Kanger 2.0 iVBAC DTC Troubleshooting data Version: 1.0 Date:31-March-22 Author: ERC, Chassis CoC This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. Copyright © TATA MOTORS Ltd. P a g e | 138 U0401-81 :- Invalid Data Received From ECM/PCM”A”-Invalid serial data received Overview: ISO Code U0401-81 Customer Symptom Warning Light Displayed Fault Effects (On Vehicle) ABS – Available (with reduced functionality), EBD – Available, ESP – Depends on fault type Lamp Status (If Any) ABS – OFF, EBD – OFF, ESP – Depends on fault type Fault Detection Condition Incorrect data received from ECM ECU Normal Operating Condition ECM ECU sends correct data in normal condition. Probable Trouble Area ECM ECU and its interface circuits and sensors Healing Condition After rectifying all the functional failures in the ECM ECU. Preliminary Check: 1. Check resistance in Diagnostic CAN pin no. 6 and 14. It should be 120 ohm. 2. Check DTCs IN EMS ECU, take actions as per DTCs found to resolve the issue. 3. Read IVN DTCs in I VBAC ECU in IGN ON condition. Note: After rectification please give Ignition latch to heal the DTC.
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