HARRIER BOOK 2

Vehicle Platform: OSPREY

ECU Name: Hella Body Control Module (BCM) DTC

Troubleshooting Data

Version: 1.4

Date: 15 May 2018

Author: Body CoC

Page: 390 of 855

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.

B1620 - 12: Other Doors Switch - Circuit short to Battery or Open Circuit

Overview:

ISO Code

B1620 - 12

Customer Symptom

1. Interior Roof lamp in Auto mode selection

doesn’t operate when Other Doors is/ are

opened.

2. The IC shows Other Doors as closed status,

even if the Other Doors 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.

NOTE:

Here, Other Doors means Passenger door, Rear Left

Door and Rear Right Door

Fault Effects (On Vehicle)

Interior Roof lamp in Auto mode selection does not

operate when Other doors is/ are opened.

Lamp Status (If Any)

1. Roof lamp in Auto mode selection is OFF.

2. IC shows Other Doors 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 Other Doors 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. Left side and Right side wiring harness Short to

battery or open circuit

3. Other Doors Ajar Switch is damaged or stuck or

faulty

4. BCM ECU fault

Healing Condition

1. Ignition OFF



2. Clear DTC Command

Component Details:

Other Door Ajar Switch, BCM connector

Functionality:

If the Other door state is short to Battery or Open Circuit, then the Other door state is in closed state.

If the Other door is closed, then BCM shall receive the feedback of Other doors as closed status.

Preliminary Checks:

1. Check Battery Voltage (12.5 V & above)

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