Vehicle Platform: All ECU Name: Telematics Control Unit (TCU) DTC Troubleshooting Data Version: 1.12 Date: 02-06-2022 Author: TCM COC Page: 16 of 150 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. U3006 - 16:- Control Module Input Power "A" - circuit voltage below threshold Overview: ISO Code U3006 – 16 Control Module Input Power "A" - circuit voltage below threshold Customer Symptom Telematics ECU features will not be working Fault Effects (On Vehicle) Remote , Vehicle security, Alerts and other telematics features will not be working Fault Detection Condition DTC is set in case of control module circuit voltage is below 9V Normal Operating Condition TCU ECU communicates properly with other partner ECU’s in voltage range between 9V to16V Probable Trouble Area Battery terminal short/open/ground Battery Fault Battery circuit poor electrical connection Faulty TCU TCU connector damage (Oxidation, bending) Vehicle Battery Voltage below threshold of 9V Healing Condition 1. Verify DTC ageing-Clear in case of ageing 2. Check the harness connector-Replace the harness in case of faulty harness 3. Check TCU connector in general, connect firmly in case of loose-Replace TCU in case of connector damage 4. Verify the voltage in the TCU connector and correct the harness in case of low voltage reading compared to battery reading at the terminal 5. Check pins 3,11,12,15,27 of the TCU main connector- Replace TCU in case of connector damage 6. Read the battery voltage ,if voltage less than 9V then check for open circuit or short to ground for battery terminals 7. If problem persists after above steps (from 1 to 6) then replace the vehicle battery. 8. Replace TCU in case of internal hardware error
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