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

Kia Picanto JA 2017-2022 Service & Repair Manual / Engine Control / Fuel System / Engine Control System / Crankshaft Position Sensor (CKPS)

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

ISG only
Item
Specification
Type
Hall effect type
Air Gap (mm)
0.5 - 1.5
Pin
3

Description and operation
Description
Crankshaft Position Sensor (CKPS) is one of the most important sensors of the engine control system that detects the crankshaft position. If there is no CKPS signal input, the engine may stop.
Installed in the ladder frame, this sensor generates alternating current by magnetic flux 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). For ISG type, the ISG function receives reliable information about crankshaft position during all modes of operation. The CKPS in ISG function ensures short restarting time for engine and efficient combustion.

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
[A/T]
[NON - ISG]

[ISG only]

[M/T]
[NON - ISG]

[ISG only]

Repair procedures
Inspection
1.
Check signal waveform of CKPS and CMPS using a KDS.
Specification: Refer to "Waveform"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Disconnect the crankshaft position sensor connector (A).

3.
Remove the engine room under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
4.
Remove the sensor (A) by loosening the mounting bolt.
Crankshaft position sensor mounting bolt:
9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

Installation
   
Tighten the component to the specified torques.
If the component has been dropped, inspect for damage before installation.
Apply engine oil to the O-ring.
Carefully insert the sensor into the installation hole without damaging it.
1.
Install in the reverse order of removal.
Troubleshooting
Waveform
[NON-ISG]

The above graph shows waveforms of a typical Crankshaft Position Sensor (CKPS) and a Camshaft Position Sensor (CMPS) at idle. The PCM controls the injection and ignition timing by using these signals.
Generally, CKPS signal is used to detect the piston position and CMPS signal is used to detect the Top Dead Center of each cylinder.
[ISG]

The above graph shows waveforms of a typical Crankshaft Position Sensor (CKPS) and a Camshaft Position Sensor (CMPS) at idle.
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