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 | 132 U0155-87 :- Lost Communication With Instrument Panel Cluster (IPC) Control Module-Missing Message Overview: ISO Code U0155-87 Customer Symptom None Fault Effects (On Vehicle) ABS, EBD & ESC – Available , AVH & APB- Not available Lamp Status (If Any) ABS – OFF, EBD – OFF, ESC – OFF, AVH & APB- Lamp ON Fault Detection Condition 1. IPC connector is not connected properly or disconnected from its location. 2. CAN wire from IPC connector side are disconnected 3. IPC IGN & Battery fuse blown. 4. CAN_H, CAN_L or both lines of IPC are open circuit Normal Operating Condition IPC ECU communicates properly with TML diagnostic Tool. Probable Trouble Area 1. IPC connector / IPC fuse. 2. CAN lines of IPC ECU Healing Condition 1. IPC ECU is connected and no wiring harness issues from TCM side 2. CAN_H, CAN_L or/ and both lines of IPC are connected properly Preliminary Check: Check resistance in Diagnostic CAN pin no. 6 and 14. It should be 120 ohm. Check CAN connection of IPC 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 in IGN ON condition Note: After rectification please give Ignition latch to heal the DTC.
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