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 | 254 U0046-88 :- Vehicle Communication Bus C-Bus off Overview: ISO Code U0046-88 Customer Symptom Warning lamps on Fault Effects (On Vehicle) ESC,HDC, AVH, HHC & APB– Not Available EBD, ABS – Depends on fault type Lamp Status (If Any) ESC, AVH, HHC & APB – Lamp ON ABS & EBD - Depends on fault type Fault Detection Condition P-CAN line short Normal Operating Condition ECU communicates properly with TML diagnostic Tool. Probable Trouble Area Powertrain CAN Bus Healing Condition CAN lines connected properly/No pin Backout /No any short circuit conditions Preliminary Check: 1. Check resistance in Diagnostic CAN pin no. 6 and 14. It should be 120 Ω. 2. Check for short conditions at I VBAC ECU 46 pin connector between CAN_H (pin no. 4) -CAN_L (pin no.5), CAN_H (pin no.4 )-GND (pin no. 14 & 46), CAN_L (pin no. 5)-GND (pin no. 14 & 46), CAN_H (pin no.4)-Vbatt (pin no.1) and CAN_L (pin no. 5)-GND (pin no. 14 &46). There should not be any short circuit conditions. 3. Check if any Pin backed out from cavity (pin no 4 and 5) at I VBAC ECU 46 pin connector. 4. Read IVN DTCs in I VBAC in IGN ON condition Note: After rectification please give Ignition latch to heal the DTC.
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