HARRIER BOOK 1

Anti-lock Braking System(ABS)

B. PERATING PROCEDURE :

Introduction :

The below screen guides user the general

settings and operating instructions of the Tata

Diagnostic Software application.

After opening the application, choose the

appropriate vehicle platform and vehicle variant.

Then click next.

1. Start Communication :

Once you arrive at below screen, you can see all

the ECUs present in that particular variant of the

chosen vehicle platform. Click on the Start button

next to ABS ECU to establish the communication

between ABS ECU and your PC. Refer

connection diagram below.

Once the communication is established the

SERVICES panel will open automatically. You can

see the moving green line at the bottom as a

representation of established communication

between ECU and your PC as shown in below

diagram.

2. Circuit Schematic :

Click on the Circuit Schematic button on the

toolbar to view circuit schematic.

3. Introduction Of Services Panel :

SERVICES panel contains command buttons to

execute various services supported by ECU. Also

at the bottom of the panel, displays ECU Details,

Mode of communication (e.g. Samtec USB) and

Version number of the software.

Click on the buttons to execute respective Service

of the ECU. Use the scroll bar to view more ECU

Services if available.

Services can be executed from “Services” menu

bar. Click on Services [Service name]. Auto

hiding of SERVICES panel is provided to have

bigger preview of services data.

4. ECU Identification Data and ECU

Parameters:

This service displays all ECU related data such as

ECU Container Number, System Name, Software

Version, Hardware Number, TATA Part number,

VIN Number, Variant Code etc.

Click on respective ECU tab to view detailed

information.

5. Read DTC’s:

This service reads the Diagnostic Trouble codes

(

DTCs

) recorded in the ECU. You can see

probable causes and corrective actions for a

particular DTC by selecting the DTC and clicking

on ‘Corrective Actions’ button. These DTCs can

be saved in excel format for future reference.

Select a DTC from the list and click on Corrective

Actions button. This helps the technician in

diagnosing the vehicle

6. Save DTC’s:

The DTC’s can be saved along with technician

information. Below is the screen requesting user

to enter technician details.

The DTC’s will be saved in .csv format

The saved DTC location path will be displayed as

shown above.

View DTC’s:

DTC files viewing window. Select file name from

the list to view it in excel.

7. Clear DTC’s :

The DTC’s can be cleared from the ECU using the

service of Clear DTC’s tab available with Read

DTC’s. While clearing the DTC’s user confirmation

is needed. Also the DTC’s will get saved

automatically before clearing the DTC’s from the

ECU. These saved DTC’s can be viewed later as

shown below.

8. Routine Tests :

In this service user can able to perform the static

routine tests to check the functioning and

communication between sensors and ECU

present. Following are the tests shown that can be

performed through routine test.

9. Input Output Control :

The IO control is used by the tester to actuate the

input signal, internal ECU function or control an

output (

actuator

) of an electronic system without

the input signal. The response from the ECU for

this service ensures proper functioning in the

ECU.

Follow the specified instructions to execute the

test.

10. Repair Bleeding :

The repair bleed service is used to perform the

secondary circuit bleeding to ensure that the

hydraulic system of ABS is free of bubble and Air.

NOTE :

For instruction on the complete procedure refer

“Secondary circuit bleeding” in Regular

maintenance of Brakes section.