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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: 109 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.
B221A – 11: Headlamp On Signal – Short to Ground
Overview:
ISO Code
B221A - 11
Customer Symptom
Headlamps always ON.
Fault Effects (On Vehicle)
Head lamps always ON.
Lamp Status (If Any)
Always ON
Fault Detection Condition
This fault will be logged after the input switch test routine
execution. User has to operate the switch manually during
routine. If short to ground circuit fault is detected for
Headlamp switch then this DTC code will be returned with the
Routine results.
Normal Operating Condition
There should not be any fault returned by routine
Probable Trouble Area
1. BCM connector Fault
2. Cockpit Headlamp switch input wiring short to ground
circuit
3. Switch damaged or stuck
4. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
HeadlampON switch is part of combi switch. If the IGN is at ACC/ON position and through combi switch head lamp are
turned ON then headlamps will turn ON.
Preliminary Checks:
3. Check Battery Voltage (9 V & above)
4. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-