When does the camshaft position sensor rise back to 12 volts?
It rises back to 12 volts when the pin leaves the sensor head. The Camshaft Position Sensor sends this signal to the PCM via the signal wire in the wiring harness (See Fig. 3).
How is the cam sensor connected to the PCM?
The GRN wire is the signal wire that transmits the camshaft position sensor signal to the PCM and is the one labeled with the letter B in the photo. Remember, the CMP sensor must remain connected to its engine wiring harness connector. Connect the black multimeter test lead to the battery negative (-) terminal.
How is the camshaft position sensor connected to the ECU?
The wiring harness should be routed away from the high-tension cable to prevent interference. This procedure will determine if the Camshaft Position Sensor is able to send signal to the ECU. This is done by measuring the voltage across the signal and ground wires of the sensor.
Which is the signal wire for the cam sensor?
Place the multimeter in Volts DC mode. Connect the red multimeter test lead to the green (GRN) wire of the 3-wire connector. The GRN wire is the signal wire that transmits the camshaft position sensor signal to the PCM and is the one labeled with the letter B in the photo.
How to test the camshaft position sensor diagnostic trouble?
To go into more detail: if the camshaft position sensor is working like it should, on your 4.3L (or 5.0L or 5.7) mini-van or pick up or SUV, your multimeter will register 0 Volts (which is the Off signal) and when the camshaft position sensor is activated, the multimeter will register 12 Volts DC (and this is the On signal).
Where is the cam sensor located in the distributor?
The camshaft position (CMP) sensor is a three wire Hall Effect type sensor that needs power and ground to produce a Signal. The cam sensor is located within the distributor assembly and as such, it’s rotated by the camshaft.
Where is the camshaft timing pin on a DTC p0340?
It is mounted at the end of the Intake Camshaft (See Fig. 2). When the Camshaft Timing pin comes close to the sensor head, the voltage at the signal wire drops to zero. It rises back to 12 volts when the pin leaves the sensor head. The Camshaft Position Sensor sends this signal to the PCM via the signal wire in the wiring harness (See Fig. 3).
How does the Camshaft Position Sensor ( CMP ) work?
Camshaft Position Sensor (CMP) The CMP sensor provides the camshaft position information, called the CMP signal, which is used by the Powertrain Control Module (PCM) for fuel synchronization. On 2 wire Sensor engines, the distributor stator or Camshaft Position (CMP) sensor is a single Hall effect magnetic switch.