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: 973 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.

P2269-67: Water in Fuel Condition – Water in fuel filter (signal incorrect after event)

Overview:

DTC Description (User Friendly)

Water in Fuel Filter (Signal incorrect after event)

ECU Pin Number

K009

Customer Symptom

MIL OFF, CEL OFF. Water in Fuel Lamp ON, Engine mis-firing,

Poor fuel Economy, Injector damage if vehicle is operated for long

duration with this fault condition.

Fault Effects (On Vehicle)

Engine mis-firing, Poor fuel Economy, Injector damage if vehicle is

operated for long duration with this fault condition.

Lamp Status (If Any)

MIL OFF, CEL OFF, WIF Lamp ON.

Fault Detection Condition (Root cause)

This fault is logged if the water in fuel condition is detected by

EMS ECU i.e water accumulated in fuel filter crosses the

threshold.

Normal Operating Condition

No water in fuel.

Probable Trouble Area

Wiring Harness connections between the WIF sensor and EMS

ECU

WIF Sensor

EMS ECU

Healing Condition

Rectify the error

Clear through diagnostic tool

Ignition OFF & ON

Component Details:

A Water in Fuel or WIF sensor detects the presence of water in diesel fuel typically using the difference of electric

conductivity between two electrodes through water and fuel. Detection of water in fuel can prevent or at least reduce any

damage water could cause to fuel injectors by providing warning to user about the water in fuel condition.

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 of pins / back out of pins at ECU connector / Water in Fuel sensor connector. If found, rectify.

4. Check the wiring harness connections between the Water in Fuel Sensor and EMS ECU.

5. Check whether the fuel is contaminated with water / ethanol. If so, replace the contaminated fuel and warn driver

for not filling good quality fuel.

6. Check for water entry in fuel filter. If so, drain the water in fuel filter and check for presence of free water entry

paths into fuel filter.

7. Perform the water wading test with Bonnet open and check whether the Water is entering into fuel filter. If yes,

look for sneak paths of water into fuel filter and rectify them. If rectification is not possible, then call hotline for

assistance.