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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 1186 of 1203
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.
Trouble Shooting:-
Start
Read IVN DTCs in ECM
Is MTO logged
against HVAC Control Module
in current state?
No (In history)
Check continuity between
HVAC Control Module CAN_H (Connector C1 pin no. 24 ) to ECM
CAN_H(pin no. 132)
and
HVAC Control Module CAN_L (Connector C1 pin no. 22 ) to ECM
CAN_L(pin no. 144)
in vehicle wiring side connector.
Is continuity
there?
Repair the wiring harness
Clear DTC
Stop
Check Ignition (Connector C1 pin no.11), Battery
(Connector C1 pin no. 15,16) and Ground
(Connector C1 pin no. 1,2) of HVAC Control
Module is properly connected or not. Also check
fuse blown (Name: F18, Rating:10Amp
Do necessary repair in the harness
Yes
Yes
No
U0164-31 Loss of communication with HVAC
Control Module- Bus Signals/ Message Failures