TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

Vehicle Platform: NEXON, X4, Q5, TIGOR_MCE ECU Name: PEPS DTC Troubleshooting Data Version: 1.7 Date: 01 Aug 2019 Author: Rajasekhara Reddy Page: 125 of 389 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. B1644–05:- No UID Pairing Done – System programming Failures Overview:- ISO Code (DTC Code) B1644-05 Customer Symptom NA Fault Effects (On Vehicle) 1. Passive entry and passive start will not work with UID 2. On pressing the start-stop switch, “NoKeyDetectionTelltale” is present in instrument cluster even if UID is present (whose pairing is not successful) inside the vehicle Lamp Status (If Any) NA Fault Detection Condition At every IGN ON as well as after UID pairing, PEPS ECU shall check the UID pairing status. If no any UID is paired this DTC shall be set. Normal Operating Condition 1. Passive start is working fine with paired UIDs And 2. Passive entry is working fine with paired UIDs And 3. On pressing the start-stop switch, No “NoKeyDetectionTelltale” is present in instrument cluster with UID is present inside the vehicle. Probable Trouble Area 1. UID (Smart Key) And 2. Central Console LF Antenna. (Immo antenna) And 3. PEPS ECU Healing Condition Ignition Transition:- IGN OFF  IGN ON. On IGN ON during UID authentication no DTC is logged by PEPS. Table28:- B1644- 05 overview details Component Details:- 1. UID (Smart Key) 2. PEPS ECU 3. Central Console Antenna (Immo Antenna) Preliminary Checks:- 1. Check the battery voltage. It should be 9V and above. 2. Check respective ECU pins for oxidation, bending, & damage. 3. UID shall be inside and up to 7cm around the Front / Center console antenna. Troubleshooting:-