Diagnostic Manual
(Immobilizer)
MAN-00056
-
17
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.
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
