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 ECM and the ECM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.
The ECM monitors the 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 ECM sets DTC P0340.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check camshaft signal switching | ● Open or short in signal, ground or power supply circuit ● Contact resistance in connectors ● Misadjust crankshaft and camshaft pulley position ● Faulty CMP sensor |
EnableConditions | ● No Crankshaft Position Sensor signal error | |
Threshold Value | ● No signal switching | |
Diagnostic Time | ● 80 revolutions |
