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Q501 4 Cylinder MT Application
DTC Troubleshooting Data
Version: 0.1
Date: 21-Sep-2018
Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta
Checked By: Yogesh Jadhav
Approved By: Satish Kumar P
Page: 247 of 1052
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.
P3017-95: Immobilizer : No valid key was detected
Overview:
DTC Description (User Friendly)
Immobilizer : No valid key was detected
ECU Pin Number
Customer Symptom
Vehicle cannot be started.
Fault Effects (On Vehicle)
Vehicle cannot be started.
Lamp Status (If Any)
Immobilizer status lamp will come ON. MIL, CEL OFF
Fault Detection Condition (Root cause)
This fault occurs when unlearnt/invalid key (Transponder key
which is not paired to Immo) is used to perform the vehicle
start. No valid key was detected.
Normal Operating Condition
Valid vehicle key is used for vehicle start.
Successful authentication between Immo and EMS.
Probable Trouble Area
Immobilizer, transponder key (E-Key).
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, which 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:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above
Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with
respect to earlier issue closure.
3. As this fault is related to Key pairing between vehicle transponder / Key and immobilizer unit, check for faults in
Immobilizer and rectify the fault by following its rectification procedure.