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OSPREY- Application
DTC Troubleshooting Data
Version: 4.0
Date: 10-02-2017
Prepared by: Mithipati Prasad
Checked by: G S Raju / Senthilnathan S
Page: 565 of 654
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TATA MOTORS Ltd.
This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
P0513: Incorrect Immobilizer Key – EMS and VICM Authentication failed
Overview:
DTC Description as per ISO standard
Incorrect Immobilizer Key
ECU Pin Number
-
Customer Symptom
Vehicle cannot be started.
Fault Effects (On Vehicle)
Vehicle cannot be started.
Lamp Status
Immobilizer status lamp will come ON
Fault Detection Condition (Root cause)
This fault occurs when AES-Key is not programmed correctly in
either EMS or VICM ECU
Normal Operating Condition
Authentication between EMS & Immo is successful
Probable Trouble Area
AES key not programmed correctly either in EMS / Immo, Immo
Unit, EMS ECU.
Healing Condition
After Successful Immo Pairing, In the same Ignition cycle if EMS /
Immo hasn’t entered anti
scanning mode.
After Successful Immo pairing, give a power latch of 20 secs and
turn the Ignition ON.
Component Details:
Immobilizer system is designed to prevent vehicle theft by electronically disabling the engine starting system. The engine
can be started only with vehicle’s original immobilizer ignition key, w
hich has an electronic identification programmed
code. Immobilizer unit (ICU) is an add-on part on the ignition switch, fitted on the steering column. The engine can be
started only with the vehicle’s original immobilizer ignition key. The electronic key
communicates the identification code to
ICU when the key is turned to the "Ignition ON" position.
Engine will allow the Vehicle cranking only if the authentication between EMS and IMMO is successful and Transponder /
key used for cranking is paired to the Immobilizer unit.
Preliminary Checks
x
Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If
yes, go ahead with next steps. If not, check for other DTC’s presence.
x
Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
earlier issue closure.
x
Check whether the Immo telltale in the instrument cluster is turned ON. If not, confirm that vehicle starting issue is
not related to Immobilizer.
x
Check whether the ignition is turned On with correct transponder key.
x
Read Immo status from the diagnostic tool, Immo status shall be
–
‘Authentication between EMS and IMMO failed
/ Bad authentication’
&& Engine starting disabled by EMS. If Immo status is not as above, then vehicle not starting
issue is not related to Immobilizer