TIAGO

TIAGO AMT Gasoline

DTC Troubleshooting Guide

Version: 2.0

Date: 06-06-2016

Author: Sathi/Anupama

Page: 378 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.

130.

U0100-08 Loss of communication with Engine Control Module-

Bus Signal/ Message Failure

Overview:

ISO Code

U0100-08

Customer Symptom

Transmission warning lamp will be ON

Fault Effects (On Vehicle)

1. If vehicle in standstill; it will not crank

2. If in running condition; no gear shift allowed,

emergency neutral engagement at low speeds.

3. Creeping Disabled

Lamp Status (If Any)

Transmission warning lamp will be ON

Fault Detection Condition

1. ECM connector is not connected properly or

disconnected from its location.

2. CAN wire from ECM connector side is disconnected.

3. ECM is not powered up.

4. CAN_H (25), CAN_L (28) or/ and both lines of TCM are

opened.

5. Wrong data length (less than expected data) from EMS

ECU

Normal Operating Condition

TCM ECU communicates properly with ECM ECU

Probable Trouble Area

1. Disconnection of the ECM ECU connector

2. CAN_H and CAN_L lines at TCM connector end

Healing Condition

1. To fix the ECM connector correctly

2. Fix the wiring harness issues from ECM side.

3. CAN_H, CAN_L or/ and both lines of TCM are

connected properly to the TCM connector.