Modic Iii - Overview - All Models BMW X5 E53

Introduction

The MoDiC III is necessary to meet the diagnostic needs of BMW vehicles. It compliments the DISplus as a diagnostic tool that enables the technician to quickly troubleshoot electronic faults and problems with the vehicles.

The advantage of the MoDiC is its mobility. You have the ability to take the tester anywhere in the workshop and to the vehicle. Additionally, the diagnostic head of the MoDiC will have the capabilities of being used as a flight recorder in the future. It can remain connected to the vehicle while it is driven to check for intermittent problems or conditions that only occur while the vehicle is driven.

The objectives used in the development of the MoDiC included

1. Maximum functional efficiency and mobility in the workshop
2. Diagnostic procedures similar to the DISplus
3. Operation similar to the DISplus
4. Basic measurement techniques available
5. Integrated TIS function
6. Designed for future requirements
7. Common Software CD for both the MoDiC and DISplus

Scheme 739

The MoDiC is a complete Diagnostic and Information System based on the current DIS tester. The complete MoDiC consists of the following components

1. MoDiC tester
2. Charging/Docking Station
3. Diagnostic Head
4. Diagnostic Cables (measurement cables)
5. Diagnostic Interface (serial cable)
6. Main/buffer batteries

Scheme 740

The MoDiC can be used for diagnosis purposes in several different configurations as follows

Portable

1. At the vehicle with either the radio frequency (RF) or cable interface
2. At the workbench with either the RF or cable interface

Docked on the charger with the RF interface or cable interface

MoDiC Features

The MoDiC tester has the following features

Scheme 741

Scheme 742

MoDiC Control Panel

The control panel below the touch screen contains the On/Off switch, the suspend mode switch and various function LEDs.

Scheme 743

The following chart shows the LED indications for the various operating situations

OPERATION SITUATION

CHARGER/DOCKING STATION

The charger/docking station has several functions for MoDiC operation

1. MoDiC software loading
2. Charging the MoDiC batteries
3. Printer connection link for the MoDiC while docked in the charging station.

The charger/docking contains the following features

Scheme 744

The floppy and CD ROM drives are used to update the MoDiC software and to down load programs. The MoDiC can only gain access to the drives when it is docked on the station.

Battery Charging

The two battery compartments on the docking station are for charging spare batteries.

The status LED on the side of the docking station indicate the state of charge of the batteries being charged.

The batteries in the MoDiC will also be charged while it is docked on the station.

Scheme 745

The status LED indicators provide the following information

Scheme 746

Printer Interface

The Docking Station printer interface connections are located on the underside of the unit.

These parallel printer connectors are for connecting the MoDiC docking station to the DIS printer.

A locally purchased Male/Male 25 pin parallel printer cable will be required. Connect as shown.

Scheme 747

Scheme 748

The diagnostic head is the link between the vehicle's electronic systems and the MoDiC tester.

The head is a self-contained computer that receives its power from the diagnostic socket when the head is plugged in.

The diagnostic head has 3 MB of data storage and a PCMCIA card for storing and transmitting data to the MoDiC.

The size of the diagnostic head has been kept small so that it can fit under the hood when it is closed. Future plans call for the head to be used as a flight recorder that can be attached to the vehicle and record data on a suspect system while the vehicle is being driven

Data from the diagnostic head can be transmitted to the MoDiC either by Radio Frequency (RF) or by a hard wire cable link. The RF transmitting range is approximately 950 feet and the hardwire cable is 25 feet long.

The diagnostic head has four connectors

1. Bottom edge: Two single connectors (red/black) used for signal recording for future usage and one multi-pin connector for the 20 pin diagnostic socket or OBD II DLC.
2. Top edge: COM connector for 25' wire link between Head and MoDiC.

Scheme 749

Scheme 750

The diagnostic head contains a status LED and a data recorder button (future use) on the side.

If the flight recorder button is pressed, the head goes into the record mode and communication between the head and the MoDiC is interrupted (make sure button is in the off position).

Connect the head with the 20 pin connector to the vehicle with the ignition key off. Switch ignition on and watch the Head Status LED. The status LED provides the following information in regards to the diagnostic head operation

Scheme 751

FLIGHT RECORDER

Temperature Monitoring

If the temperature threshold of the diagnostic head is reached, a warning display will appear on the MoDiC screen. The diagnostic procedure should be terminated and the head allowed to cool down.

If the temperature threshold is exceeded, the diagnostic head will switch itself off and the connection to the MoDiC will be terminated. Once the head has cooled down, the diagnostic link can be reestablished.

Diagnostic Cable

20 pin cable for connection of the diagnostic head to the 20 pin diagnostic socket

Scheme 752

Serial Interface Cable

25 feet cable for a hard wire connection between the diagnostic head and the MoDiC.

Scheme 753

DC Power Supply

External power supply cable for the MoDiC/Docking Station.

Allows vehicle 12 volt power supply to power the MoDiC or docking station.

Scheme 754

Multi-Function Cable (MFK)

MFK 1 and MFK 2 measurement cables used with the MoDiC's measurement system. Both cables are 2 meters long.

Measuring parameters for the cables are similar to the DIS tester's MFK 1 and MFK 2 MFK 1

Scheme 755

MFK1

MFK1

MFK2

MFK2

50 AMP Current Clamp

50 AMP CURRENT CLAMP

Additional Cable ends supplied with the MoDiC include

1. Two measuring probes.
2. Two adapter cables with 2mm probe ends.
3. Two adapter cables with 2.5mm probe ends.
4. Two adapter cables with 4mm probe ends.
5. Two spring clamp adapter ends.

Scheme 756

MoDiC Operation

The MoDiC is switched on by pressing the ON/OFF button on the control panel. Before the start mask appears, the following procedures are carried out

1. System boot
2. Temperature check
3. Buffer battery check
4. Main battery check
5. Power on internal self test
6. Start screen is displayed

Scheme 757

Suspend Mode

The MoDiC will switch to the suspend mode after a period of time when no activity has taken place.

The suspend mode is a power saving mode that is designed to save battery power. The MoDiC switches to the suspend mode in three steps as follows

Stage 1 (doze mode): The computer's clock pulse frequency is reduced to save power

Stage 2 (sleep mode): The hard disc is switched to the economy mode to save power.

Stage 3 (suspend mode): All internal components are switched off, but the content of the working memory is saved.

Any of the power-economy stages will be terminated if the touch screen is pressed. The suspend mode can be manually activated or deactivated by pressing the suspend mode button in the control panel.

Detailed Operation Instructions

Refer to the Handbook included with the MoDiC for in-depth setup, initial boot-up and cleaning/maintenance procedures.

E46 Diagnostic Concept

E46 diagnosis is set apart from traditional diagnosis procedures by the fact that it proceeds directly from the faults and their symptoms. Not only does this minimize time and effort but the quality of repair services can be significantly enhanced. Troubleshooting has become an integrated procedure covering all systems at once.

The diagnosis program suggests a test schedule and determines the sequence of tests. These features allow faults to be located more easily and with greater precision.

E46 Diagnostic Procedural Steps

1. Start of diagnosis
2. Vehicle identification
3. Short test (mandatory)
4. Fault symptom selection
5. DIS Test Schedule (inspection plan)
6. Processing of test modules (test information)
7. Examining results of diagnosis

Scheme 758

The E46 Diagnostic Concept is also used for E36/7,E38, E39, E53, E52 vehicles.

Start Of Diagnosis

Call up the diagnosis program and select the appropriate vehicle. The tester mode is now installed according to information stored in the equipment network so that the vehicle can be identified (E36, E38, E39, E46, E53, E52).

Scheme 759

Vehicle Identification

Vehicle ID is carried out on the basis of control module data (EWS and IKE/Cluster ZCS)

For automatic ID, the DIS or MoDiC reads the ZCS code to determine what systems are installed in the vehicle and directly seeks them out. This process is much faster than previous method of polling all systems possible for a specific vehicle series.

If the D bus is faulted or the tester can not communicate for whatever reason, Manual ID is required.

Scheme 760

When either manual or automatic vehicle identification has been completed, the Vehicle System" screen appears.

First carry out the short test to interrogate the fault memories of all control systems.

The system contacts the control modules directly to check if the control module is installed and capable of communication.

The status of the control module is then displayed in the Vehicle ID screen.

Another option is to check control modules for individual interrogation by pressing the systems individually from the screen.

Correct vehicle identification is the first essential step for both system guided and user guided troubleshooting.

Note. THE SHORT TEST MUST BE CARRIED OUT BEFORE DIAGNOSIS CAN TAKE PLACE.

Scheme 761

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Fault Symptom Selection

Once the short test has been completed, use the continue arrow (bottom right) to call up the fault symptom selection screen.

The Fault symptom selection screen displays all fault memories set for troubleshooting purposes.

Service technicians can enter fault symptoms observed by themselves or by the vehicle owner. This is done by selecting the appropriate items in a predefined list of symptoms.

Several fault symptoms can be selected simultaneously.

Use the transfer key to transfer selected fault symptoms into the display

The test schedule is generated on the basis of both the symptoms observed by customers or service tech's and the contents of the fault memories.

Scheme 763

Test Schedule

The test schedule is generated specifically for the problem at hand based on all current fault symptoms including those stored in fault memories of other control modules.

Diagnosis tests are prioritized in an order established by the MoDiC/DIS.

The test schedule screen displays one or several symptoms, diagnosis tests and corresponding test modules.

Scheme 764

The number and sequence of test schedule items is calculated on the basis of

1. seriousness of the symptom
2. number of times the symptom has been observed

Test results are continually analyzed, and the inspection plan is revised accordingly.

Test results can be assigned one of the following status items (listed in on line help).

1. = test not performed
2. ! = test performed, result OK If the result of a test module is OK, the test modules subordinate to that module are not included in the test schedule.
3. X = not OK If the result of a test module is not OK, the test modules subordinate to that module are included in the test schedule.
4. ? = result not known test interrupted?
5. = > = test is being carried (currently active)

The results of tests already completed influence the order of preference set up for remaining test modules.

Use the continue arrow to proceed to the next test.

DIS/MoDiC highlights the test which should be carried out next (dark background).

The results of tests already completed are indicated to the left of the test designations.

Note. The test schedule is revised each time the "test schedule" screen is re-entered following the completion of a module. If a fault has been rectified or its symptoms have changed, this is indicated in the "Inspection plan" display (sequence of test modules). Fault memory contents are assessed according to various criteria (e.g. frequency, temperature).

Test Information

Press the continue arrow to advance to the next test schedule. The Test Information screen appears automatically.

The test information screen automatically displays documents including

1. Wiring Schematics
2. Functional descriptions
3. Connector locations, etc.

The Test Dialog box displays test points and nominal values automatically. This screen format is used throughout the diagnostic software for all systems.

Scheme 765

Measurement System

The Measurement system is an integral part of the test procedure. It displays automatically when needed by the test schedule.

In E46 diagnosis, measurements are no longer phrased as

.... "connector X 10 pin 1 to connector X 20 pin 2."

Measurement instructions are now provided in the bottom right dialogue box as follows

Voltage Measurement

MFK 1 (+) ON (circuit name)

MFK 1 (-) ON ground

All measurements now relate to circuit name acronyms that are "hot spot" activated (if needed). Nominal values are displayed with the actual measured display. Simply answer the question the system provides in response to the measured value.

Scheme 766

If you are using a DVOM for measuring the values in place of the DIS/MoDiC MFK leads, you can enter the measured values into the system and follow the test plan as follows

1. Press the measurement system value display bar to bring up a "key pad".
2. Enter the measured value into the key pad and press the enter button. The DIS /MoDiC uses the entered values to continue with the test plan.

Scheme 767

Before diagnosis is terminated, a dialogue box reminds you to print the diagnosis report.

The dialogue box offers the following options

1. "Terminate" ends diagnosis without printing the diagnosis report.
2. "Diagnosis Report" prints the report before terminating.

If you forget to print the report before terminating diagnosis, it will be stored and can be printed by selecting "Stored Diagnosis Report" from the Print menu.

"Expert Mode" Troubleshooting

Expert Mode troubleshooting can be activated at any time during system guided troubleshooting.

Press the operating button in the navigation line. You have access to the following screens.

1. Documents
2. Function and component selection
3. Test Schedule (own test schedule)
4. Control Unit functions
5. Measurement system

To return to system - guided diagnosis, press the appropriate button. Any documents assigned to the diagnosis test which is currently active may be viewed. A new diagnosis test can be selected at any time in "function and component selection".

Press the Test Schedule button to call up the test modules assigned to the diagnosis tests. A second schedule list, "Own test schedule" now displays the test modules assigned to selected diagnosis tests.

Scheme 768

Control Unit Functions

Troubleshooting information is also available in the form of Control Module ID, status lists, component activation, read and clear fault memory by pressing the Control Unit functions button.

Only control modules identified during the short test can perform control unit functions

Scheme 769

Service Functions

Service Functions are special procedures used to make adjustments or complete repairs. Service functions are found in the Function Selection page of the Diagnosis Program. An example of some service functions include

1. Idle Speed Adjustment
2. EWS-DME Calibration
3. Automatic Transmission Fluid Level Check
4. Clearing control Unit Adaptation Values
5. Resetting the Service Interval Indicator
6. Reading the Service Interval Coding Data

Scheme 770