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ABS - DTC Troubleshooting Data
(Bolt, Zest, Tiago, Pelican, Nexon & Tigor)
Version: 1.4
Date: 21 April 2017
Author: ERC - Chassis E&E
Page 148 of 166
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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.
U0028-13 - Vehicle Communication Bus A-open circuit
Overview
ISO Code
U0028-13
Customer Symptom
ABS lamp will be ON
Fault Effects (On Vehicle)
Engine Drag Torque control (EDTC) function will not be
available.
Lamp Status (If Any)
ABS lamp will be ON
Fault Detection Condition
This DTC will appear in case of following open circuit failures
1 CANH wire open (pin 26)
2. CANL wire open (pin 14)
3. Both CANH, CANL open
4. Short circuit between CANL-GND, CANH-Vbatt.
Normal Operating Condition
ECU communicates properly with TML diagnostic Tool.
Probable Trouble Area
CAN_H and CAN_L wires
Healing Condition
Reconnection of the CAN_H (connector pin 26) and CAN_L
(connector pin14) with the main CAN bus