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.
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