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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.
P130016:- KL30 (12V LV Supply to DC-DC) severely over voltage
Overview:-
ISO Code (If applicable)
P130016
Customer Symptom
NA
Fault Effect (On Vehicle)
DCDC Converter is not charging LV battery. Vehicle stops when LV battery is
completely drained
Lamp Status (If Any)
NA
DTC Detection Condition
This DTC gets logged if value of KL30 voltage is higher than 18.3V.
Normal Operating Condition
DCDC converter LV supply voltage in the range of 8V to 16V
Probable Trouble Area
1.
LV battery voltage is too high
2. DC DC converter high o/p voltage
3. Voltage sensor is failed
4. A/D is failed
Healing Condition
Ignition OFF wait till VCU sleeps & Ignition ON
Write up for
the system:-
HV DCDC Converter converts DC high voltage to low voltage to charge 12V battery. The conversion starts with wakeup and
enable signal to DCDC converter from VCU.
Pre-Check Points:-
KL 30
12V LV supply to DC DC Converter
KL 31
LV Ground to DC DC Converter
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 DCDC ( KL30, LV connector pin: 4) for damage (connectors, terminals
bending & rusting of pins)
d) Check LV ground Connection to DCDC (KL31, LV connector pin:8) for any damage.
LV Signal Connector
HV Battery
DCDC Converter
12V LV Battery