Kia Rio: Engine Control System / Crankshaft Position Sensor (CKPS)

Kia Rio 2017-2020 YB Service Manual / Engine Control / Fuel System / Engine Control System / Crankshaft Position Sensor (CKPS)

Specifications
Specification

Crankshaft Position Sensor (CKPS)

NON- ISG Type

Item
Specification
Type
Magnetic field sensitive type
Coil Resistance (Ω)
819 ~ 1001 [20°C (68°F)]
Pin
2

With ISG Type

Item
Specification
Type
Hall effect type
Air Gap (mm)
0.9 ~ 1.1
Pin
3

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). In case of ISG, the ISG function get reliable information about crank shaft position during all modes of operation. The CKPS in ISG function ensures short restarting time for engine and efficient combustion.

[ISG]

[NON - ISG]

Operation
[ISG]

Two separate differential channels for speed and direction information respectively.

Phase separation of the 2 channels delivers information on rotation direction.

Schematic diagrams
Circuit Diagram
with ISG

without ISG

Repair procedures
Inspection
1.

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

Specification : Refer to “Waveform”

Removal
1.

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

2.

Lift the vehicle.

3.

Disconnect the crankshaft position sensor connector (A).

4.

Remove the CKP sensor after removing the installation bolt (A).

Crankshaft position sensor installation bolt:

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.

Installation is reverse of removal.

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.

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