SM129 - DISCOVERY 3 (LR3) - System Help file |
Version 1.23/1.26/1.27 (Dependant on the ECU) |
SM129 - DISCOVERY 3 (LR3) - System Overview | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The electronics of the Discovery Series 3, also known as LR3 in the USA and code named L319 are comprised of around 25 separate ECU’s (nodes) which are all interconnected by high speed communication Busses. This allows them interact with each other at high levels of interdependency, sharing information vital to their operation. A fault in any one ECU or its removal often has knock on affects in the others, with them storing bus error or missing node fault codes.
Most of the ECU’s use either a High speed (500K) or Medium speed (125K) CAN bus, which are both wired to the Diagnostic socket, these are also interconnected by the Instrument pack which acts as a built in gateway between the two busses. However the ECU’s related to information or entertainment that might additionally have to exchange Video or Audio data use a special fibre optic bus called the MOST bus. This bus is not connected to the diagnostic socket but is connected to the Medium speed CAN bus through the main Audio Head Unit which again acts as a gateway.
High line or Low Line Audio The Discovery 3 has 2 options for Audio equipment most noted by the head unit in the centre of the dash board. The High Line Audio head unit has a 3 x 4 button matrix immediately to the left of it's LCD display panel and the Low Line audio head unit has a row of 6 buttons underneath it's LCD display panel.
High line or Low Line Instrument Pack
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SM129 - DISCOVERY 3 (LR3) - Known Fitments | ||||||||
Vehicle makes, models and variants known or believed to be using this vehicle system, required diagnostic lead and degree of known compatibility.
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SM129 - DISCOVERY 3 (LR3) - Physical Details |
SM129 - DISCOVERY 3 (LR3) - Diagnostic Capabilities (Read Fault Codes) |
The Reading Fault codes ability of this software module is also supported by the Stand Alone Diagnostic capabilities of the Faultmate MSV-2 Extreme. In some cases Abbreviations are used to save space on the LCD display of the EXTREME, in which case the abbreviation we use is shown in capitals within square brackets [LIKE THIS]
The functionality of each of this vehicles ECU's in respect of its strategy / methodology for detecting, recording and reporting faults follows the format of a new and very advanced industry standard known as ISO 14229. It is one of the very first vehicles to support this new standard and as such not all ECU's fully support all its features or get it exactly right. It therefore requires some understanding to use and interpret correctly, but is far more informative and helpful in helping properly fix any problem in a vehicle. The ISO 14229 standard defines Fault codes, which it calls DTC's (Diagnostic Trouble Codes) as 2 byte code values / meanings (up to 65536 possibilities). These translate to a 5 digit codes that are prefixed with a letter, P, B, U, C that groups each fault respectively into Powertrain, Body, Chassis and Network related. These 2 Byte code meanings are by definition quite basic with a third byte then being used to provide additional further detail in the form of a lookup of nearly 100 possible fault causes of 256 possible, EG open circuit, Short to Battery, Out of Range, too high, out of range too low, implausible value etc, This last byte value is sometimes described as being added to the previous five digit code, giving a resultant seven digit code. However our system translates the entire code to readable text, including the detail. In addition another byte is used to indicate the faults status, Ie Permanent [PERM], Pending [PEND], Intermittent [INT] or Historic [HIST].
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SM129 - DISCOVERY 3 (LR3) - Diagnostic Capabilities (Clear Fault Codes) |
This function Clears all faults from the ECU memory and resets all counters. If a bus error has occurred or an ECU has been removed, it may be required to clear the fault memory of all ECU's on the vehicle. This function is also supported by the stand alone diagnostic capabilities of the Faultmate MSV-2 Extreme |
SM129 - DISCOVERY 3 (LR3) - Diagnostic Capabilities (Settings) |
Standard Settings
The provided settings for nearly all of the Discovery 3 / LR3 / Range Rover Sport ECU's, comprise of about a dozen pieces of numerical information related to hardware and software versions, various manufacturers part numbers, the Vehicles VIN number and the Current Network status. Flash Programming Most of the ECU's on the Discovery 3 / LR3 / Range Rover Sport are flash programmable so they can be debugged and updated in the vehicle. To achieve this a separate database utility called Flash File Loader can be called up from within the settings menu. This application helps select the files to be programmed into the respective vehicle ECU and also transfers them onto the Vehicle server ready for programming. The application has its own built in help file. Car Configuration File (CCF) Settings The Instrument Pack contains a very special block of Data called a Car Configuration File (CCF). This centralized block of data actually defines and sets the current configuration settings for just about all of the on board systems in the entire vehicle. The Data block is broken down into hundreds of individually configurable settings which are then shared across the vehicles CAN network in real time so all of the vehicles on board systems can know their own configuration and that of all other ECU's on the vehicles network. By using this single source of configuration setting data, there is no requirement to have any configuration settings held in each ECU, making replacement far simpler. There are also 2 copies of this data kept as back ups in the Body control and engine management ECU's should they be required and the Manufacturers IDS system also has a back up copy of the original "as Built" CCF data for every single vehicle manufactured by Ford / Land Rover etc, supplied on each DVD ROM update. For convenience, the several hundred CCF settings have been broken down into smaller sections on the same page, and absolutely all of them can be changed at will. However due to the sheer volume of configuration settings, we strongly recommend that the first step for anyone is always to save the original settings and stick with the original values for anything you do not specifically want or need to change. Experimentation is of course possible but ultimately you are responsible for any changes you make and you must consider any possible negative effect on the vehicles operationally. So we would advise against things like changing the engine or transmission type unless you really have changed the engine or transmission. Obviously it is possible to beneficially alter the way the vehicle works and functions in many cases and it is easy to add software only features / enhancements such as 4x4 info, Nav on Move, (Destination Entry on Move), Voice command etc. And of course the vehicle can be re configured to suit any physical additions. However in a lot of cases making changes in the CCF Configuration settings file may not have any visible or determinable effect on the vehicles functionality, this can be for a number of reasons.
Service Interval Indicator Settings The Instrument Pack performs a function called the Service Interval Indicator (SII) which can be used to remind the vehicle owner / driver when the vehicle requires a service or inspection. To accomplish this, The instrument Pack holds a count of days elapsed, distance travelled and fuel used, when the vehicle had its "Last Service Reset", It then keeps a "since last service reset" count on all three of these values and should any of them exceed their allowed values, it will issue a service due reminder. This reminder can also be triggered to occur early. A service reset event consists of taking the three "since last service reset" values, which are then be zeroed at the same time as adding their values onto the stored "last Service Reset" values. For convenience we have separated the page into sections based on Time, Distance, Fuel usage and General. The Section for Distance is based on Km which is the unit the system uses but for convenience we have also provided and additional set of Miles values which is totally derived from it's identical Km counterpart values in the previous set. All manipulation of values must be done in the KM values, and so all miles values are read only. For reference, to convert Miles to Km the Miles figure needs to be divided by.6214 and for Km to Miles, the Km figure multiplied by .6214. Reset service interval can be done by manipulating the data in the settings page, or by selecting the function in Other. This function will use the default values and automatically calculate the days and mileage.<.br>
Settings For Service Interval Indicator Related to Distance in Km. Settings For Service Interval Indicator Related to Fuel Consumption in litres. General Settings For Service Interval Indicator.
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SM129 - DISCOVERY 3 (LR3) - Diagnostic Capabilities (Inputs) |
Real time live display of the information the electronic control unit of the selected vehicle system is currently deriving from its input sensors. RIDE LEVEL MODULE - (This is divided into 2 sections)
PETROL ENGINE MANAGEMENT - (This is divided into 4 sections)
DIESEL ENGINE MANAGEMENT - (This is divided into 3 sections)
PARK BRAKE MODULE
BODY CONTROL MODULE - (This is divided into 3 sections)
INSTRUMENT PACK HIGH LINE - (This is divided into 2 sections)
HEVAC
TRANSFER CASE CONTROL MODULE
INTERGRATED HEAD UNIT
AUDIO AMPLIFIER MODULE
ANTI-LOCK BRAKE SYSTEM - (This is divided into 2 sections)
ADAPTIVE FRONT LIGHTING SYSTEM
ALL TERRAIN CONTROL MODULE
ADAPTIVE CRUISE CONTROL
FUEL BURNING HEATER - (This is divided into 2 sections)
PARKING DISTANCE CONTROL - (This is divided into 3 sections)
RESTRAIN CONTROL MODULE - (This is divided into 3 sections)
REAR DIFFERENTIAL
REAR ENTERTAINMENT
STEERING ANGLE
TRANSMISSION CONTROL MODULE - (This is divided into 3 sections)
TRAFFIC MESSAGE CHANNEL
TIRE PRESSURE MONITOR - (This is divided into 3 sections)
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SM129 - DISCOVERY 3 (LR3) - Diagnostic Capabilities (Outputs) |
ELECTRONIC AIR SUSPENSION OUTPUTS CAUTION : These features will cause the vehicle to move, please ensure adequate clearance and that no body can be harmed by movement of the vehicle before using them.
BODY CONTROL OUTPUTS The following functions can be turned On or Off to test. LOCKS
LIGHT RELAYS
SEATS CAUTION: These features will cause movement, please ensure adequate safety and that nobody can be harmed by movement before using them.
INSTRUMENT PACK HIGH LINE OUTPUTS The following functions can be turned ON WARNING LAMPS
SPEEDOMETER - CAN BE SET TO SEND TO THE FOLLOWING:
GAUGES - CAN BE SET TO SEND TO THE FOLLOWING:
SOUNDERS - CAN BE SET TO ON TO TEST FUNCTIONS:
LCD TEST - CAN BE SET TO ON/OFF/START TO TEST FUNCTIONS:
HEVAC
OPTION BOX 1 - THE FOLLOWING FUNCTIONS CAN BE TESTED
AIR ACTUATOR TARGET VALUE - CAN BE SET TO SEND TO THE FOLLOWING:
BLOWER SPEED - CAN BE SET TO SEND TO THE FOLLOWING:
OPTION BOX 2 LEFT RIGHT BLEND ACTUATORS:
OPTION BOX 3 FACE FOOT FLOOR DEFROST ACTUATORS:
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SM129 - DISCOVERY 3 (LR3) - Diagnostic Capabilities (Other) |
ELECTRONIC AIR SUSPENSION CAUTION : These features will cause the vehicle to move, please ensure adequate clearance and that no body can be harmed by movement of the vehicle before using them.
CENTRAL JUNCTION BOX / BODY CONTROL
AUTOMATIC GEARBOX
TDV6 ENGINE MANAGEMENT
TRANSFER CASE
PARK BRAKE MODULE
ABS
STEERING ANGLE SENSOR
FUEL BURNING HEATER
ADAPTIVE FRONT LIGHT MODULE
REAR DIFFERENTIAL MODULE
ADAPTIVE CRUISE CONTROL
Before running the function: Make sure the vehicle is on level ground and that the forward looking sensor (front distance range sensor) levelling procedure has been carried out as detailed in the Workshop manual. This application should not be carried out until the forward looking sensor (front distance range sensor) is known to be correctly leveled. After running the function: Make sure that the 'follow symbol' on the instrument pack is now flashing. The 'follow symbol' should now be flashing, this indicates that the vehicle is in 'service alignment' and now requires a driving cycle. The service alignment process measures the path of stationary targets such as street lights, railings, traffic signs, parked vehicles etc, and uses this data to correct for radar misalignment. Alignment will complete more quickly when more suitable targets are seen. The following recommendations will help: - The speed must be above 30mph (50kph). - Choose a road with plenty of metallic items to the sides. - Following vehicles too closely will obscure the stationary targets from the radar, so leave a time gap of at least 2 seconds. - A straighter road will produce a quicker and better result, although the process will still operate on curved roads. The time the module takes to align will vary, depending on the route, speed, number of targets, and individual module. When the flashing 'follow symbol' lamp extinguishes, the system is correctly aligned. To be fully functional the following still needs to be carried out: - Stop the vehicle at the next available opportunity. - Turn the ignition off and wait 15 seconds. - Start the engine, once 15 seconds have elapsed. Once complete, clear the systems fault code memory. |