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Q5/X451 FATC
DTC Troubleshooting Data
Version: 1.0
Date: 16-Oct-2018
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.
Author: ERC
Page: 190 of 202
U0140-08:- Lost communication with Body Control Module- Message Timeout Failure
Overview:
ISO Code
U0140-08
Customer Symptom
Reduced climate control functionality and performance
Fault Effects (On Vehicle)
Reduced climate control functionality and performance
Lamp Status (If Any)
1) The lost communication with BCM DTC is in active state in fault memory.
2) The HVAC outputs (motors and compressor request signal) should be functional
using default data values
3) CAN communication should be normal but BCM node message should
disappear.
4) The lost communication with BCM DTC is in passive state in fault memory.
5) The HVAC outputs (motors and compressor request signal) should be respond to
the panel request.
6) CAN communication should be normal.
Fault Detection Condition
1.
BCM connector is not connected properly or disconnected from its
location.
2.
CAN Stub wire from IPC connector side is disconnected.
3.
BCM ECU is not powered up.
Normal Operating
Condition
BCM ECU communicates properly with TML diagnostic Tool.
Probable Trouble Area
Disconnection of the BCM connector
Healing Condition
To fix the BCM connector correctly and Fix the wiring harness issues from IPC side.