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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
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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:-