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Author: Balaji / Amar /
Nitin / Umapathi /
Deepak
Page: 87 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.
U0028-88:- Vehicle Communication Bus A-Bus off
Overview:-
ISO Code
U0028-88
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
Short circuit between CAN_H -CAN_L, CAN_H -GND,
CAN_L-Battery lines. This DTC may also get logged in case
of CANH OR CAN L open circuit.
Normal Operating Condition
ECU communicates properly with all ECUs.
Probable Trouble Area
CAN_H and CAN_L wires
Healing Condition
Removal of the above mentioned shorts/open in the wiring
harness or at ECU pin.
Trouble Shooting:-