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Author: Balaji / Amar /
Nitin / Umapathi /
Deepak
Page: 86 of 138
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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
EPAS lamp ON , CE Lamp ON,MIL Lamp ON,ABS Lamp
ON,TCM Lamp ON,SRS Lamp ON,EBD Lamp ON
Fault Effects (On Vehicle)
Default steering assistance, ECM will go into default mode,
ABS degraded functionality, TCM degraded functionality
Lamp Status (If Any)
EPAS lamp ON , CE Lamp ON,MIL Lamp ON,ABS Lamp
ON,TCM Lamp ON,SRS Lamp ON,EBD Lamp ON
Fault Detection Condition
Open circuit of the both CAN_H (connector pin no.6) and
CAN_L(connector pin no.5), only CANH, only CANL
Normal Operating Condition
ECU communicates properly with all ECUs.
Probable Trouble Area
CAN_H and CAN_L wires
Healing Condition
Reconnection of the CAN_H ( connector pin No.6) and
CAN_L(connector pin no.5)with the main CAN bus