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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: 325 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.
B1301 - 12: Driver Door Ajar Switch - Circuit short to Battery or Open Circuit
Overview:
ISO Code
B1301- 12
Customer Symptom
1. Interior Roof lamp in Auto mode selection doesn’t
operate when driver's door is opened.
2. The IC shows Driver Door as closed status, even if
the driver door is opened as presumed by the
customer.
3. The Mis-lock sound does not occurs on RKE lock
command.
4. The vehicle will get lock on RKE lock command.
Fault Effects (On Vehicle)
1. Interior lamps do not operate when driver's door
opened.
Lamp Status (If Any)
1. Roof lamp in Auto mode selection is OFF.
2. IC shows Driver Door closed status always
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 or open circuit fault is detected for
Driver Door Ajar 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. Right side wiring harness Short to battery or open
circuit
3. Driver Door Ajar Switch is damaged or stuck or faulty
4. BCM ECU fault
Healing Condition
1. Ignition OFF
ON
2. Clear DTC Command
Component Details:
Driver Door Switch, BCM connector
Functionality:
If the Driver door state is short to Battery or Open Circuit, then the Driver door state is in closed state.
If the Driver door is closed, then BCM shall receive the feedback of Driver door as closed status.
Preliminary Checks:
1.
Check Battery Voltage (12.5 V & above)
2.
Check ECU pins for oxidation, bending & damage.
Trouble Shooting: