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: 621 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. P0016-62: Crankshaft position – Camshaft position correlation – Offset between camshaft and crankshaft (signal compare failure) Overview: DTC Description (User Friendly) Offset between camshaft and crankshaft (signal compare failure) ECU Pin Number A037, A052, A051; A020, A021 Customer Symptom Possible no start condition. Engine noise. Fault Effects (On Vehicle) DPF regeneration Off, Reduced Torque Mode activated. Lamp Status (If Any) MIL OFF, CEL OFF, DPF lamp ON Fault Detection Condition (Root cause) Distortion detection is active when the engine is in cranking or running. Camshaft offset angle exceeded. Normal Operating Condition No Fault Probable Trouble Area Erratic camshaft position sensor signal Erratic crankshaft position sensor signal Misaligned timing chain Damaged crankshaft timing teeth Damaged camshaft timing sprocket Camshaft position sensor Crankshaft position sensor EMS ECU faulty Healing Condition Rectify the error Clear through diagnostic tool Ignition OFF & ON Component Details: Camshaft Position Sensor: 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. Crankshaft Position Sensor: This is fitted on the crankcase and faces the phonic wheel on the flywheel. It is inductive type, i.e. its operation is determined by magnetic field changes generated by the teeth passing in front of the phonic wheel. The changeover from full to empty determined by the presence or absence of a gap brings about a magnetic flux change sufficient to generate an induced alternating voltage proportional to the number of teeth on the ring (or phonic wheel). The frequency and amplitude of the voltage send to the electronic control unit provides the latter with an indication of the engine angular speed. The sensor output signal approximates a sine wave whose frequency is proportional to engine speed and amplitude is approximately proportional to engine speed. Active edge is generated from zero crossing point positive to negative transition. 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.
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