How to check CKP(Crankshaft Position Sensor) of Hyundai Terracan

How to check the CKP of Hyundai Terracan.

2006  D 2.9 TCI-J3  Engine  Engine Control  P0016 Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

 

Auto repiar and Study Guide Component Location

 

Auto repair and Study guide General Description

※ Cam shaft position sensor

Auto repair and Study guide, Cam Shaft Position Sensor(CMPS) is hall sensor type. Sensing the teeth attatch at the end of exhaust cam shaft, CMPS detects rotation of Cam shaft (1 signal per 1 lotation)

As Cam shaft rotates once while Crank shaft does twice, CMPS referrence point generates once while CKPS do twice.Study guide

As this signal inputted to ECM, it distinguishes crank angle and the cylinder which requires fuel injection in order to determine injection sequence and duration.Study guide

※ Crank shaft position sensor

Auto repair Crank Shaft Position Sensor(CKPS) is magnetic inductive type. Mounted on transaxle hausing, it senses tone wheel position of fly wheel.

As tone wheel is devided with 58 teeth and 2 missing teeth (referrence point), 1 tooth corresponds to 6 degree.

CKPS which calculates RPM and crank angle is important to determine fuel injection quantity and injection timing with APS. Crank shaft position is closely related to engine starting,Study guide.

Auto repair and Study guide DTC Description

P0016 is set when timing system error occurs. This code is due to 1) incorrect correlation between CKP reference point and CMP reference point, 2) The failure of reference point synchronization because of abnormal output signal from CKP or CMP 

DTC Detecting Condition

Detecting Contion
● Failure occurs at cranking : fuel injection stops(engine ON is impossible)
● Failure occurs at engine running : using cylinder data before failure happens. Engine running is possible only untill engine OFF.
Check lamp

Auto repair and Study guide Possible Cause
● CKPS and CMPS reference points not synchronized properly
● Poor timing belt arrangement
● CKPS circuit
● CKPS component
● CMPS circuit
● CMPS component
● Too wide air gap

 

Auto repair and Study guide Signal Waveform

※ CMPS Signal Waveform Analysis

1.ECM recognizes HIGH signal as LOW signal when CMPS signal drops below 2.0V and LOW signal as HIGH signal when CMPS signal rises above 3.8V.Study guide.

2.V0 - the Minimum voltage of LOW signal does not drop below 0.0V due to the hall sensor inside resistance. When the Minimum voltage of LOW signal is above 0.6V during signal waveform inspection, check excessive resistance inside of CMPS component or in ground circuit.Study guide.

※ CKPS Signal Waveform Analysis

1.The output voltage of CKPS signal varies according to rpm(the speed of tone wheel passing by sensor)

(low voltage is inducted for low speed and high voltage is inducted for high speed.)

2.Auto repair and Study guide, CKPS should detect from low rpm at cranking to above 5000rpm. If minimum detecting voltage is set low for the ease of signal detection at low rpm, 1) the abnormal signal at high rpm from which high voltage generates or 2) electrical NOise through circuit can be recognized as Crank signal. Thus minimum detecting voltages at low rpm and high rpm are set differently.

3Auto repair .ECM convert analog signal like the waveform illustrated above into digital signal with A/D converter.The voltage above minimum detecting voltage of crank signal and "-"voltage below 0.0V is meaningless at converting process. RPM is detected as Hz.(signal detecting period)

 

Study guide Monitor Scantool Data

1.Connect Scantool to Data Link Connector (DLC).

2.Warm engine up to normal operating temperature.

3.Turn "OFF" electrical devices and A/C.

4.Monitor "ENGINE SPEED" parameter on the Scantool.

A.Specification : 800±50RPM at idle

 

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