NEXON DIAGNOSTIC MANUAL

OSPREY- Application

DTC Troubleshooting Data

Version: 4.0

Date: 10-02-2017

Prepared by: Mithipati Prasad

Checked by: G S Raju / Senthilnathan S

Page: 516 of 654

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.

P2266: Water in fuel sensor fault - Short to ground

Overview:

DTC Description as per ISO standard

Water in Fuel sensor short to Ground.

ECU Pin Number

59, 74

Customer Symptom

Engine restricted performance

Fault Effects (On Vehicle)

Disables EGR by setting desired rate to 0. This will affect EGRH rate,

EGRL rate, IFLAP, Throttle, Intake manifold pressure and boost pressure

Reduced torque mode activated.

Lamp Status (If Any)

CE lamp is on.

Fault Detection Condition

This DTC gets logged due to water in fuel sensor is short circuited to

Ground

Normal Operating Condition

No electrical faults related to Water in Fuel sensor input

Probable Trouble Area

WIF sensor, EMS ECU, Wiring harness connections between WIF sensor

and EMS ECU

Healing Condition

Clear the errors, Ignition OFF to ON, engine idle, fly-up and specially

vehicle running in different speed condition

Component Details:

The Water in Fuel Sensor or WIF sensor indicates the presence of water in the fuel. It is installed in the fuel filter and

when the water level in the water separator reaches the warning level, the WIF sensor sends an electrical signal to the

ECU .The WIF sensor is used especially in the Common Rail engines to avoid the Fuel injector damage.

inary Checks:

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

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

Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to

earlier issue closure.

Loose/ Damaged Connections between WIF sensor and EMS ecu.

Check for back out of pins at both WIF sensor connector and ECU connector.

Check for damage of pins at both WIF sensor connector and ECU connector.