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: 805 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. Component Details: A typical Hall Effect Sensor has three wires or terminals: one for ground, one for supply or reference voltage and one for the output signal. To produce an output signal, a Hall Effect Sensor must be supplied with a reference voltage. When a Metal/wheel passes through the air gap between the magnetic field (Magnet) and silicon chip (CAM sensor), it blocks the Magnetic field and causes the chip’s output voltage to suddenly drop to zero else the chip's output voltage is 4.7 Volts. 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. 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 cam shaft sensor’s connector. 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 3 Are there any pins backed out from the Cam shaft sensor Connector Rectify/Replace Connectors Go to Next Step 4 Are there any pins backed out from the EMS ECU Connector Rectify/Replace Connectors Go to Next Step 5 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. Circuit Schematic:
RkJQdWJsaXNoZXIy MTIwNTUz