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: 377 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. B2239 – 12: Rear Fog Lamp Control Switch – Short to Battery Overview: ISO Code B2239 - 12 Customer Symptom 1. Rear fog lamps always OFF. 2. Facia Switch illumination for fog lamp always OFF Fault Effects (On Vehicle) 1. Rear fog lamps always OFF. 2. Facia Switch illumination for fog lamp 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 Rear fog lamp 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. [Cockpit] Rear fog lamp switch input wire Short to battery 3. Switch damaged or stuck 4. Facia Switch connector fault. 5. BCM ECU fault Healing Condition 1. Ignition OFF  ON 2. Clear DTC Command Component Details: Rear fog lamp switch is part of facia switch bank. If the IGN is ON and headlamps / position lamps are ON and user presses the front fog lamp switch, front fog lamps will turn ON. Preliminary Checks: 1. Check Battery Voltage (12.5 V & above) 2. Check ECU pins for oxidation, bending & damage. Trouble Shooting:-