Join Date: Oct 2012
Location: morrisville, vermont
cam sensor troubleshooting
i have an active code P0340 for the cam sensor.
i replaced the sensor and i still dont have any rpm.
i checked the signal circuit at the ecm and its not showing any pulse so i replaced the cam connector and ran a new wire to the ecm for the cam signal. still no rpm. is my new cam sensor bad.
i started over with my circuit tests, heres what i got using the gm flow chart.
is voltage between 12v ref and low ref over 10v? yes 11v
is the voltage between signal and grnd 0v? it was .1v (close enough to say yes?) if its a no then it could be the ecm
is the signal at the ecm showing 45-55% duty cycle while cranking? no, 0 hz, 0 rpm, 0 duty pulse. but it shows 10v w the key on.
i really think my new cam sensor is bad. what do you guys think?
Jamie's Garage, med/heavy truck service, morrisville VT