The Camshaft Position Sensor (CMPS) is a sensor that detects the compression TDC of the NO. 1 cylinder. The CMPS consists of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V. If not, the sensor voltage is 0V. These CMPS signal is sent to the PCM and the PCM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.
The PCM monitors the inlet camshaft sensor signal transition position which must change only once per crankshaft revolution. If no camshaft signal is detected while crankshaft signal is detected, the PCM sets DTC P0340.
Item
Detecting Condition
Possible Cause
DTC
Strategy
Case1
Missing signal check
Open or short in signal, ground or power supply circuit
Poor connection or damaged harness
Misadjust crankshaft and camshaft pulley position
Faulty CMPS #1
Case2
Noisy signal check
Enable Conditions
Engine synchronized
Threshold
Value
No camshaft edge detected within one revolution
Camshaft segment duration < 7.3ms
Camshaft segment duration gradient not valid
Diagnostic
Time
8 rev.
5 rev.
MIL On Condition
2 Drive Cycles
? There are 60 signals of CKPS(Including missing tooth) during the semi-cycle of CMPS #1.
? There are 3~5 signals of CKPS between the switching point of CMPS #1 and the missing tooth of CKPS.