3.
While inspecting signal waveform,check if there is missing teeth or lower signal than threshhold.
The Crankshaft Position Sensor (CKPS) is a hall effect type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft; there are 58 slots in the target wheel where one is longer than the others. When the slot in the wheel aligns with the sensor, the sensor voltage outputs low. When the metal (tooth) in the wheel aligns with the sensor, the sensor voltage outputs high. During one crankshaft rotation there are 58 rectangular signals and one longer signal. The ECM calculates engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing. Using the signal differences caused by the longer slot, the ECM identifies which cylinder is at top dead center.
The ECM sets DTC P0336 when the number of crankshaft teeth during one revolution is more than reference number.
Item | Detecting Condition | Possible cause |
Monitoring Strategy | ● Reference mark check | ● Open power line ● Open signal line ● Open ground line ● Short between signal and power line ● Faulty CKPS ● Faulty ECM |
Threshold value | ● Counter of failure in searching reference gap : > 25times | |
Enable Conditions | ● Vehicle speed : < 25km/h , > 1.0km/h ● Engine speed+50 : < Stationary reference speed | |
Diagnostic Time | ||
MIL on condition |
This figure shows the waveform measured at terminal 2 of CKPS.
In section ① there are 2 missing teeth which is used as reference point in judging TDC.
The section ② is one tooth interval of 60 teeth which has an angle of 6 degree.
While inspecting signal waveform,check if there is missing teeth or lower signal than threshhold.
This figure shows the waveform measured at terminal 2 of CKPS.
In section ① there are 2 missing teeth which is used as reference point in judging TDC.
The section ② is one tooth interval of 60 teeth which has an angle of 6 degree.
While inspecting signal waveform,check if there is missing teeth or lower signal than threshhold.
If the CKPS signal ON with scan tool,when cranking engine,CKPS works propelly.
In case there is no symptom and wrong data but DTC is shown
The problem may be intermittent so slightly shake the connector and harness vertically and horizontally to check if there is any data changes
If the data changes normally, the problem was intermittent so erase DTC and verify the same DTC reoccure.
Go to "Terminal and Connector inspection" procedure.
In case there is symptom and wrong data with DTC
Check open,short or connector’s connection for CKPS.
Check the deterioration of CKPS performance.
Go to "circuit inspection" procedure.
