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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: 132 of 855
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TATA MOTORS Ltd.
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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:-