HARRIER BOOK 2

Q501 4 Cylinder MT Application

DTC Troubleshooting Data

Version: 0.1

Date: 21-Sep-2018

Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta

Checked By: Yogesh Jadhav

Approved By: Satish Kumar P

Page: 573 of 1052

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.

P0048-12: Turbocharger/Supercharger Boost Control "A" Circuit High : Variable geometry turbocharger output 1

signal high

Overview:

DTC Description (User Friendly)

Turbocharger/Supercharger Boost Control "A" Circuit High :

Variable geometry turbocharger output 1 signal high

ECU Pin Number

A039, A077, A076, A003, A025

Customer Symptom

MIL ON, CEL OFF

Fault Effects (On Vehicle)

Lamp Status (If Any)

MIL ON. MIL Turns Off as and when fault condition is not

present / healed.

Fault Detection Condition (Root cause)

This fault gets logged if the VGT valve control pin A03 of EMS

ECU is short circuited to battery supply on out1.

Normal Operating Condition

Healthy wiring harness connections between EMS ECU and

VGT Valve.

Probable Trouble Area

Wiring Harness connections between EMS ECU & VGT valve

Healing Condition

Rectify the error Clear through diagnostic tool.

Ignition OFF & ON

Component Details:

The turbo charger position sensor is used in a pneumatic actuator to precisely detect the actual position of the variable

turbo geometry mechanism. This leads to improved performance and reduces the fuel consumption. A turbocharger is

turbine-

driven

forced induction d

evice that increases an internal combustion engine's efficiency and power output by

forcing extra

air

into the combustion chamber.

Preliminary Checks:

1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above

Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.

2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with

respect to earlier issue closure.

3. Check for Damage in EMS ECU connector / VGT Actuator and VGT position sensor.

4. Check for any back out of pins at EMS ECU connector / VGT Actuator and VGT position sensor.

5. Check for any damage of pins at EMS ECU connector / VGT Actuator and VGT position sensor.