1811 / 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: 468 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.
Rear Defogger DTCs
B221E - 11: Heated Rear Windscreen Relay - circuit short to ground
Overview:
ISO Code (DTC Code)
B221E - 11
Customer Symptom
1. Rear window always heated without input
2. In case of ETC variant CCM LED always ON without
user request.
3. In case of FATC variant CCM LED will be turned on
for short period and remains OFF after user request.
Fault Effects (On Vehicle)
1. Rear de-fogger always on
2. Battery discharge
Lamp Status (If Any)
NA
Fault Detection Condition
If engine is running and rear-defogger is requested ON and
the rear defogger relay is shorted to ground.
Normal Operating Condition
Rear window will be started heating only on user request.
Probable Trouble Area
1. BCM Cockpit Wiring harness faulty
2. BCM connector Fault
3. Infotainment ECU Fault
4. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
If engine is running with more than 600 rpm, the Rear Defogger would be started by pressing Rear Defogger
switch either on the FACIA switch bank or on FATC control panel.
Preliminary Checks:
1. Check Battery Voltage (9V-16V)
2. Check ECU pins for oxidation, bending & damage.