1. ENGINE IMMOBILISER
Copyright © MILE 2011 MILE / XUV500 / IMMOBILISER/ VER 01 / JUL 2011

2. System Configuration 3rd Generation Engine Immobiliser
Double Encrypted Challenge
RF signal transmission

3. What is an Immobilizer
The immobilizer is a System which prevents unauthorized Starting of automobile engine unless the correct key is present.

4. Types of Immobilizer in Mahindra vehicles
RKE Based - Starter motor cannot be cranked
STARTER IMMOBILIZER
- Scorpio Slx
RKE Based - Starter motor cannot be cranked and fuel injection is also Deactivated
STARTER & ENGINE IMMOBILIZER
- Scorpio Vlx
ONLY ENGINE IMMOBILIZER
- Logan
-Xylo
-Genio
TBI BASED - fuel injection Deactivated & starter motor also cannot be cranked in some vehicles
ENGINE & STARTER IMMOBILIZER
-Scorpio Refresh
Scorpio Ex
XUV500

5. What is RKE Based Starter Immobilizer
When a vehicle is locked with Remote and unlocked Manually the CDL unit will Trigger the Siren and deactivate Starter = +

6. Starter cut off RF signal CDL ECU Terminal No. 17
Relay Starter immobilizer
Relay Starter
From 100A maxi fuse To
Starter
Motor
Terminal
No.50

7. RKE Based Starter & Engine Immobilizer
Functionality :
CDL authenticates the right RF Key & Communicates the Lock/Unlock
Status to the Engine ECU.
Engine ECU will Mobilize / Immobilize the vehicle depends on the
communication from CDL unit.
Block the vehicle for theft attempt.
When a vehicle is locked with Remote and unlocked Manually the CDL unit will Trigger the Siren ,deactivate Starter & Fuel Injection. = + +

8. Starter cut off with engine immobilizer – Generation1
Integration : Enabled the Immobilizer feature in both CDL & Engine ECU.
Existing CDL Modified
Immobilizer Software developed in Engine ECU
Engine Management
System ECU
RF Signal
Security System ECU
Software Immobilization
Communication Signal
Battery
Starter Motor
Relay

9. TBI Based Engine Immobilizer
TBI – Transponder Based Immobilizer system.
System deactivates the Fuel Injection if the Key is not authenticated.
Keys are authenticated by verifying the RF rolling Codes sent by key.
To make the system more effective , challenge – response authentication are incorporated in encrypted form.
challenge-response authentication - one party presents a question ("challenge") and another party must provide a valid answer ("response") to be authenticated.
Encryption – It is the process of transforming readable information in to unreadable one.

10. How it works
If the ID code transmitted from the key (transponder) does not match the pre-registered code in the Immobilizer Control Unit (ICU), injection are not performed by the engine ECU.
ICU
key
ECU or

11. Immobilizer System Work Flow - Scorpio,Xylo,GenioRF
Immobilizer ECU
Transponder Key
ICU identifies the Validity of the Key. ( Valid / Invalid )
EMS Identifies the validity of the ICU.
CAN
Based On Key Validity information EMS Allows/Blocks The Fuel Injection.
Upon the Valid ICU , EMS Accepts the Key validity Information
EMS ECU
Finally fuel injection is authorized

12. Immobilizer System – XUV500
MBFM RF
Transponder Ring
Transponder Key
MBFM identifies the Validity of the Key. ( Valid / Invalid )
EMS Identifies the validity of the MBFM
CAN
Based On Key Validity information EMS Allows/Blocks The Fuel Injection.
Upon the Valid MBFM , EMS Accepts
the Key validity Information
EMS ECU
Finally fuel injection is authorized

13. What is a Transponder
A transponder is incorporated in the head section of the key.
XUV500
Battery less chip.
Moulded into the key fob.
Xylo
Communicates with ICU through RF.
Each Transponder is configured with Mahindra specific codes during the manufacturing.
Only the Mahindra Specific Transponder can be used with Immobilizer.

14. How it works
It receives energy from the antenna and respond by transmitting RF signal to the antenna.
Transmitter + Responder = Transponder
ASIC
CONDENSER
COIL
The transponder accumulates energy in the condenser. Once the energy supply from the coil has stopped,
using the stored energy in the condenser, the transponder transmits the ID CODE (stored within the ASIC).

15. How it works What is an Antenna(Transponder Ring) Xylo, Scorpio, Genio
XUV500
It is located directly in front of the steering handle lock.
How it works
supplies energy to the transponder
receives signal from the transponder
sends transponder signal to the ICM

16. What is an ICU How it works ICU is IMMOBILIZER CONTROL UNIT.
XUV500-It is inside the MBFM . It is fitted below the steering wheel
Xylo, Scorpio,
Genio fitted on
the ignition lock
barrel
XUV500 MBFM
XUV500
How it works
Supplies power to the antenna.
Receives and analyses signal from the key via antenna.
conveys the key status information to engine ECU over CAN.

17. How it works in immobilizer
What is an ECU
ENGINE MANAGEMENT SYSTEM CONTROL UNIT.
How it works in immobilizer
In the Ignition ON position, the ECU sends a challenge to ICU
Receives and analyses Response signal for the challenge from the ICU.
Receives and analyses key Status From ICU.
Activates the Fuel Injection if the Signal from ICU & key status is authentic.

18. Starter Relay Control – XUV500
IO Circuit
MBFM
Ignition
Crank
Start Stop (CAN)
Immo & EMS Authentication
RKE
Engine speed (CAN)
Gear Neutral (CAN)
Clutch (CAN)

19. Starter Relay Control – XUV500
Starter Relay operation will allowed only when
Vehicle in Antitheft Disarm state AND
Immobilizer Authentication cleared in the current ignition cycle
Starter Relay will be engaged
If Start Stop Disabled or Start Stop inactive
KL15 Active AND
KL 50 Active AND
Engine Speed Below 50 RPM
If Start Stop Enabled or Start Stop active (key Crank)
If Start Stop Enabled or Start Stop active (System Crank)
Start Signal From EMS AND
Starter Relay will be disengaged once
Engine speed reach 550 RPM OR
Engaged time is more than 10 sec

20. System Failure
XUV500
Failure of system is reported in the form of System Lamp.
In XUV500, Tell tale will blink when the vehicle in locked condition/ignition off
Tell tale will go off once the ignition turned ON and immobilizer authentication is passed.
By Connecting respective vehicle EMS Smart tester & Detecting P183 series (DTC) confirms Immobilizer System problem in Xylo, Scorpio & Genio.
Open respective vehicle Immobilizer Diagnostic Tester & Manual for Further Diagnosis.
Failure of ECU & ICU Components Should be reported through
CrFR – Common Rail Failure Report
SCR – Service Complaint Report
Replacement of ECU, Keys & ICU/MBFM requires approval from Tekline.

21. Parts - relation
EMS ECU
Immobilizer ECU
Key
Since , All the components are paired to each other in End Of Line,
In the Field, If there is the need of following services,
New Key allocation.
Immobilizer ECU replacement.
EMS ECU replacement.
A Special re pairing/learning needs to be provided for genuine customer/dealer.
Immobilization because Immobilizer ECU is Not paired with Both EMS & Key
Immobilizations resulted because the new key is not paired
Immobilization because new EMS ECU is not paired
New EMS ECU
New Key
New Immobilizer ECU

22. Learning Process
For Key Learning, ICU Learning and ECU Learning
dealer
Mahindra
T. A. R
SMART
TESTER
Mahindra Server

23. Service process
For Key Learning, ICU Learning and ECU Learning

24. Service process Order for the blank ICU Receive ICU Assignment
Key Assignment
ICU Replacement
ECU Replacement
Order Mechanical Key through “Duplicate Key Request Form”
Receive Key
Key Assignment
Order for the blank ICU
Receive
ICU
Assignment
Order blank
ECU
Once Received, flash the ECU with the correct dataset and VIN
Assign the ECU

25. Key points 3rd Generation Immobilizer Electronic Key based System
Ensures the high degree of security.
Highly complex Encryption and communication strategy between the ECUs.
Highly Sophisticated after sales support. (Online code - server based)
Mahindra Immobilizer system is THATCHAM approved system – hence customers can have the Insurance Premium Benefit.

26. Tail gate/back door Unlock
Remote Key less Entry
Tail gate/back door Unlock
MBFM
Lock
Unlock

27. Remote Key Less Entry - Function
Lock
Locking of all the doors will happen on pressing lock button
If all doors are closed – Flasher will flash once
If any door is open – Both Flasher and Siren will chirp 5 times
Un-Lock
Un-Locking of all the doors will happen on pressing unlock button
If no Theft attempted during lock period – Flasher will flash twice
If theft attempted during lock period - Flasher and Siren will chirp 4 times
Tail gate release
Enable the Tail gate release button for 45sec on pressing tail gate release button
Flasher will flash 4 times.
Mute/Un-Mute
Pressing the Lock button continuously for more than 3sec will change the status of Mute/Un-Mute
Flasher will flash once to indicate the change in status
Panic/Search
Pressing Un-Lock button continuously for more than 3sec will enter to Panic/Search
Pressing un-lock button again will come out of panic/Search

28. Anti Theft- Function Alarm
Vehicle will enter into alarm when any door status/Ignition status changed when vehicle is locked through RKE
Alarm time – Pre-alarm for 10sec and continuous alarm for 35sec
After alarm period, there will not be any alarm again till any further change in door/Ignition status again
On Press tail gate release and on opening tail gate release within 45sec – Alarm will not triggered.
On opening other doors other than tail gate will trigger alarm
Locking the vehicle with Mechanical key will not trigger alarm on theft attempting
Unlocking the door with the mechanical key (if already locked with RKE), will trigger the alarm and it will stop if either RKE unlock is pressed OR on successful authentication of key with ignition ON

29. Thank You Copyright © MILE 2011
MILE / XUV500 / IMMOBILISER/ VER 01 / JUL 2011