical consumers are switched off due to low voltage when the BCM determines (on the basis of the message received from the PCM on the CAN bus via the instrument cluster) that the battery voltage has dropped below the threshold. When the threshold for low battery voltage is reached the BCM automatically deactivates the following consumers - in this order and with a gap of 5 seconds between each: ‡ Electric booster heater (vehicles with diesel engines) ‡ Heated exterior mirrors and heated windscreen ‡ Heated rear window If the battery voltage rises back above the lower threshold then the BCM re-enables all of the electrical consumers which were previously disabled. They then have switched off status and must be switched back on by the driver. Electrical consumers are switched on due to excessively high voltage if the BCM determines that the battery voltage is above the threshold for overvoltage and the charge control lamp has been switched on. When the threshold is reached the BCM automatically activates the following consumers - in this order and with a gap of 5 seconds between each: ‡ Heated rear window ‡ Heated exterior mirrors and heated windscreen ‡ Electric booster heater (vehicles with diesel engines) If the battery voltage drops back below the threshold then the BCM automatically deactivates any consumers that were switched on. However, if they were switched on by the driver before the automatic activation, they will then be switched on again in turn with a 5-second time interval. Ignition overload protection The ignition overload protection intermittently disconnects certain circuits in order to restrict the current being drawn from the battery while the starter motor is operating. The position of the ignition switch is transmitted by the BCM on the MS CAN/HS CAN bus. The ignition overload protection relay is located in the battery junction box, and is activated by the BCM when the ignition switch is in position III. The activated ignition overload protection then switches off the following electrical consumers: ‡ Exterior lighting ‡ Windscreen/rear window wash/wipe systems ‡ Backup lamps Electric window regulators The ignition key must be in position "II" before the electric window regulators can be operated. The electric window regulator open or close the door windows when the switch is moved to the corresponding position. The movement of the window glass stops when the window regulator button is released or when the ignition key is moved from position "II" to position "I", "III" or "0". The driver door window can only be operated via the driver door switch; the other windows can be opened and closed via the driver door switch panel or the relevant door switch. If the window on the front passenger's door is operated via the switch on the switch panel in the driver's door, then the driver's door module

419-10-10 Multifunction Electronic Modules 419-10-10 DESCRIPTION AND OPERATION receives the cable-transmitted signal from the switch and forwards it on the CAN bus to the door module of the front passenger's door, which then moves the window glass to the corresponding position. The rear doors are each connected via a LIN bus to the door modules of the front doors. The disabling switch in the switch panel on the driver's door can be used to disable the window regulator switches in the rear doors. Speed control The BCM acts as the provider of the signals of the speed control system. The signals which come from the switch unit in the steering wheel are converted to CAN and sent on to the PCM via the HS CAN bus. The PCM then adjusts the power output of the engine to maintain the selected vehicle speed. Brake fluid level If the brake fluid level is normal the brake fluid level switch is closed and sends a ground signal via cable to the BCM. If the brake fluid level is below the threshold and the level switch opens for more than two seconds then the BCM generates a CAN signal which it sends to the instrument cluster. Power management The power management system offers various modes which can be used in different situations to ensure an effective power supply to individual modules. The power management function is integrated in the BCM. Four different vehicle modes are used depending on the operating status of the vehicle: Factory mode: ‡ Factory mode is activated while the vehicle is in production. In this mode, power supply is reduced to a minimum by switching off relays. Once the vehicle leaves the factory the factory mode is deactivated, and transport mode is activated instead. Transport mode: ‡ Transport mode is activated while the vehicle is en route from the factory to the dealer. In this mode, the vehicle can be driven without any adverse effects on vehicle safety. ‡ Individual modules and electrical systems (e.g. anti-theft alarm system, clock and remote control) are deactivated. ‡ This ensures that the battery is sufficiently charged when the vehicle is handed over to the customer. If the engine is started while the vehicle is in transport mode then the transport mode is temporarily suspended. It is reactivated once the ignition is switched off. Transport mode must be deactivated by the dealer. To do this, the dealer needs to press the brake five times and operate the hazard warning lights switch twice within the space of 10 seconds. When the transport mode is deactivated the BCM automatically changes into normal mode. Normal mode: ‡ The full functionality of all electrical systems is available in normal mode. Crash mode: ‡ Crash mode is activated as soon as the restraints control module (RCM) registers a sufficiently severe vehicle impact. ‡ The vehicle is then centrally unlocked if it was locked at the time of the crash. ‡ In addition the hazard warning lights are activated. ‡ Crash mode is deactivated if the ignition key is turned to position "0" and then back to position "II" after at least 500 ms. The hazard warning switch needs to be operated to deactivate the hazard warning lights. Immobiliser The PATS function is integrated in the BCM. Correspondingly, the send/receive unit is directly connected to the BCM (previously it was connected to the powertrain control module (PCM)). After reading in the key code (in ignition lock position "0", "I" or "II"), a corresponding message is placed by the BCM on the HS CAN databus for the PCM.

419-10-11 Multifunction Electronic Modules 419-10-11 DESCRIPTION AND OPERATION Depending on the outcome of this query and the status of the key, the PCM then issues the start enable. Central module configuration The modules in the vehicle were previously configured with the aid of the diagnostic unit and the "Module Programming" (inhale/exhale) function. Here, the actual status of each module is read into the diagnostic unit and then saved in the new module. Ranger vehicles utilize a new form of module configuration called "central module configuration". Here, all of the necessary configuration parameters are stored in the BCM at the factory, and from there they are transmitted via the CAN bus network to the individual modules. The diagnostic unit is equipped with a new routine for performing the central module configuration which is used to replace or subsequently change configuration data. Instead of reading the data into the diagnostic unit as was done in the past, they are transmitted by the BCM to the relevant module. The diagnostic unit is only used to initiate and monitor the process. For safety reasons all configuration data which are stored in the BCM are also stored in parallel in the instrument cluster. If the BCM then needs to be replaced, this means that the required configuration data can be read out from the instrument cluster with the aid of the diagnostic unit and then transferred to the new BCM. The BCM checks the configuration data for consistency and stores DTCs in the event of any faults (diagnostic unit trouble codes). In the event of a fault the functionality of a particular module may be restricted. When the BCM is replaced it is necessary to re-learn the keys for the remote control and for the PATS system. The procedure for doing this is the same as on the current vehicles. VIN identification During the VIN identification, the VIN is saved in individual modules at the factory. As soon as a module is identified when the ignition is switched on (even after the battery has been disconnected), it can be operated without further inputs. If no VIN or an invalid VIN is read in from a module then this is stored in a memory. Subsequently the functionality of the module may be restricted depending on its use. Climate control Evaporator temperature On vehicles with air conditioning the evaporator temperature is measured via the evaporator temperature sensor, located in climate the climate controls. The temperature is then communicated to the BCM. If a temperature below +2.9 °C is determined then the BCM sends a signal to the PCM via the HS CAN bus which then shuts off the air conditioning clutch. If the temperature is above +3.9 °C the BCM sends a signal to the PCM and the air conditioning clutch is switched back on again. Electric booster heater If the interior temperature is set to "HI" on the heater / air conditioning control assembly or the temperature control switch is set to its highest setting then the climate control module sends an "electric booster heater ON" request signal via the MS CAN bus to the BCM. If a manual air conditioning system is installed, the signal is transmitted via a conventional cable connection. The BCM controls the electric booster heater according to the available alternator capacity. In contrast to other Ford vehicles, there is no link to the coolant temperature or the ambient temperature. The electric booster heater electronics activates depending on a LIN signal generated by the BCM. The output stages switch the three heating elements of the electric booster heater ON or OFF individually, whereby the heating periods of the individual elements can overlap. Due to the variable switch-on duration, continuously variable temperature control is possible. The overall heating power of the three heating elements is linearly proportional to the LIN signal. If the LIN signal equals 10%, the electric booster heater is not activated.

419-10-12 Multifunction Electronic Modules 419-10-12 REMOVAL AND INSTALLATION Body Control Module (BCM) Removal NOTE: Removal steps in this procedure may contain installation details. 1. Refer to: Steering Column (211-04 Steering Column, Removal and Installation). 2. E140119 3. x4 E140120 Installation 1. To install, reverse the removal procedure.