HARRIER BOOK 2

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: 321 of 737

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.

Lock Control DTCs

B1301 - 11: Driver Door Ajar Switch - Circuit Short to Ground

Overview:

ISO Code (DTC Code)

B1301 - 11

Customer Symptom

1. The IC shows Driver Door as open status, even if the

driver door is closed as presumed by the customer.

2. Interior Roof lamp in Auto mode selection will ON for

10 minutes.

3. The Mis-lock sound occurs on RKE lock command.

4. The vehicle will not lock on providing the lock

command.

Fault Effects (On Vehicle)

1. Unnecessary battery power consumption (because

Interior Roof lamp in Auto mode selection will always

ON for 10 minutes.)

2. The vehicle will not enter into arm state, when RKE

lock is given and no alarm functionality will work.

Lamp Status (If Any)

1. Interior Roof lamp in Auto mode selection will ON for

10 minutes.

2. Driver door telltale status on IC shows 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 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 ground

3. Driver Door Ajar Switch is damaged or stuck or faulty

4. BCM ECU fault

Healing Condition

1. Ignition OFF



2. Clear DTC Command

Component Details:

Driver Door Switch, BCM connector

Functionality:

If the vehicle is unlocked and Driver door is opened, then the Driver door shall get opened.

If the Driver door state is Short to Ground, then the Driver door state is in opened/ ajar state.

If the Driver door is opened, then BCM shall receive the feedback of Driver door as open/ ajar status.

Preliminary Checks:

1. Check Battery Voltage (9V-16V)

2. Check ECU pins for oxidation, bending & damage.

Trouble Shooting: