Diagnostic Manual (Immobilizer) MAN-00056-2
Scorpio Vlx/Sle/Lx
(Refresh)
Mar 2009/Rev 1
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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.
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