4240 / 4910
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: 180 of 202
U0100-08:- Lost communication with ECM- Message Timeout Failure
Overview:
ISO Code
U0100-08
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 ECM/PCM "A" DTC is in active state in fault
memory.
2) The HVAC outputs (motors and compressor request signal) should be
functional using default data values[As mentioned in SSTP_1237].
3) CAN communication should be normal but ECM/PCM "A" node message
should disappear.
4) The lost communication with ECM/PCM "A" 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.
ECM connector is not connected properly or disconnected from its
location
2.
CAN Stub wire from ECM connector side is disconnected.
3.
ECM ECU is not powered up.
Normal Operating Condition
ECM ECU communicates properly TML diagnostic Tool.
Probable Trouble Area
Disconnection of the ECM connector
Healing Condition
To fix the ECM connector correctly and Fix the wiring harness issues from ECM
side.