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: 690 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. 5. Check inlet air circuit for clogging; wrong assembly/fitment / leakages etc; clean the inlet air circuit and remove any clogging and remove leakage paths. 6. Check for any leakages in EGR system airflow path. Rectify if any leakages found. Trouble Shooting: Step Checks IF YES IF NO 1. Check for any other faults presence related to ECU Internal power supplies. Follow rectification process for the faults, before proceeding further Go to Step 2 2. Check for electrical continuity between ECU to AMF connector as per circuit schematic Go to Step 3 Establish continuity by rectifying harness connections as per the circuit schematic 3. Are there any pins damaged at EMS ECU Connector or AMF Sensor connector? Replace the connector or wiring harness Go to step 4 4 Are there any pins backed out from the EMS ECU Connector or AMF sensor connector? Rectify/Replace Connectors Go to Step 5 5 Check inlet air circuit for clogging and leakages in air path; wrong assembly/fitment etc; Any issues found? Clean the inlet air circuit and remove any clogging. Rectify the leakages Go to Step 6 6 Check whether the EMS ECU pin number K086 and K076 are open circuited (MAF Sensor pin 3 and ECM pin K076 or MAF sensor pin 2 and K086) or K086 is short circuited to Battery or Short circuited to ground, Rectify the wiring harness. Go to Step 7 7 Check for High resistance / Open circuit in MAF sensor supply circuit (MAF Sensor pin 1 and Supply) Rectify the wiring harness. Go to Step 8 8 Check for High resistance / Open circuit in MAF sensor ground circuit (MAF sensor pin 2 and ECM pin K087) Rectify the wiring harness. Go to Step 9 9 Fault Persists Replace AMF / MAF Sensor*1. If Fault persists then Call Hot line. Follow the steps again for reconfirmation Note *1: In case of AMF Sensor Replacement. Below Routine to be executed “Reset Lambda sensor - 4.2.2 ‘Exchange of Injectors, Rail Pressure Sensor and MAF Sensor’ (LSU1 $ 02 05 XX) – Sub-function 02“. DTC’s confirmation: After rectification, Test Drive the vehicle for 2 KM and ensure that no DTC’s are logged in ECM.
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