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: 597 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.

P2565-12:Turbocharger Boost Control sensor "A" Circuit High: Variable Geometry Turbocharger position sensor

electrical failure (circuit short to battery)

Overview:

DTC Description (User Friendly)

Turbocharger Boost Control sensor "A" Circuit High: Variable

Geometry Turbocharger position sensor electrical failure

(circuit short to battery)

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)

1. The raw voltage value from the ADC is greater than

the SRC Max limit 4850 volt.

2. If pin no 4 of VGT Connector short to battery.

Normal Operating Condition

Proper wire harness connection between EMS ECU and VGT

Actuator.

Probable Trouble Area

Wiring harness connections between VGT Actuator and EMS

ECU.

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.

Trouble Shooting: