Vehicle Platform: Tiago,Tigor & Osprey ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 2.0 Date: 22-10-2018 Author: Parag K Page: 725 of 737 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. B160B– 14: Door Unlock Control Driver Relay/Tailgate Unlock Control Relay– Short to Ground or Open Overview: ISO Code B160B– 14 Customer Symptom No locking action happened on operating the vehicle lock. Fault Effects (On Vehicle) All doors/Tailgate gets unlocked and will not lock Lamp Status (If Any) NA Fault Detection Condition This fault gets logged by BCM when Door unlock control relay/Tailgate unlock control relay is short to ground or open Normal Operating Condition Vehicle shall get locked and unlocked properly. Probable Trouble Area 1. All door unlock relay/Tailgate is short to ground. 2. Open circuit between BCM and All door unlock/ Tailgate Unlock 3. BCM connector wired wrong. 4. BCM mating connector is faulty. 5. Harness wire shorted 6. Relay damaged/Faulty. Healing Condition 1.Ignition OFF ON 2.Clear DTC Command Component Details: Door Relay, BCM connector Preliminary Checks: 7. Check Battery Voltage (9V-16V) 8. Check ECU pins for oxidation, bending & damage. Trouble Shooting:-
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