Vehicle Platform: Zest, Bolt, Tiago, Tigor, Osprey, Q501, X451, Q502 ECU Name: Hella Body Control Module (BCM) DTC Troubleshooting Data Version: 3.8 Date: 17-10-2022 Author: BCM COC Page: 30 of 1202 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. U0037 – 88 :- Vehicle Communication Bus B – Bus off Overview: ISO Code U0037-88 Customer Symptom Loss of much accessory function (park aid, seat heating, trailer support, Xenon lamps, some smart entry/start, Power Operated Tailgate and Infotainment) Fault Effects (On Vehicle) BCM functionality such as Hazard, Door indication, Lamp status, etc. does not work Lamp Status (If Any) EPAS lamp ON , CE Lamp ON,MIL Lamp ON,ABS Lamp ON,TCM Lamp ON,SRS Lamp ON,EBD Lamp ON Fault Detection Condition Short circuit between CAN_H -CAN_L, CAN_H -GND, CAN_L-Vbatt lines. This DTC may also get logged in case of CANH OR CAN L open circuit. Normal Operating Condition ECU communicates properly with all ECUs. Probable Trouble Area CAN_H and CAN_L wires Healing Condition Removal of the above mentioned shorts/open in the wiring harness or at ECU pin.
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