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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: 266 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.
B220A – 11: Front Fog Lamp Control Switch – Short to Ground
Overview:
ISO Code
B220A - 11
Customer Symptom
1. Front fog lamps always ON.
2. Facia Switch illumination for fog lamp always ON
Fault Effects (On Vehicle)
1. Front fog lamps always ON.
2. Facia Switch illumination for fog lamp always ON
3. Battery Drain
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 fault is detected for front fog lamp
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. Front fog lamp switch input wire Short to ground from
cockpit wiring harness
3. Switch damaged or stuck
4. Facia Switch connector fault.
5. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
Front fog lamp switch is part of facia switch bank. If the IGN is ON and headlamps / position lamps are ON and
user presses the front fog lamp switch, front fog lamps will turn ON.
Preliminary Checks:
1. Check Battery Voltage (12.5 V & above)
2. Check ECU pins for oxidation, bending & damage.
Trouble Shooting:-