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: 138 of 202 U3006-17:- Control Module Input Power “A” – Circuit Voltage above Threshold Overview: This fault will come if Input Power "A" is more than threshold voltage. (In ignition on & engine running condition). Input Power "A" - is the Voltage Supply from battery. ISO Code U3006 - 17 Customer Symptom FATC (LED etc.) goes OFF Fault Effects (On Vehicle) FATC will be OFF Lamp Status (If Any) 1) The ECU should turn OFF all outputs and control module input power "A" circuit voltage above 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 above 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 above 16V 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.
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