Vehicle Platform: OSPREY ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 1.4 Date: 15 May 2018 Author: Body CoC Page: 795 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. B163F– 23: Tailgate Unlock Switch– Signal Stuck Low Overview: ISO Code B163F – 23 Customer Symptom Tailgate Unlock Switch does not operate. Fault Effects (On Vehicle) Tailgate Unlock Switch does not operate. Lamp Status (If Any) N.A. Fault Detection Condition This fault gets logged by BCM; if signal stuck low condition is detected for Tailgate Unlock Switch. Normal Operating Condition If the tailgate is locked and Tailgate Unlock Switch is press then BCM shall immediately unlock the tailgate. Probable Trouble Area 1. BCM connector Fault. 2. Internal Unlock switch input wire Short to ground from cockpit wiring harness. 3. Switch damaged or stuck 4. BCM ECU fault. Healing Condition 1. Ignition OFF ON 2. Clear DTC Command Component Details: If Tailgate Unlock Switch is press then BCM shall provide the unlock pulse on electrical tailgate output pin and tailgate shall get unlock accordingly. Preliminary Checks: 2. Check Battery Voltage (12.5 V & above) 3. Check ECU pins for oxidation, bending & damage.
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