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NEXON EV
X114H
DTC Troubleshooting Data
Version: 3.0
Date: 27-May-2020
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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.
P220016:- KL30 (12V LV supply to OBC) under voltage
Overview:
ISO Code (If applicable)
P220016
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 if OBC LV Supply voltage is less than 7.5±0.33V
Normal Operating Condition
LV supply voltage of OBC is in the range of 7.5V to 16.5V
Probable Trouble Area
1. LV battery voltage is too low
2. Voltage sensor failure inside OBC.
3. A/D inside OBC is failed.
4. DC- DC converter low output voltage
5. No proper connection between DC DC converter & 12V LV battery
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. Without the LV supply charging is
not possible.
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 LV Battery voltage to be in range (7.5V - 14V)
c) Check LV Supply Connection of OBC ( KL30, LV connector pin: H1) for damage (connectors, terminals bending &
rusting of pins)
d) Check Ground connection of OBC ( KL31, LV connector pin: G4)
On-Board charger
230V AC supply
HV Battery
LV signal connector