Q501 4 Cylinder MT Application DTC Troubleshooting Data Version: 0.1 Date: 21-Sep-2018 Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta Checked By: Yogesh Jadhav Approved By: Satish Kumar P Page: 577 of 1052 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. P1047-11: Turbocharger/Supercharger Boost Control "A" Circuit Low : Variable geometry turbocharger output 2 signal Low Overview: DTC Description (User Friendly) Turbocharger/Supercharger Boost Control "A" Circuit Low : Variable geometry turbocharger output 2 signal Low ECU Pin Number A039, A077, A076, A003, A025 Customer Symptom MIL ON, CEL OFF Fault Effects (On Vehicle) - Lamp Status (If Any) MIL ON. MIL Turns Off as and when fault condition is not present / healed. Fault Detection Condition (Root cause) This fault gets logged if the VGT valve control pin A025 of EMS ECU is short circuited to ground on out2. Normal Operating Condition Healthy wiring harness connections between EMS ECU and VGT Valve. Probable Trouble Area Wiring Harness connections between EMS ECU & VGT valve Healing Condition Rectify the error Clear through diagnostic tool. Ignition OFF & ON Component Details: The turbo charger position sensor is used in a pneumatic actuator to precisely detect the actual position of the variable turbo geometry mechanism. This leads to improved performance and reduces the fuel consumption. A turbocharger is a turbine-driven forced induction device that increases an internal combustion engine's efficiency and power output by forcing extra air into the combustion chamber. Preliminary Checks: 1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above Table. If yes, go ahead with next steps. If not, check for other DTC’s presence. 2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with respect to earlier issue closure. 3. Check for Damage in EMS ECU connector / VGT Actuator and VGT position sensor. 4. Check for any back out of pins at EMS ECU connector / VGT Actuator and VGT position sensor. 5. Check for any damage of pins at EMS ECU connector / VGT Actuator and VGT position sensor.
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