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

Vehicle Platform: Zest, Bolt, Tiago, Tigor, Osprey, Q501, X451, Q502 ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 3.1 Date: 30-11-2019 Author: BCM COC Page: 489 of 1106 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. B161E - 23: Mechanical Key Reset Signal - signal stuck low Overview: ISO Code B161E - 23 Customer Symptom 1. Unlock operation through mechanical key does not work. 2. Auto Relock function, if enabled, does not work. Fault Effects (On Vehicle) 1. Unlock operation through mechanical key does not work. 2. Auto Relock function, if enabled, does not work. Lamp Status (If Any) NA Fault Detection Condition This fault will be logged after the input switch test routine execution. User has to operate the switch manually during routine. If signal stuck low fault is detected for Mechanical Key Reset switch, then this DTC code will be returned with the Routine results. Normal Operating Condition There should not be any fault returned by routine. Probable Trouble Area 1. BCM connector Fault. 2. Mechanical Key Reset switch is damaged or stuck or faulty or pressed too long (till switch stuck time Par_SwStuckTime"). 3. Mechanical Key Reset switch wire short to ground. 4. BCM ECU fault Healing Condition 1. Ignition OFF  ON 2. Clear DTC Command Component Details: BCM connectors, Mechanical Key Reset switch harness, Mechanical Key Reset switch. Preliminary Checks: 1. Check Battery Voltage (12.5 V & above) 2. Check ECU pins for oxidation, bending & damage.