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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: 128 of 855
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B221A– 12: Headlamp On Signal – circuit short to battery
Overview:
ISO Code
B221A - 12
Customer Symptom
Headlamp always OFF
Fault Effects (On Vehicle)
Headlamp lamps always OFF
Lamp Status (If Any)
Always OFF
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 battery 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 wire Short to
battery
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:
1. Check Battery Voltage ( 9 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-