Honda shift solenoid pintle hump

Should all shift solenoids have a pintle hump when turning on and when turning off?

I am checking the shift solenoids on a 2002 crv and I don't see a pintle hump when any of the shift solenoids turn on. But I see a good pintle hump when the shift solenoids turn off.

The vehicle shifts fine except on the 3 - 2 downshift. There is a delay before 2nd gear engages.

I don't see a pintle hump when any of the shift solenoids turn on

Are you looking at the Current waveform?

Yes. I will get a screen shot today. I should not have said all shift solenoids. I've only checked shift solenoid b and c. Neither one had a pintle hump when turning on. Solenoid C had a hump when turning off. I have not checked B turning off.

Here are some screen shots.

Shift solenoid C turning on:



Shift solenoid C turning off:



Shift solenoid B turning on:



Shift solenoid B turning off:



These are the only shift solenoids I've looked at. I thought there should be a pintle hump when they turn on and when they turn off. But I guess this is not always the case.

Are those all CURRENT waveforms? Pintle closing is, generally, viewed in a VOLTAGE waveform, taken from the control side of the circuit.
Here is a video of ScannerDanner explaining injector waveforms. The principle is exactly the same for solenoids, although it is harder to see the pintle/poppet movement. This video shows how circuit design can affect the waveform.


ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700000062.pdf

I haven't looked at the voltage waveform.

I found this:

www.atraonline.com/gears/2006/2006-09/2006_09_22.pdf

It shows two current waveforms of a 5r55e shift solenoid. It has a pintle hump when it turns on and when it turns off.

I thought there might be a reason some shift solenoids don't have the energizing pintle hump.