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.

DIAGNOSTICMANUAL(IMMOBILIZER)

 

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www.teknetmahindra.com
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RELEASED BY -
TECHNICAL PUBLICATION CELL
MAHINDRA & MAHINDRA LTD.
Rev1 – MARCH 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-00056

Vlx/Sle/Lx



©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 IMMOBILIZER DIAGNOSTIC MANUAL
The immobilizer diagnostic manual outlines the detailed procedures to troubleshoot complaints related to
the engine immobilizer system fitted on Mahindra Scorpio Vlx/Sle/Lx (Refresh) vehicles. Since the
engine immobilizer system is related to vehicle security, only authorized persons (CoTEKs) can work on the
immobilizer system in conjunction with M&M TEKline.
This manual covers –
•Procedures to be followed while reassigning old keys or assigning new keys to a vehicle.
•Procedures to be followed while replacing Engine Management System (EMS) ECU or Immobilizer
ECU (ICU).
•Retrieving DTCs from ECU and/or ICU, analyzing the complaint and taking corrective action.
In spite of our best efforts to make the manual error-free, a few errors could have inadvertently crept in. If
you identify errors, functional or typographical , please inform your TEKline or [email protected].
Suggestions to improve the manual and make it more user-friendly are also welcome.

Diagnostic Manual(Immobilizer) MAN-00056-1
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Contents
oHow to use this manual
oOverview of in-vehicle communication network
oRecommended troubleshooting process
oWarranty/Other information
oKey Assignment guideline
oKey Assignment process.
oEMS ECU replacement
oImmobilizer ECU replacement
oEMS and Immobilizer ECU replacement - Both keys available
oList of Unavailable Services
oIndex of DTC codes
oWiring Diagram

Diagnostic Manual(Immobilizer) MAN-00056-2
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
How to Use this manual
.
The manual is divided in to 2 parts. The first part outlines the procedure to be followed
when any of the components, viz Keys, EMS ECU or Immobilizer ECU (ICU), needs to be
replaced. The second part outlines the trouble shooting process.
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 Diagnostic Manual (Trouble shooting process) –
•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 DTCs for Immobilser are generated at the ICU as well as at the Engine EMS ECU.
Hence it is essential that after looking at the DTC at ICU , the DTC at the EMS ECU
should also be checked. Based on the combination of DTCs, the possible causes and the
corrective actions to be taken.
It is also essential to clear the DTCs both at ICU and EMS ECU. The diagnostic manual
should always be used along with the vehicle’s wiring manual.

Diagnostic Manual(Immobilizer) MAN-00056-3
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Overview of the in-vehicle communication network
Engine
(EMS ECU)
Diagnostic
Connector
(DLC)
IMMOBILIZER
(ICU)
CAN
K‐Line

Diagnostic Manual(Immobilizer) MAN-00056-4
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Recommended Trouble Shooting Process
Customer complaint Record/Understand Customer Verbatim
•What happened?
•When it happened?
•What was the event before that?
•Does it happen all the time?
•Does it happen only in some condition?
Search for Published quick solution in TEKnet.
Follow DTC based diagnosis
Contact TEKliner with TAR
(Technical Assistance Request)

Diagnostic Manual(Immobilizer) MAN-00056-5
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Warranty & Other Information
All failures/complaints encountered on EMS ECU and/or ICU controllers need to be
reported through a Common Rail Failure Report (CrFR)/Service Complaint Report (SCR).
Replacement of any of the EMS ECU or ICU controller requires approval of the TEKline.
Ensure that a TAR is raised#in the TEKnet website for approval, attaching the CrFR/SCR.
While raising a warranty claim, the TAR no should be quoted on the warranty claim.
# Only a trained and certified CoTEK can raise a TAR (in TEKnet website)

Diagnostic Manual(Immobilizer) MAN-00056-6
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Key assignment guideline
Note - Only 2 keys/vehicle possible at any point of time
Notes –
1. Duplicate key should be ordered after customer verification by the dealer
2. Fill up the DKR format (Duplicate Key Request – Ver2 ) and mail it to
[email protected]
3. Once the new key is received, follow the key assignment process as below.

Diagnostic Manual(Immobilizer) MAN-00056-7
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Key Assignment Process
Important Note -
1. The vehicle can be started without completing the TOOL PROGRAMMING KEY –
2 and AFTER SALES CODE – 2 stages. However the vehicle cannot be attended
in future for any work on Engine ECU, IMMOBILIZER ECU (ICU) or the keys.

Diagnostic Manual(Immobilizer) MAN-00056-8
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
EMS ECU Replacement
Important Note -
1. The vehicle can be started without completing the TOOL PROGRAMMING KEY –
2 and AFTER SALES CODE – 2 stages. However the vehicle cannot be attended
in future for any work on Engine ECU, IMMOBILIZER ECU or the keys.
2. For EMS dataset flashing procedure, refer to EMS diagnostic manual.

Diagnostic Manual(Immobilizer) MAN-00056-9
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Immobilizer ECU (ICU) Replacement
Important Note -
The vehicle can be started without completing the TOOL PROGRAMMING KEY – 2 and
AFTER SALES CODE – 2 stages. However the vehicle cannot be attended in future for
any work on Engine ECU, IMMOBILIZER ECU or the keys.

Diagnostic Manual(Immobilizer) MAN-00056-10
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
EMS ECU and Immobilizer ECU (ICU) replacement –
Both keys available
Important Note -
1. The vehicle can be started without completing the TOOL PROGRAMMING KEY –
2 and AFTER SALES CODE – 2 stages. However the vehicle cannot be attended
in future for any work on Engine ECU, IMMOBILIZER ECU or the keys.
2. If any one of the keys is not available at the time of learning, only one key
(present key) can be assigned to the vehicle. The vehicle cannot be assigned
the second key anytime in the future.

Diagnostic Manual(Immobilizer) MAN-00056-11
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
List of Unavailable Services
The following actions are not possible –
1. Replacement of EMS ECU when both keys are not available
2. Replacement of Immobilizer ECU (ICU) when both keys are not available
3. Replacement of EMS ECU and Immobilizer ECU (ICU) when both keys are not
available
Contact TEKline for any advise/assistance

Diagnostic Manual(Immobilizer) MAN-00056-12
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Index of DTCs
Code Label Page
No
90A0 Key is rejected by the Immobilizer ECU 13
90A1 Invalid Transponder password is found 14
90A2 No response from EMS ECU 15
90A3 No EMS ACK after signature mismatch 17
90A4 Mismatch in checksum 1 20
90A5 Mismatch in checksum 2 21
90A6 Mismatch in checksum 3 23

Diagnostic Manual(Immobilizer) MAN-00056-13
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Immobilizer
Immobilizer code
DTC Diagnostic item
90A0 Key is rejected by Immobilser ECU
+
EMS code
DTC Diagnostic item
P-0513 Invalid Key error
Vehicle behaviour: Engine does not start, check lamp will blink/ON
Probable Cause:
Invalid key error.
Key is rejected by Immobiliser ECU
Corrective Action:
Replace the key.
Perform the transponder learning
Clear error at both EMS ECU and Immobiliser ECU
Inform the customer about the theft attempt.
+
EMS code
DTC Diagnostic item
P-1832 Immobilized condition.
Key is rejected by the Immobilizer ECU
Somebody duplicated the mechanical key and tried to start the vehicle.
Theft attempt is made
Corrective Action:
Clear the errors at EMS ECU and Immobilizer ECU (ICU) and alert the customer.
90A0

Diagnostic Manual(Immobilizer) MAN-00056-14
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Immobilizer code
DTC Diagnostic item
90A1 Invalid Transponder password is found.
+
EMS code
DTC Diagnostic item
P-0513 Invalid Key error
Vehicle Behavior:
Engine not starting.
Probable Cause:
Somebody duplicated the mechanical key and tried starting the vehicle.
Theft attempt is made
Corrective Action:
Clear the errors at EMS ECU and Immobilizer ECU (ICU).
Alert the customer.
If more than one error is found in EMS ECU please follow the priority of the errors during.
Here below the errors are listed in the priority error.
EMS Errors Priority
P0513 1
P183A 2
P0633 3
P183E 4
P183B 5
P1832 6
90A1

Diagnostic Manual(Immobilizer) MAN-00056-15
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Immobilizer code
DTC Diagnostic item
90A2 No response from EMS ECU after signature mismatch
If more than one error is found in EMS ECU please follow the priority of the errors during.
Here below the errors are listed in the priority error.
+ EMS code
DTC Diagnostic item
No error code recorded
Probable Cause:
Wrong dataset is flashed in the EMS ECU.
Corrective Action:
Flash the correct dataset.
+
DTC Diagnostic item
P-183D EMS is locked
Vehicle Behavior:
Vehicle not starting.
Check lamp in the cluster is ON/Blinking.
Probable Cause:
Invalid Immobilizer
CAN wiring related error.
ICU-EMS not learned.
Corrective Action:
Check the CAN wiring.
Learn the Immobilizer ECU( ICU) to EMS ECU.
Clear the errors at EMS ECU and Immobilizer ECU (ICU)
Flash the correct dataset.
90A2

Diagnostic Manual(Immobilizer) MAN-00056-16
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
90A2

Diagnostic Manual(Immobilizer) MAN-00056-17
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Immobilizer code
DTC Diagnostic item
90A3 No EMS ACK after the signature response
+ EMS code
DTC Diagnostic item
P-1832 Immobilised conditon
Vehicle behaviour: Engine does not start, check lamp will blink/ON
Probable Cause:
No EMS Ack after the signature mismatch
Theft attempt is made.
Corrective Action:
Clear all errors in both EMS and ICU
If more than one error is found in EMS please follow the priority of the errors during. Here
below the errors are listed in the priority error.
+ EMS Error code
DTC Diagnostic item
P-183A Signature Mismatch
Probable Cause:
Invalid immobilizer ECU ( ICU)/ EMSECU.
Signature mismatch.
CAN wiring issues.
Corrective Action:
Check the CAN wiring – if it is correct.
Perform ICU- EMS learning.
Clear all errors in both EMS and ICU
+ EMS Error code
DTC Diagnostic item
P-183B EMS is locked
Probable Cause:
Invalid Immobilizer
CAN Wiring related
90A3

Diagnostic Manual(Immobilizer) MAN-00056-18
Scorpio Vlx/Sle/Lx (Refresh) Mar 2009/Rev 1
All copyrights reserved by
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 or whole of the
present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd.
Corrective Action:
Check the CAN wiring, if it is OK then look at the Immobilizer.
Perform EMS and ICU learning. Clear all errors in both EMS and ICU
+ EMS Error
DTC Diagnostic item
P-1832 Immobilized condition
Probable Cause:
Immobilizer circuit is faulty
Immobiliser ECU is not working properly.
Transponder is not working /faulty
EMS is flashed with wrong dataset
Corrective Action:
Check the Immobilizer circuit.
Clear the errors at EMS ECU and Immobilizer ECU (ICU).
Inform the customer about the theft attempt.
If wrong dataset- flash the correct dataset.
EMS Errors Priority
P0513 1
P183A 2
P0633 3
P183E 4
P183B 5
P1832 6
90A3