DTC P0340, P0342, P0343; Camshaft Position Sensor Circuit Malfunction [12/2012 - ]: Description
The camshaft position sensor for the intake camshaft (VV1 signal) consists of a magnet and MRE (Magneto Resistance Element).
The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM. Then the ECM uses this data to control fuel injection and injection timing.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P0340 | Camshaft Position Sensor Circuit Malfunction | When one of the following conditions is met:
|
|
Comes on | DTC stored | DTC for Mexico Models - Applies |
| P0342 | Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor) | The output voltage of the camshaft position sensor is below 0.3 V for 4 seconds (1 trip detection logic). |
|
Comes on | DTC stored | DTC for Mexico Models - Applies |
| P0343 | Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor) | The output voltage is higher than 4.7 V for 4 seconds (1 trip detection logic). |
|
Comes on | DTC stored | DTC for Mexico Models - Applies |
- Reference: Inspection using an oscilloscope.
HINT:
- The correct waveform is as shown.
- VV1 stands for the camshaft position sensor signal (for intake camshaft), and EV1 stands for the camshaft position sensor signal (for exhaust camshaft).
ECM Terminal Name CH1: Between VV1+ and VV1-
CH2: Between EV1+ and EV1-Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling