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: 129 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. B1651–05:- Partial UID Pairing Done – System programming Failures Overview:- ISO Code (DTC Code) B1644-05 Customer Symptom NA Fault Effects (On Vehicle) 1. Passive entry will not work with all paired UIDs And 2. Passive start will not work with all paired UIDs And 3. 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 And 4. Passive entry & passive start will work fine with one UID but not with all other UIDs. Lamp Status (If Any) NA Fault Detection Condition At every IGN ON as well as after UID pairing, PEPS ECU checks the UID pairing status. If number of UIDs paired >=1 but < number of UIDs to be paired, this DTC shall be set. Normal Operating Condition 1. Passive start is working fine with all paired UIDs And 2. Passive entry is working fine with all 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. Table29:- B1651- 05 overview details Component Details:- 4. UID (Smart Key) 5. PEPS ECU 6. Central Console Antenna (Immo Antenna) Preliminary Checks:- 4. Check the battery voltage. It should be 9V and above. 5. Check respective ECU pins for oxidation, bending, & damage. 6. UID shall be inside and up to 7cm around the Front / Center console antenna. Troubleshooting:-