Hyundai Elantra (CN7): Engine Control System / Knock Sensor (KS)
Description and operation
Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage.
Knock Sensor (KS) is installed on the cylinder block and senses engine knocking. When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. At this time, this sensor transfers the voltage signal higher than the specified value to the ECM and the ECM retards the ignition timing.
Specifications
Item
|
Specification
|
Capacitance (pF)
| 850 - 1150
|
Resistance (MΩ)
| R > 1
|
Schematic diagrams
Harness Connector
Repair procedures
| 1. | Turn ignition switch OFF and disconnect the battery negative (-) terminal |
| 2. | Disconnect the knock sensor connector (A). 
|
| 3. | Remove the installation bolt (A), and then remove the sensor from the cylinder block. Tightening Torque : 18.6 - 24.5 N.m (1.9 - 2.5 kgf.m, 13.7 - 18.1 lb-ft) |
|
| •
| Install the component with the specified torques. |
| •
| Note that internal damage may occur when the component is dropped. In this case, use it after inspecting. |
|
| 1. | Install in the reverse order of removal. |
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.
Description and operation
DescriptionHeated Oxygen Sensor (HO2S) consists of the zirconium and the alumina and is installed on upstream and downstream of the Manifold Catalyst Converter (MCC).
Other information:
DescriptionThe immobilizer system will disable the vehicle unless the proper ignition key is used, in addition to the currently available anti-theft systems such as car alarms, the immobilizer system aims to drastically reduce the rate of auto theft.1.
Components and components location
Component Location1. Heater control unitComponents[Connector A]
Pin No
Function
Pin No
Function
1Mode control actuator (Feedback)21Mode control actuator (Vent)2Intake actuator (Feedback)22Mode control actu
