4022 / 4910
{Osprey CCM}
DTC Troubleshooting Data
Version: 2.0
Date: 28-Jul-17
Author: ERC
Page: 206 of 244
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TATA MOTORS Ltd.
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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-Vbatt 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.