Hyundai Elantra (CN7): Engine Control System / Crankshaft Position Sensor (CKPS)
Description and operation
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, fuel is not supplied.That is, vehicle can't run without CKPS signal. This sensor is installed on the cylinder block or the transaxle housing and generates alternating current by magnetic flux field which is made by the sensor and the target wheel when engine runs.
The target wheel consists of 58 slots and 2 missing slots on 360 degrees CA (Crank Angle).
Schematic diagrams
Harness Connector
Repair procedures
| 1. | Check signal waveform of CKPS and CMPS using a diagnostic tool. Specification : Refer to "DTC Diagnosis Guide" |
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| 1. | Turn ignition switch OFF and disconnect the battery negative (-) terminal. |
| 2. | Remove the engine room under cover. (Refer to Engine and Transaxle Assembly - "Engine Room Under Cover") |
| 3. | Disconnect the crankshaft position sensor connector (A). |
| 4. | Remove the installation bolt (B), and then remove the crankshaft position sensor. Tightening Torque : 7.8 - 9.8 N.m (0.8 - 1.0 kgf.m, 5.8 - 7.2 lb-ft) |
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| Install the component with the specified torques. |
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| Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing. |
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| Apply the engine coolant to the O-ring. |
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| Insert the sensor in the installation hole and be careful not to damage. |
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| 1. | Install in the reverse order of removal. |
Description and operation
DescriptionThe Engine Coolant Temperature Sensor (ECTS) is located in the cylinder block and cylinder head, and measures the temperature of the engine coolant.
Description and operation
DescriptionCamshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element.It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of each cylinder which the CKPS can't detect.
Other information:
Repair procedures
RemovalMood lamp unit1.Disconnect the negative (-) battery terminal.2.Remove the main crash pad assembly.(Refer to Body - "Main Crash Pad Assembly")3.Loosen the mounting screws and remove the main crash pad air duct (A).4.Loosen the mounting screws and remove the mood lamp unit (A).
Trouble Symptom ChartsTrouble Symptom 1Trouble Symptom 2
Trouble symptom
Probable cause
Remedy
The set vehicle speed varies greatly upward or downward"Surging" (repeated alternating acceleration and deceleration) occurs after settingMalfunction of the vehicle speed se
