TIGOR AMT

TIAGO/TIGOR AMT Gasoline

DTC Troubleshooting Guide

Version: 4.0

Date: 18-04-2017

Author: Sathi/Anupama

Page: 366 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.

128.

U0121 -08:- Lost communication with Antilock Braking System

Module- ABS/ESP Bus signal/ Message Failure

Overview:

ISO Code

U0121-08

Customer Symptom

TBD

Fault Effects (On Vehicle)

TBD

Lamp Status (If Any)

TBD

Fault Detection Condition

1. ABS connector is not connected properly or

disconnected from its location.

2. ABS/ ESP is not powered up

3. ABS/ ESP connector is not connected/ disconnected

from vehicle side wiring harness.

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

opened

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

ABS ECU

Normal Operating Condition

TCM ECU communicates properly with ABS ECU.

Probable Trouble Area

1. Disconnection of the ABS connector

2. CAN_H and CAN_L lines at TCM connector end

Healing Condition

1. To fix the ABS connector correctly and Fix the wiring

harness issues from ABS side.

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

connected properly to the TCM connector.