TIAGO

TIAGO AMT Gasoline

DTC Troubleshooting Guide

Version: 2.0

Date: 06-06-2016

Author: Sathi/Anupama

Page: 316 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.

101.

P062F- 07: TCU EEPROM Tuning Data Alteration Error

Overview:

ISO Code

P062F- 07

Customer Symptom

Transmission Fault Lamp ON

Sudden Shift to neutral while driving

Gearshift malfunctions

Fault Effects (On Vehicle)

Sudden Shift to neutral while driving

Gearshift malfunctions

Lamp Status (If Any)

Transmission Fault Lamp ON

Fault Detection Condition

This fault gets detected during TCU power ON, if

Self tuned data stored in EEPROM is found altered.

Normal Operating Condition

EEPROM integrity is valid

Probable Trouble Area

TCU damage

Healing Condition

Immediately after detection of valid EEPROM integrity

Component Details:

The Problem may occur due to an internal damage to TCU.

Preliminary Checks:

1) Battery voltage

2) Check for damage or back out of pins at TCU connectors.

3) Check correct fitment of ground cable connections on vehicle chassis (tightness, corrosion of mounting bolts etc.)

Trouble Shooting:-

Step Checks

IF YES

IF NO

Check Battery and Ignition supplies at pins

1,3and 5 respectively. Both are correct?

Go to Step 2

rectify harness

connections as per the

circuit schematic

Is there any pin back

out/damage/rust/oxidation observed on

TCU Connector?

Clean or repair or replace

connector

Go to Step 3

Fault Still Persists?

Replace TCU

Follow the steps again for

reconfirmation

on:-

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:

Component Location & Image:-

Connector Location: -

Connector View & Information: -