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: 622 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. 2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with respect to earlier issue closure. 3. Camshaft sensor signal / supply / ground pins shorted to Supply or Ground. 4. Loose/ Damaged Connections between Cam shaft Sensor and EMS ECU. 5. Check for damage / back out of pins at ECU connector. 6. Check for damage / back out of pins at camshaft sensor’s connector. 7. Check whether the air gap between the magnets and sensing element of Cam sensor and Crank sensor are as per specification. If not, change mounting to align the air gap as per the specification. Trouble Shooting: Step Checks IF YES IF NO 1 Is there wiring harness electrical continuity between ECU pin A037 & Cam Shaft sensor pin 3, ECU pin A052 and Cam shaft sensor pin 2, ECU pin A051 and Cam shaft sensor pin 1. Go to next step Rectify the wiring harness connections as per the circuit schematic. 2 Check whether the ECM pins A037, A052, A051 are either short circuited to Battery Supply / Ground Request Driver on not to over-speed vehicle Go to next step 3 Check whether the cam shaft sensor is damaged Call hotline Go to Next Step 4 Check whether the Camshaft is damaged Replace camshaft Go to next step 5 Check whether the Crankshaft is damaged Replace crankshaft Go to next step 6 Are there any pins backed out from the Cam shaft sensor Connector Rectify/Replace Connectors Go to Next Step 7 Are there any pins backed out from the EMS ECU Connector Rectify/Replace Connectors Go to Next Step 8 Is there wiring harness electrical continuity between ECU pin A020 & Crank Shaft sensor pin 1, ECU pin A021 and Crank shaft sensor pin 2. Go to next step Rectify the wiring harness connections as per the circuit schematic. 9 Check whether the ECM pins A020 or A021 are either short circuited to Battery / Ground / Open circuited. Rectify the wiring harness connections as per the schematic Go to Next Step 10 Check whether the air gap between the magnets and sensing element of Cam sensor and Crank sensor are as per specification. Go to next step If not, change mounting to align the air gap as per the specification. 11 Check for Misaligned timing chain Rectify the same Go to Next Step 12 Check for Damaged crankshaft timing teeth Rectify the same Go to Next Step 13 Check for Damaged camshaft timing sprocket Rectify the same Go to Next Step 14 Check whether Crankshaft position sensor is defective Rectify the same Go to Next Step 15 Fault Persists. Call Hotline Repeat the above steps for reconfirmation 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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