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Author: Balaji / Amar /
Nitin / Umapathi /
Deepak
Page: 125 of 138
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TATA MOTORS Ltd.
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U0401-81:- Invalid Data Received From ECM
Overview:-
ISO Code
U0401-81
Customer Symptom
Engine Coolant temp lamp ON, No Indication on Temp
bar graph display, AFE,IFE screen display will be --.--,
Current gear display will be ‘F’
Fault Effects (On Vehicle)
Engine Coolant temp lamp ON, No Indication on Temp
bar graph display, AFE,IFE screen display will be --.--,
Current gear display will be ‘F’
Lamp Status (If Any)
Engine Coolant temp lamp ON
Fault Detection Condition
Relevant functional DTCs present in ECM
Normal Operating Condition
ECM ECU sends correct data in normal condition.
Probable Trouble Area
Incorrect data received from ECM.
Healing Condition
After rectifying relevant functional failures in the ECM
ECU
Trouble Shooting:-