COMPONENT LOCATION
GENERAL DESCRIPTION
Cam Shaft Position Sensor(CMPS) is hall sensor type. Sensing the teeth attatch at the end of 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.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.
DTC DESCRIPTION
P0341 is set when CMPS reference point is detected more or less than twice while CKPS reference point is recognized 4 times. This code is due to temporary poor connection or short to ground in CMPS circuit. CMPS component failure.
DTC DETECTING CONDITION
Item | Detecting Condition | Possible Cause |
DTC Strategy | Signal monitoring(wrong camshaft signal)
| CMPS circuit CMPS component
|
Enable Conditions | During accelerating or cranking
|
Threshold Value | When RPM from CMPS correlates with RPM from CKPS abnormally. (wrong camshaft signal)
|
Diagnostic Time | Crank Shaft rotates 4 times
|
Fail Safe | Fuel cut | NO | |
EGR Off | NO |
Fuel Limit | YES |
Check Lamp | YES |
SCHEMATIC DIAGRAM
SIGNAL WAVEFORM AND DATA
? Signal Analysis
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.
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.
SPECIFICATION
Sensor Type | Output Signal Characteristic | Air Gab | Low RPM Minimum Detecting Voltage | High RPM Minimum Detecting Voltage |
Hall effect type | 0V~5V Digital signal output | 1.25mm | below 2.0V | above 3.8V |