Hyundai Elantra: Engine Control System / Camshaft Position Sensor (CMPS)
Description and operation
Camshaft 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.
The CMPS is installed on engine head cover and uses a target wheel installed on the camshaft. The Cam Position sensor is a hall-effect type sensor. As the target wheel passes the Hall sensor, the magnetic field changes in the sensor. The sensor then switches a signal which creates a square wave.
[Bank 1 / Intake]

[Bank 1 / Exhaust]

Schematic diagrams

Harness Connector
CMPS [Bank 1 / Intake]

CMPS [Bank 1 / Exhaust]

Repair procedures
1. | Check signal waveform of CKPS and CMPS using a diagnostic tool. Specification : Refer to "DTC Diagnosis Guide" |
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| DON’T remove the camshaft position sensor during engine running or right after engine stops, or a scald by the flowed out engine oil may occur. |
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[Bank 1 / Intake]
1. | Turn ignition switch OFF and disconnect the battery negative (-) terminal. |
2. | Disconnect the camshaft position sensor connector (A). |
3. | Remove the installation bolt, and then remove the sensor (B). Tightening Torque : 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft) |

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[Bank 1 / Exhaust]
1. | Turn ignition switch OFF and disconnect the battery negative (-) terminal. |
2. | Disconnect the camshaft position sensor connector (A). |
3. | Remove the installation bolt, and then remove the sensor (B). Tightening Torque : 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 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
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Description and operation
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Other information:
Function warning
Vehicle detection
To warn the driver a vehicle is
detected, the warning light on the
outside rearview mirror will illuminate.
The system will operate when your
vehicle speed is above 12 mph (20
km/h) and the speed of the vehicle in
the blind spot area is above 7 mph (10
km/h)...
Components and components location
Component Location [This illustration shows the LHD type. RHD type is symmetrical.]1. Main crash pad assembly
Repair procedures
Replacement
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When removing with a flat - tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components...