Vehicle Platform: OSPREY ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 1.4 Date: 15 May 2018 Author: Body CoC Page: 319 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. B2239 – 12: Rear Fog Lamp Control Switch – Short to Battery or Open Circuit Overview: ISO Code B2239 - 12 Customer Symptom 1. Rear fog lamps always OFF. 2. Facia Switch illumination for rear fog lamp always OFF Fault Effects (On Vehicle) 1. Rear fog lamps always OFF. 2. Facia Switch illumination for raer 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 or open circuit 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. Rear fog lamp switch input wire Short to battery or open circuit from cockpit wiring harness 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 , front fog lamps are ON and user presses the rear fog lamp switch, rear 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:-
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