TIAGO AMT Gasoline DTC Troubleshooting Guide Version: 2.0 Date: 06-06-2016 Author: Sathi/Anupama Page: 310 of 424 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. 98. P1711-07: Battery Supply under low threshold Overview: ISO Code P1711-07 Customer Symptom Transmission Fault Lamp ON, No gearshifts, Vehicle not cranking, vehicle stuck in gear while driving Fault Effects (On Vehicle) No gearshifts, Vehicle not cranking, vehicle stuck in gear while driving Lamp Status (If Any) Transmission Fault Lamp ON Fault Detection Condition This fault gets detected after Ignition On when a gearshift is not in progress and a battery voltage is detected by TCU is below a healthy limit but still gearshifts are possible. Normal Operating Condition Battery voltage will normally be in healthy range for a charged battery Probable Trouble Area Wiring Harness Connections / TCU/ battery/ alternator Healing Condition Immediately after valid signal Component Details: There are 3 TCU power supplies 1 Ignition and 2 battery power for driving valves and the hydraulic pump.The Problem may occur due to an electrical problem or internal damage to TCU. Preliminary Checks: 1) Blown out TCU power fuses (2 X 30 Amp) 2) Battery voltage and state of charge. 3) Check for correct functioning of Alternator (Ref. EMS manual) 4) Loose Fitting TCU connectors. 5) Check for damage or back out of pins at TCU 28 Pin connector. 6) Check correct fitment of ground cable connections on vehicle chassis. CAUTION!! To Avoid Electrical damage to TCU/Kit components - In case of a blown out fuse, power supply, ignition and ground pins of the TCU and chassis ground should first be checked for any short/open circuits before replacing the fuse. Trouble Shooting:- Step Checks IF YES IF NO 1 Check Battery and Ignition supplies at pins 5, 1 and 3. Also check resistance between Battery terminals and TCU power and Ignition pins. Are resistances and continuities OK? Go to Step 2 rectify harness connections as per the circuit schematic 2 Is there any pin back out/damage/rust/oxidation observed on TCU 28 pin Connector? Clean or repair or replace connector Go to Step 3 3 Fault Still Persists? Replace TCU Follow the steps again for reconfirmation - the following points by referring TCU parameters using TML diagnostic tool before handing over to customer. Drive the vehicle through all gears in both Automatic and Manual modes Ensure no DTC is active and Transmission Fault Lamp is OFF. Circuit Schematic Diagram:
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