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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: 134 of 202
U3006-16:- Control Module Input Power “A” – Circuit Voltage below Threshold
Overview:
This fault will come if Input Power "A" is less than threshold voltage. (In ignition on & engine running
condition) Input Power "A" - is the Voltage Supply from battery.
ISO Code
U3006 - 16
Customer Symptom
FATC (LED etc.) goes OFF
Fault Effects (On Vehicle)
FATC will be OFF
Lamp Status (If Any)
1) The CCM ECU should turn OFF all outputs and control module input
power "A" circuit voltage below threshold DTC is in active state in fault
memory.
2) The HVAC outputs (all 3 actuator outputs, blower motor output and
compressor request signal) should be OFF and not respond to the panel
request.
3) CAN communication should work normal as long as the transceiver is
active.
4) The ECU should turn ON and resume normal functionality when fault
is healed and control module input power "A" circuit voltage below
threshold DTC is in passive state in fault memory.
5) The HVAC outputs (all 3 actuator outputs, blower motor output and
compressor request signal) should respond to the panel request.
6) CAN communication should be normal.
Fault Detection Condition
•
If Battery(supply) voltage goes below 7V
Normal Operating
Condition
FATC shall work normally in the operating voltage range of: 9V to 16V
(Tolerance ± 0.2V).
Probable Trouble Area
Discharged Battery
Fuse blown (3 amp)
Battery cable terminal (corroded/Sulphation/Loose) High resistance
within the supply cable.
FATC power connector loose etc.
Healing Condition
Check battery voltage and provide the 9V to 16V voltage
Component Details:
N/A
Preliminary Checks:
1.
Voltage at the battery terminals should be greater than 9V at the Ignition ON Condition.
2.
FATC power supply connector should have greater than 9V for normal functionality of FATC.
3.
Check battery cable and FATC connector terminals for damage.
4.
Check FATC ECU for pin bend/damage.