Mahindra SCORPIO Vlx User manual

©2009Mahindra&MahindraLtd.Allrightsreserved.Thisbookmaynotbereproducedorcopied,inwholeorinpart,without
thewrittenpermissionofMahindra&MahindraLtd.

MBFMDIAGNOSTICMANUAL
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www.teknetmahindra.com
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RELEASED BY -
TECHNICAL PUBLICATION CELL
MAHINDRA & MAHINDRA LTD.
Rev1 – OCTOBER 2009
All information contained in this manual is most up-to-date at the time of publication. However,
specifications and procedures are subject to change without notice. This manual is strictly
meant for restricted internal circulation within M&M Authorized dealer service centers.
MAN-00068
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Vlx
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

©2009Mahindra&MahindraLtd.Allrightsreserved.Thisbookmaynotbereproducedorcopied,inwholeorinpart,without
thewrittenpermissionofMahindra&MahindraLtd.

ABOUT THE MBFM DIAGNOSTIC MANUAL
The MBFM(Mahindra Body Function Module) diagnostic manual outlines the detailed procedures to
troubleshoot complaints related to the MBFM unit fitted on Mahindra Scorpio Vlx vehicle. The MBFM
unit controls many functions in the vehicle like lighting, door management, Wiping/Washing, Alarms , Tyre
pressure monitoring etc. Many features can be customized to suit customer’s requirements and
convenience, through the SMART tester.
This manual covers –
•Details of the various functions and features controlled by the MBFM unit.
•MBFM diagnostic tester and its application
•Retrieving DTCs from MBFM, analyzing the complaint and taking corrective action.
These vehicles can be identified by the new Cluster unit design –
Effective VIN - 92H14197 – BSIII 2WD
92K21582 – BSIV 2WD
92J17519 – 4WD
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Diagnostic Manual (MBFM) MAN-00068-1
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
Contents
How to use this manual 2
Functions/ Features - Mahindra Body Function Module (MBFM) 3
Structure of the MBFM – I/O 12
Overview of the in-vehicle communication network 13
Recommended trouble-shooting process 14
Warranty/Other information 15
Customisable features & Configurations 16
Using the MBFM diagnostic tool 17
List of DTC codes 27
Replacing the MBFM unit 91
Remote Learning 91
Tyre Swap 94
TPMS Learning 94

Diagnostic Manual (MBFM) MAN-00068-2
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
How to Use this manual
If the DTC code is known, then go to the Index of DTC code, and click on the DTC. The codes are
hyperlinked and the respective page containing the trouble shooting procedure for that DTC will
be displayed.
The following is the structure of the MBFM Diagnostic Manual –
•Brief description about the sensor/Actuator and its functions
•Possible defect codes related to that sensor/actuator
•Normal/Abnormal operating conditions of the sensor/actuator, possible causes and
vehicle/engine reactions
•Related circuit diagram, connectors and wiring plans
•Trouble shooting process
The diagnostic manual should always be used along with the vehicle’s wiring manual - (MAN-
00067).

Diagnostic Manual (MBFM) MAN-00068-3
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
Functions/Features - Mahindra Body Function Module (MBFM)
Following Feature / Functions are a part of Body Function Module
1. Exterior Lighting
Turn signals/Hazard
Auto Hazard
Auto Light Control - Follow Me Home
Auto Light Control - Lead Me to Car
Auto Light Control – Tunnel Lighting
Fog lamps
2. Interior Lighting
Footstep lamp
Interior courtesy lamps
Key ring illumination
3. Heated Rear Windshield (Rear Demister)
4. Wipers
Front wipe/Wash
Rear Wipe Wash
5. Door Management
Mechanical Lock/Unlock
Remote Lock/Unlock
Panic alarm
Mute/Unmute
Auto Relock
Auto relock on speed
Auto unlock
6. Driver Information & Warnings
7. Theft deterrent system
8. Power Supply
9. Starter & Accessory relay controls
10. Tyre Pressure Monitoring system
11. Communication bus
12. Diagnostics

Diagnostic Manual (MBFM) MAN-00068-4
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
1. Exterior lighting
Turn Signal and Hazard Lights are controlled by the MBFM.
The respective direction indicator lights are turned ON whenever the combination switch
stalk is moved to indicate a left or right turn.
Pressing the hazard switch will activate all the direction indicators simultaneously. It
functions without the ignition switch being turned ON.
Failure of any one bulb of the direction indicator lights will be indicated as higher than
normal flashing rate of the direction indicator lamps.
Auto-Hazard – If the vehicle’s bonnet (hood) is opened provided the vehicle speed is zero
and the park lamps are ON, the hazard warning lamps will automatically come ON. The
auto hazard will be active for 10 minutes. The hazard lamp can be switched OFF by
pressing the hazard switch to ON and then OFF.
Follow-me-home – The headlamps will come ON for 30 secs , after removing the ignition
key and opening the driver door, in low ambient light conditions/night. This feature is to
help the driver reach home in night or light up a dark garage. The headlamps can be
extended or switched ON/OFF by pressing the Lock button, for the next 30 secs. for a
maximum of 2 mins. This feature, if not desirable, can be deactivated permanently using
the SMART diagnostic tool.
This feature will be activated only if the Auto Light switch is in ON position.
Lead Me to Car - The headlamps will come ON for 30 secs, when the unlock button is
pressed, in low ambient light conditions. This feature is to help the driver reach the vehicle
in dark parking lots or dark garages. The headlamps can be extended or switched ON/OFF
by pressing the unlock button within the first 30 secs, till the one of the door is opened.
This feature, if not desirable, can be deactivated permanently using the SMART diagnostic
tool.
This feature will be activated only if the Auto Light switch is in ON position.
Tunnel Lighting: The headlamps come ON , in low beam , as soon the ambient light falls
below a predetermined rate, like entering in to a tunnel. The headlamp will be
automatically switched OFF as soon the ambient light improves, like leaving a tunnel.
This feature will be activated only if the Auto Light switch is in ON position.
Fog Lamps: The front fog lamps are controlled by the MBFM. The prerequisites are that
the park lamp has to be ON.

Diagnostic Manual (MBFM) MAN-00068-5
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
. Interior Lighting
The interior lights which are controlled by the MBFM are:
•Foot Step lamp
•Courtesy lamp
•Key ring illumination
The interior lamps will come ON when any door is opened.
The battery saver function of the MBFM will switch off the interior lamps after 5 minutes,
even if the door is open.
The courtesy lights will be turned ON when the vehicle is unlocked using the remote unit
or when any one of the vehicle’s doors are opened. (Only possible when the roof lamp
switch is in Door mode).
The MBFM turns OFF the courtesy lamps by progressively dimming the lamps, when any
of the following occurs:
•20 seconds has elapsed since the last door (including tailgate) was closed.
•When the vehicle is centrally locked after the last door (including tailgate) was
closed .
•The last door (including tailgate) was closed and the ignition is in the Run or Start
position
•All doors (including tailgate) are closed, and the ignition is in the Off or Accessory
position, and a lock (by remote control or mechanical key) is activated
•Battery saver time of 5 min has been completed without any door activity or lock
activity.
Note: If the vehicle odometer < 250 Kms then the battery saver will switch off in 2
minutes.
3. Heated Rear Windshield (Rear Demister)
The heated rear windshield feature heats the rear windshield.
The MBFM controls the relay of the rear defogger. When the switch is pressed first time
then the timer is set for 12 minutes. The MBFM shuts off the demister in 12 min, if the
switch is inadvertently left ON.

Diagnostic Manual (MBFM) MAN-00068-6
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
4. Wipers
The Front wiping / washing will work if the ignition is in ON position.
If the Auto wipe control switch is ON, then the MBFM will control the front wiper speed
based on the intensity of the rain as sensed by the Rain Light Sensor. The speed as well as
the time between wipes is controlled by the MBFM by manipulating the wiper ON/OFF
relay and wiper High speed relay.
When the Auto wipe switch is ON and if the MBFM detects that the wiper switch/stalk has
been changed manually then the manual request overrides the Auto Mode.
Flick Wipe (Mist) – Pushing the wiper stalk up, operates the wipers. The stalk
returns back to the OFF position.
Low Speed Wiper (LO) – Pushing the stalk down operates the wipers in low speed.
MBFM controls wiper ON relay.
High Speed Wiper (HI) – Pushing the stalk further down below the LO position
operates the wiper in high speed. MBFM controls the both wiper ON/OFF and
wiper High speed relay.
Wash – When the wiper stalk is pulled towards the steering wheel, the front
washer is activated and sprays water on to the windscreen. The wipers will
automatically start wiping the windscreen and continue to wipe 3 times after the
water spray is stopped.
The wiper will again wipe after 5 secs to clear any dribble from the top of the
windscreen
Rear Wiper/Wash operations –
The rear wiper is not controlled by MBFM
Rear Wiper – Turning the rear wiper switch up, operates the rear wiper. This
function is not controlled by MBFM.
Rear Wipe/Wash – Turning the rear wiper switch down and holding in that
position will turn on the water spray. The wipers will automatically start wiping the
tailgate glass and continue to wipe 3 times after the water spray is stopped This
function is not controlled by MBFM.

Diagnostic Manual (MBFM) MAN-00068-7
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
5. Door Management
The MBFM controls the locking/unlocking of all doors.
Mechanical Lock /Unlock – All the 5 doors will be centrally locked by the MBFM unit when
either the driver door is locked by the mechanical key (from outside) or the driver door is
locked from by the inner door lock handle is pushed (from inside).
Remote Lock /Unlock – All the 5 doors will be centrally locked/unlocked by the MBFM
unit when the doors are locked/unlocked by the RF remote control unit. The lock/unlock
status is indicated by chirps from the vehicles security siren and blinking of direction
indicators.
1 chirp/1 blink – Lock
2 chirp/2 blink – Unlock
5 chirps/5 blink while locking indicates that one of the door(s) could be open or
not closed properly
3 chirps /3 blink while locking indicates that the bonnet could be open or not
closed properly
4 chirps/4 blinks while unlocking indicates that there was intrusion attempt in the
vehicle in the locked state
If ignition is ON and a valid lock/unlock command is received, MBFM will lock/unlock the
doors without any audible or visual feedback.
Panic alarm : Pressing the panic button after 3 seconds will trigger the panic alarm –
Blinking direction indicators and siren. Panic alarm will work in both Ignition ON as well as
Ignition OFF conditions.
Mute/Unmute function: Pressing panic button and then the unlock button, within 3 secs,
will mute the siren. Following the same sequence again will unmute the siren.
Auto Relock – If the vehicle is unlocked by remote and if no action like door
opening/ignition ON is sensed for 45 secs, the MBFM will relock & arm the vehicle.
Auto Lock on speed – The MBFM will lock all the doors, if the vehicle speed reaches 10
Kms/hr.
Auto Unlock – The MBFM will unlock all the doors as soon as the vehicle is stopped and
the Ignition is switched OFF.

Diagnostic Manual (MBFM) MAN-00068-8
Scorpio
October 2009/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The
methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and
accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the
trained personnel, at the Authorised Service Centre of Mahindra & Mahindra Ltd., will amount to unauthorized use and shall be liable for
penalty/prosecution© 2009 Mahindra & Mahindra Ltd.
6. Driver Information and Warnings
The MBFM gives the following information to the Instrument cluster through LIN
•Driver seatbelt warning
•Brake Fluid Level/Park brake warning
•Engine low oil pressure warning
•Door open warning
•ABS MIL warning
•4WD lamps (4 H or 4 L)
Provides Door open signal to Voice Messaging System (VMS)
Provides Bonnet open signal to Engine ECU
Provides drive mode information (2H, 4L, 4H) to ABS EHCU (in 4WD vehicles)
Audible warnings
a. Driver seat belt
b. Key left in ignition.
Driver Seat belt: If the driver’s seat belt is not bulked there’s a tell tale warning in the
instrument cluster.
Key left in ignition: If the driver has left the key in ignition barrel and opens the door, the
MBFM will give a warning beep for 5 secs.
7. Theft Deterrent Alarms
MBFM provides various alarms related to vehicle security/theft deterrent. The vehicle will
be in “Armed” mode as soon the vehicle is locked using the remote.
Vehicles security alarm is triggered by the MBFM, if any intrusion is detected in an armed
vehicle by the MBFM. Unauthorised intrusion is detected if any door switches get
operated or IGN is turned ON, when the vehicle is in “Armed” mode.
8. Power Supply
Battery voltage is monitored by the MBFM. The MBFM does not operate below 8 Volts
and above 16 volts and hence all features controlled by MBFM will cease to function
under these conditions.
The battery saver feature provides automatic shutoff of the courtesy lamps, foot step
lamps, and park lamp if inadvertently left ON.
The battery saver function will be activated once the Ignition key is turned off.