1604 / 4910
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: 261 of 737
Copyright ©
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 – 23: Front Fog Lamp Control Switch – Signal Stuck Low
Overview:
ISO Code
B220A - 23
Customer Symptom
1. Front fog lamp does not operate.
Fault Effects (On Vehicle)
1. Front Fog lamp will not come ON
2. Facia Switch illumination for fog lamp will not turn ON
Lamp Status (If Any)
Always OFF
Fault Detection Condition
This fault gets logged by BCM; if signal stuck low condition is
detected for front fog lamp switch.
Normal Operating Condition
If the IGN is ON and headlamps / position lamps are ON then
front fog lamps shall turn ON immediately after pressing the
front fog lamp switch.
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:-