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: 481 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. P0237-11: Turbocharger pressure sensor signal (circuit short to ground) Overview: DTC Description as per ISO standard Turbocharger pressure sensor signal - circuit short to ground ECU Pin Number A38,A61,A95,A96 Customer Symptom MIL ON Fault Effects (On Vehicle) Cruise Control shut off; Torque limitation Intake manifold pressure to default value Boost pressure shut off Regeneration by driver demand inhibition; Service regeneration inhibition Regeneration due to flow resistance is disabled; DPF regeneration interruption or prevention Lamp Status (If Any) MIL ON Fault Detection Condition (Root cause) Boost pressure sensor wiring harness Boost pressure sensor EMS ECU Normal Operating Condition No Fault Code Probable Trouble Area Boost pressure sensor 5V supply circuit short to supply. Boost pressure sensor signal short to supply. Boost pressure ground open circuit. Boost pressure temperature sensor short to supply Boost pressure sensor EMS ECU Healing Condition Clear through diagnostic tool Ignition OFF & ON Component Details: Boost pressure sensor consists of a silicon chip mounted inside a reference chamber. On one side of the chip is the Reference chamber and on the other side is the pressure to be measured. The electrical resistance of the chip varies with the variation of pressure. This change in resistance alters the voltage signal. ECM interprets the voltage signal as Pressure and any change in voltage signal change in pressure. Preliminary Checks: 1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If yes, go ahead with next steps. If not, check for other DTC’s presence. 2. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to earlier issue closure. 3. Inlet Air Circuit Clogging? 4. VGT Actuator faulty? 5. Turbo charger Faulty? 6. Loose/ Damaged Connections between Boost Pressure Sensor and EMS ECU. 7. Check for back out of pins at both Boost Pressure Sensor connector and ECU connector. 8. Check for damage of pins at both Boost Pressure sensor connector and ECU connector. 9. Atmospheric pressure sensor faulty?
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