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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: 391 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.
B2501- 12: Horn Relay - Circuit short to Battery
Overview:
ISO Code
B2501 - 12
Customer Symptom
Horn always OFF
Fault Effects (On Vehicle)
Horn always OFF
Lamp Status (If Any)
NA
Fault Detection Condition
This fault gets logged by BCM when horn relay output is
shorted to battery.
Normal Operating Condition
Mis-lock sound is occurred and all doors are locked when
driver door is closed and other door is opened and pressing
RKE locks switch.
Probable Trouble Area
1. BCM connector wired wrong
2. Cockpit harness wire shorted to battery or open circuit
3. Relay damaged.
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
Mis-lock sound is occurred and all doors are locked using horn relay when user press RKE lock switch.
Horn relay is active low.
Preliminary Checks:
1. Check Battery Voltage (12.5 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-