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NEXON EV
X114H
DTC Troubleshooting Data
Version: 3.0
Date: 27-May-2020
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94
Author: K Tejaswini Manasa/ Navya Krishnan/Gaurav Jha
Copyright © TATA MOTORS Ltd.
This document must not be used in anyway, such as copying and redistributing to third parties, without the consent of author.
U140088:- CAN communication with BMS timeout
Overview:
ISO Code (If applicable)
U140088
Customer Symptom
NA
Fault Effect (On Vehicle)
OBC will stop charging HV battery
Lamp Status (If Any)
NA
DTC Detection Condition
This DTC gets logged when OBC lost CAN (timeout 2Seconds) and
retry 3 times
Normal Operating Condition
CAN communication normal
Probable Trouble Area
Lost of CAN
Healing Condition
Disconnect the gun and connect back after VCU sleep
Write up for
the system:-
The on-board charger (OBC) takes AC input and converts it to direct current to charge a HV battery. The LV supply of OBC
is from 12V battery. It requires AC HV supply voltage of 230V, 50Hz to charge the HV battery.
Pre-Check Points:
KL 30
12V LV supply to OBC
KL 31
LV/Chassis ground to OBC
a) Check for proper terminal connection of 12V LV Battery
b) Check for 12V LV Battery Voltage is with in the range ( 7.5V to 14V)
TroubleShooting:-
Flow Diagram or table format for diagnosing the fault code
Step no
.
Description
Check Point
if YES
if NO
1
Connect the Charging Gun & switch ON
the AC supply. check for the fault code.
Fault code U140088
is present?
Replace OBC.
Repair complete.
On-Board charger
230V AC supply
HV Battery
LV signal connector