Vehicle Platform: OSPREY ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 1.4 Date: 15 May 2018 Author: Body CoC Page: 180 of 855 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. B221F – 15: Left Front Fog Lamp Circuit – Short to Battery or Open Circuit Overview: ISO Code B221F – 15 Customer Symptom 1. Left Front Fog Lamps always ON. 2. Facia Switch illumination for rear fog lamp always ON Fault Effects (On Vehicle) 1. Left Front Fog Lamps always ON. 2. Facia Switch illumination for rear fog lamp always ON 3. Battery drain Lamp Status (If Any) Always ON Fault Detection Condition This fault gets logged by BCM when left front fog lamp output is shorted to battery or open circuit Normal Operating Condition If the IGN is ON and headlamps / position lamps are ON then front fog lamps turn ON immediately after pressing the front fog lamp switch. Probable Trouble Area 1. BCM connector Fault 2. Left front fog lamp output wire Short to battery or open circuit 3. Left front Fog Lamp bulb blown /lamp damaged 4. BCM ECU fault 5. Left front fog lamp mating connector fault Healing Condition 1. Ignition OFF ON 2. Clear DTC Command Component Details: Left front fog lamps are located at left front side of vehicle. If the IGN is ON and headlamps / position lamps are ON and user presses the front fog lamp switch then front fog lamps turn ON. Preliminary Checks: 1. Check Battery Voltage (12.5 V & above) 2. Check ECU pins for oxidation, bending & damage. Trouble Shooting:-
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