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 | 129 U0140-87 :- Lost Communication With Body Control Module-Missing Message Overview: ISO Code U0140-87 Customer Symptom None Fault Effects (On Vehicle) ABS, EBD, ESC – Available Lamp Status (If Any) ABS – OFF, EBD – OFF,ESC – OFF, AVH- ON, HHC-ON , APB-ON Fault Detection Condition 1. BCM connector is not connected properly or disconnected from its location. 2. CAN wire from BCM connector side are disconnected 3. BCM IGN & Battery fuse blown. 4. CAN_H, CAN_L or both lines of BCM are open circuit Normal Operating Condition BCM ECU communicates properly with TML diagnostic Tool. Probable Trouble Area 1. BCM connector / BCM fuse. 2. CAN lines of BCM ECU Healing Condition 1. BCM ECU is connected and no wiring harness issues from TCM side 2. CAN_H, CAN_L or/ and both lines of BCM are connected properly Preliminary Check: Check resistance in Diagnostic CAN pin no. 6 and 14. It should be 120 ohm. Check CAN connection of BCM ECU with vehicle network, There should not be any short circuit conditions. 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. Check continuity between IPC CAN_H (pin no. 8) vehicle side connector to OBD connector CAN_H (pin no. 6) and CAN_L (pin no. 7) vehicle side connector to ODB connector (pin no.14). 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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