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: 334 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. B222D - 12: Low Beam Switch - Circuit short to Battery Overview: ISO Code B222D - 12 Customer Symptom Low beam always OFF Fault Effects (On Vehicle) Low beam always OFF Lamp Status (If Any) Always OFF 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 short to battery fault is detected for low beam 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. Low beam switch Short to battery from cockpit wiring harness 3. Switch damaged or stuck 4. Combi switch connector fault. 5. BCM ECU fault Healing Condition 1. Ignition OFF  ON 2. Clear DTC Command Component Details: Low beam switch is part of combination stalk switch and interfaced to the BCM. If the IGN is on and headlamps are ON and if the combi switch is at low beam position then low beams will turn ON. Preliminary Checks: 1. Check Battery Voltage (12.5 V & above) 2. Check ECU pins for oxidation, bending & damage. Trouble Shooting:-