TIAGO

TIAGO AMT Gasoline

DTC Troubleshooting Guide

Version: 2.0

Date: 06-06-2016

Author: Sathi/Anupama

Page: 308 of 424

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.

97.

P1711-02: Battery Supply over threshold

Overview:

ISO Code

P1711-02

Customer Symptom

Fault Effects (On Vehicle)

Lamp Status (If Any)

Transmission Fault Lamp OFF

Fault Detection Condition

This fault gets detected after Ignition On when a gearshift is

not in progress and a battery voltage is detected by TCU is

above a threshold.

Normal Operating Condition

Battery voltage will normally be in healthy range for a charged

battery

Probable Trouble Area

Wiring Harness Connections / TCU/ battery/ alternator

Healing Condition

2000 milliseconds after signal

Component Details:

There are 3 TCU power supplies 1 Ignition and 2 battery power for driving valves and the hydraulic pump.The Problem may

occur due to an electrical problem or internal damage to TCU.

Preliminary Checks:

1) Blown out TCU power fuses (2 X 30 Amp)

2) Battery voltage and state of charge.

3) Check for correct functioning of Alternator (Ref. EMS manual)

4) Loose Fitting TCU connectors.

5) Check for damage or back out of pins at TCU 28 Pin connector.

6) Check correct fitment of ground cable connections on vehicle chassis.

CAUTION!!

To Avoid Electrical damage to TCU/Kit components - In case of a blown out fuse, power supply, ignition and

ground pins of the TCU and chassis ground should first be checked for any short/open circuits before replacing the fuse.

Trouble Shooting:-

Step Checks

IF YES

IF NO

Check Battery and Ignition supplies at pins

5, 1 and 3. Also check resistance between

Battery terminals and TCU power and

Ignition pins. Are resistances and

continuities OK?

Go to Step 2

rectify harness

connections as per the

circuit schematic

Is there any pin back

out/damage/rust/oxidation observed on

TCU 28 pin Connector?

Clean or repair or replace

connector

Go to Step 3

Fault Still Persists?

Replace TCU

Follow the steps again for

reconfirmation

confirmation:-

the following points by referring TCU parameters using TML diagnostic tool

before handing over to customer.

Drive the vehicle through all gears in both Automatic and Manual modes

Ensure no DTC is active and Transmission Fault Lamp is OFF.

Circuit Schematic Diagram: