NEXON DIAGNOSTIC MANUAL

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Author: Balaji / Amar /

Nitin / Umapathi /

Deepak

Page: 24 of 138

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.

Preliminary Checks:-

1. Check Battery Voltage is normal in the range (9v - 16v)

2. Check Fuel lines for Pinch/Cut.

3. Check ECU & Sensor pins for oxidation, bending & damage.

4. Check and ensure Fuel Sensor is giving linear Resistance output

w.r.to

the Fuel level.

5. Check Sensor resistance on Pin no. J1-11(FLS i/p) & J1-24(FLS Gnd) of the wired connector, whether it is

according to the design specifications.

Trouble Shooting:-

Turn ON Ignition.

Connect the TML Diagnostic Tool.

Check the status of DTC’s (Memorized/Current)

Record the DTC & Clear DTC’s

Turn Ignition OFF & ON

Verify If DTC B1909 -15 is present

Is DTC

B1909-15 is

Present?

Check for continuity between Pin

No.J1-1(Batt) & J1-11(FLS input)

of ECU Connector or FLS is Open

Circuited.

Is STB or

Open

present?

FLS input is Short Circuit to Ground.

Rectify Fault at wiring Harness & wait for

20sec to recover the fault.

Clear the DTC &

In low-end variant vehicle check the function of

Fuel Bars change on LCD display.

& In high-end variant vehicle check the change

in fuel level in Fuel bars.

Clear the DTC from the ECU

memory.

Turn Ignition OFF & ON.

In low-end variant vehicle check the

function of Fuel Bars change on

LCD display.

& In high-end variant vehicle check

the change in fuel level in Fuel bars.

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