Hyundai i-30: Engine Control System / Crankshaft Position Sensor (CKPS)

Hyundai i30 (PD) 2018-2025 Service Manual / Engine Control / Fuel System / Engine Control System / Crankshaft Position Sensor (CKPS)

Description and operation

Description

Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the engine control system. If there is no CKPS signal input, the engine may stop because of CKPS signal missing.

This sensor is installed in ladder frame and generates alternating current by magnetic flux field which is made by the sensor and the target wheel when the engine rotates. The target wheel consists of 58 slots and 2 missing slots on 360 CA (Crank Angle).

Troubleshooting

Waveform

This example shows a typical Crankshaft Position Sensor (CKPS) and Camshaft Position Sensor (CMPS) waveform at idle. The PCM controls the injection and ignition timing by using these signals.

Generally CKPS signal is used to detect the piston's position and CMPS signal is used to detect the Top Dead Center of each cylinder.

Schematic diagrams

Circuit Diagram

Harness Connector

Repair procedures

Inspection

Check signal waveform of CKPS and CMPS using a diagnostic tool.

Specification : Refer to "Waveform"

Removal

1.	Turn the ignition switch OFF, and then disconnect the battery negative (-) terminal.

2.	Remove the battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the crankshaft position sensor connecctor (A).

Remove the sensor after loosening the mounting bolt (A).

Tightening Torque :

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

Installation

•	Install the component with the specified torques.

•	Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

•	Apply the engine oil to the O-ring.

•	Insert the sensor in the installation hole and be careful not to damage.

1.	Install in the reverse order of removal.

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