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: 66 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. P0236-61: Negative boost pressure governor deviation (low pressure, signal calculation failure) Overview: DTC Description as per ISO standard Negative boost pressure governor deviation – Signal calculation failure. ECU Pin Number A38, A96, A95, A61 Customer Symptom MIL ON Fault Effects (On Vehicle) - Lamp Status (If Any) MIL ON Fault Detection Condition (Root cause) Ignition ON and Engine On. Normal Operating Condition No Fault Code Probable Trouble Area 1. Clogged air filter 2. Intake air restriction 3. Intake air leak 4. Exhaust system leak 5. EGR system leak 6. Vacuume hose and tubes 7. Boost pressure actuator 8. Turbocharger Healing Condition Write IMA code. Clear through diagnostic tool Ignition OFF & ON Component Details: A Variable Turbine Geometry turbocharger is also known as a variable geometry turbocharger (VGT), or a Variable Nozzle Turbine (VNT). A turbocharger equipped with Variable Turbine Geometry has little movable vanes which can direct exhaust flow onto the turbine blades. The vane angles are adjusted via an actuator. The angle of the vanes varies throughout the engine RPM range to optimize turbine behaviour. Preliminary Checks: 1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If yes, 2. go ahead with next steps. If not, check for other DTC’s presence. 3. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to earlier issue closure. 4. Check for damage of Hoses / pipes connected in the Inlet air circuit (Intercooler, Turbo charger) 5. Check for clogging of Air filter / Inlet air circuit. Trouble Shooting:
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