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TIAGO/TIGOR AMT Gasoline
DTC Troubleshooting Guide
Version: 4.0
Date: 18-04-2017
Author: Sathi/Anupama
Page: 367 of 427
Copyright ©
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.
Trouble Shooting:-
Start
Read IVN DTCs in TCM
Is
MTO logged against ABS
in TCM in current state
?
No (In history)
Check continuity between TCM CAN_H (25 ) to ABS
CAN_H(pin no. 26) and TCM CAN_L (28 ) to ABS
CAN_L(pin no. 14) in vehicle wiring side connector.
Is continuity
there?
Repair the wiring harness if
continuity is not there
Clear DTC
Stop
Yes
Yes
No
U0121-08 Loss of communication with Antilock Braking System-
Message Failure
1. Check ABS ECU fuses ( Battery fuse
25A, Ignition fuse 5A) blown.
2. Also, check ABS ECU is powered up
properly. ABS Battery(pin. 1,25),
IGN(pin.28) and GND(pin 13, 38)
connected properly with ABS ECU.