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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 1125 of 1203
Copyright ©
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.
P3017-04: Authentication between ECU and ICU fails & Invalid key detected– System Internal
Failures
Overview:
ISO Code
P3017-04
Customer Symptom
Vehicle will not start
Fault Effects (On Vehicle)
Fuel Supply for Ignition and Starter Command will be cut off by EMS ecu
Lamp Status (If Any)
Immo Lamp ON
Fault Detection Condition
This fault gets logged when the AES key / VIN written into the EMS ecu
and Immo mismatches.
Normal Operating Condition
Same VIN will be written into EMS ecu and Immobilizer
Probable Trouble Area
EMS ecu / Immobilizer
Healing Condition
After 1 drive cycle of fault rectification
Fault Permanent deletion
Stack Over flow
After 40 drive cycles
Diagnostic command to clear DTC’s
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, which has an electronic identification programmed
code.
Immobilizer unit (VICM) 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
immobilizer (VICM) when the key is turned to the "Ignition ON" position.
Immobilizer comes with two Electronic keys (E-key)
Preliminary Checks:
1. Check whether same VIN number is written into both EMS and ICU.
2. Read the AES key from Immobilizer and EMS ecu, check whether both the values are matching or not.