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Vehicle Platform: OSPREY
ECU Name: Hella Body Control Module (BCM) DTC
Troubleshooting Data
Version: 1.4
Date: 15 May 2018
Author: Body CoC
Page: 426 of 855
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TATA MOTORS Ltd.
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B160A- 12: Door Second Stage UnLock/ Door UnLock control others Relay - Circuit short to Battery
Overview:
ISO Code
B160A - 12
Customer Symptom
All doors will not unlock
Fault Effects (On Vehicle)
All doors will not unlock
Lamp Status (If Any)
NA
Fault Detection Condition
This fault gets logged by BCM when door unlock control
others relay output is shorted to battery or open circuit.
Normal Operating Condition
All doors are unlocked after pressing RKE unlocks
switch/ internal knob.
Probable Trouble Area
1. BCM connector wired wrong
2. Cockpit harness wire shorted to battery
3. Relay damaged.
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
All doors are unlocked using door unlock control others relay when user press RKE unlock switch or internal
knob.
Doors unlock control others relay is active low.
Preliminary Checks:
1. Check Battery Voltage (12.5 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-