TIGOR AMT

TIAGO/TIGOR AMT Gasoline

DTC Troubleshooting Guide

Version: 4.0

Date: 18-04-2017

Author: Sathi/Anupama

Page: 408 of 427

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.

Generic Troubleshooting Guidelines

There may be general failures in the vehicle systems where it may not be possible to locate and diagnose the

problem by reading a Diagnostic trouble code (DTC), some examples may be:

1) No diagnostic tool connection

2) Permanent CAN errors.

3) TCU Power/Crank input/Grounding problems

4) TCU internal damages

In such cases, it will be helpful to diagnose the general health of the transmission AMT kit by following below

guidelines.

Sno Test

Procedure

Expected

Comments

Check Gear shifting at engine

OFF condition

Press brake, move lever to

R/A

Reverse/1

gear gets

engaged

If successfully

shifting for a number

of times then

hydraulics are OK,

check step 5

onwards

Hydraulic Pump supply

Check Electric motor

connections

Hydraulic pump

turning ON makes an

audible humming

sound each ign key

ON.

Check hydraulic pressure

Read Pressure using the

diagnostic tool

Should be around 38

bar

If hydraulic pump

turning ON is audible

but pressure rise is

not observed, kit

should be visually

checked for leakage.

TCU ignition, battery supply

fuses (10 A & 2X30 A) & TCU

ground

Available on fuse box in

engine compartment,

Check ground Pin 1&2 of TCU

Cranking (K50) wire request

12Volt on Pin 14 on TCU while

cranking

TCU enables

cranking only when

it receives K50 wired

request

CAN Line fault

CAN H-CAN H and CAN L –

CAN L continuity and

resistance

continuity between

EMS-TCU and total

resistance 60 ohm