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: 533 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. P2015-07: Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance: Variable swirl actuator HW damage Overview: DTC Description (User Friendly) Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance: Variable swirl actuator HW damage ECU Pin Number A005, AO29, A028 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) The frequency from "range 2" is detected. The received frequency must be between the two thresholds 13.6 KHz and 16.69 KHz. Normal Operating Condition Proper wiring harness connections between Variable swirl actuatorand EMS ECU. Probable Trouble Area Wiring Harness connections between Variable swirl actuator and EMS ECU. Healing Condition Rectify the error Clear through diagnostic tool. Ignition OFF & ON. Component Details: Swirl actuator is small butterfly valves fitted to the intake manifold just before the cylinder head intake ports. In a typical implementation it will be closed at idle speed, creating additional turbulence in the intake. As engine speed increases, the flaps are gradually opened until, at around 2,000 rpm, they are parallel to the airflow and present virtually no resistance. Their purpose is to ensure that the air entering the cylinder is sufficiently turbulent for good fuel-air mixing even at low engine speeds. 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 / Variable swirl actuator. 4. Check for any back out of pins at EMS ECU connector / Variable swirl actuator. 5. Check for any damage of pins at EMS ECU connector / Variable swirl actuator
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