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Here is a shot of the waveform for both Intake CKP actuator (red trace) and the Intake CMP actuator (blue trace). At idle, Intake CMP actuator0( blue trace) show some obvious dipping in voltage as compared to the Intake CKP (red trace) actuator. Are these dips enough evidence to show an intermittent solenoid failure for the intake CMP actuactor?
Correct me if i'm wrong but aren't actuators, computer outputs? The signals you captured are coming from the computer so any abnormalities there would be originating from the computer.
There are position actuators (outputs) and position sensors (inputs) and I would scope the position sensor signal to make sure it matches the pulse width command from the computer.
there are two wires from each solenoid, one is ground and the other is control. using DVOM, intake CMP solenoid showed control wire read 5.5V (im thinking bias voltage) and 0V for ground, both plugged; ohm test showed the CMP solenoid read 20.4 ohms as compared to the good solenoid of 10.4 ohms. replaced both solenoids.
yes they are, from my standpoint. these was taken after replacing both solenoids. the absence of intermittent dips from the intake CMP solenoid is noticiably absent, plus the regularity in the highs and lows and frequency are same all through out, unlike in the early waveform posted. i also checked V esp from the CMP solenoid that earlier read 5.5V plugged in and 5.4 unplugged in control wire; now, both control and ground read 0V plugged (thus powerside) in.
Im hoping Tyler and the rest would comment...thank you.
hi tyler...no, the dip i saw was before replacing the intake camshaft solenoid. i did my wiring integrity test prior and initially meter reading on control read about 4.7 v and almist same reading on ground. checked meter n grounding and did another test. meter read 0V on ground this time n control read 5.5 V. compared with good cmpshaft on echaust side and saw both 0v plugged in, confirming powerside. so to make something not right on intake side, i scoped it and waveform saw intermittent dips. i got convince that wiring integrity good and solenoid bad. i advised owner to change both solenoid. SUV working well now...
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Work has been super busy with my own Equinox/Terrain problems.