2002 Grand Am Gt 3.4 v6 camshaft position sensor

[Parkeene1]

Should there be voltage on the signal wire if you unplug the sensor, turn the key on (Not start) and measure with a volt meter the voltage of the signal wire from the harness side of the connector (hot test lead) and ground terminal on the battery (neg. Test lead)?

Should it be 12v, 5v, or 0v?

What if you measure from the same place on the signal wire with (hot lead) and ground wire in the harness (neg. Lead)?

I'm trying to rule out it being my circuit. Whether it be the ECU or just a fault in the signal wire. I'm getting good 12v feed and good ground. I've tested contanuity of the signal wire from the harness as far back against the firewall as I can.

Anybody also know how to test contanuity of the signal wire all the way back to the ECU? I have no idea which pin that would be.

Thanks for any help!!! First time post!! Great site. Has help already answer a few things for me.

 

[melsg5]

Here is a test procedure

How To Test The Cam Sensor (P0341) (GM 3.1L, 3.4L)

How to test a BAD Camshaft Position (CMP) Sensor on GM 3.1L and 3.4L cars and mini-vans (Chevy, Buick, Olds, Pontiac). Troubleshooting Trouble Code: P0341 (OBD II) or Code 17 (OBD 1) with a Multimeter. Testing P0341: CMP Sensor Circuit Performance. Testing The Cam (CMP) Sensor.

troubleshootmyvehicle.com

 

[Parkeene1]

Here is a test procedure

How To Test The Cam Sensor (P0341) (GM 3.1L, 3.4L)

How to test a BAD Camshaft Position (CMP) Sensor on GM 3.1L and 3.4L cars and mini-vans (Chevy, Buick, Olds, Pontiac). Troubleshooting Trouble Code: P0341 (OBD II) or Code 17 (OBD 1) with a Multimeter. Testing P0341: CMP Sensor Circuit Performance. Testing The Cam (CMP) Sensor.

troubleshootmyvehicle.com

I tried those things but it never was clear about the exact question I asked. I can't turn the crank by hand. Theres to much compression. I need to know if there should be voltage on the signal wire while unplugged and key turned on so I can decide if it's my circuit or the sensor. I can find anything that says. I don't wanna have to brace the motor take out the power steering pump and put it all back together just to find out it's the circuit. I'm basically trouble shooting the circuit not the sensor

 

[melsg5]

Why cannt you turn it by hand with the plugs removed? It seems pretty clear what and when you will get a voltage reading.

If the CMP sensor is working correctly, the multimeter will register an ON/OFF voltage of 9.5 to 10 Volts DC once every two revolutions of the crankshaft. OFF is when the multimeter displays 9.5 to 10 Volts DC and ON is 0 Volts DC.

To be a little more specific: Your multimeter will register 9 to 10 Volts most of the time you're turning the crank pulley. When the camshaft position sensor is activated (and if it's working correctly) by the pole piece on the camshaft, then this voltage will go down to 0 Volts.

Remember, the multimeter will only register the 0 Volts only once per two complete turns of the crankshaft pulley.