90sickfox

Wasn't a pretty sight...and I've got big hands
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The plan is to get rid of the battery, windshield washer bottle, and moroso overflow. To do that I need to get some stuff to relocate the battery and source a 82 mustang windshield washer / overflow box that fits where the battery resides now.

Screenshot_20201213-163539_Chrome.jpg


The reservoir for the electronic P/S should install neatly between the new box and the coil / strut tower.

Right now I'm focused on getting Dusty back on the ground. Decided to go with BBRC fuel rails with aeromotive regulator and 3/8 hard feed and 5/16 return lines. Still coilovers for the rear but eyeballing Kenny Brown lower IRS arms and his coil overs....

I'm anxious as hell. Son comes home from AIT next week before heading to South Korea. Working with a one hand handicap.

Someone asked me if my cup was half empty or half full ? I replied, I've got a cup'n sumtin's in it...and it's refillable. Lmao.

Happy Holidays folks !!!
 
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90sickfox

Wasn't a pretty sight...and I've got big hands
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yes sir, and a filter adapter if you come across one but its low priority. I want to do the electric PS at some point

There were a couple volvos out there with units in them. Someone has been taking them though. Atleast 4 were missing. They just ripped the bumpers back and cut the brackets. There was another one that had the remote reservoir but someone opened the cap and water is in it. I'll keep my eyes open for another one for sure.
 

90sickfox

Wasn't a pretty sight...and I've got big hands
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I checked the schematics on the pump at work. ( 2004 Volvo s40 2.4L ) Apparently, there's a speed sensor built into the pump. At idle it should spin around 2500rpm...at load it should be at around 6500rpm. The three wires must be a speed signal input...and I'd guess a data out. The issue is there is no schematic actually showing what wires do what. The gray wire is what people put 12v to and it sounds like that's full on all the time.

If I can find the speed output I would think I could find a way for my mspnp2 to control the pulse width for pump speed. I believe there is also a steering signal input to tell it when you are turning the wheels.

The issue is that neither of them look like CAN BUS wires. There are trouble codes set for the PS module so it must communicate out through one of the three lines. Or, it's all based on motor speed.

If I could find what wires do exactly what I could crack this code and get factory like power steering. The signal for steering could be as simple as a tooth on the column that rides inside a ring with the top open. Steering straight and the pump is idle...turn the wheel and the tooth contacts the ring and pump goes full on. MS may also be able to use vehicle speed + steering action = PS motor speed.

I need to find a way to check for the motor speed output. Then I can test whether pulsing the 12v gray wire changes motor speed. My tko600 already has an electronic speed sensor and harness that's just dangling on the trans. Gotta find a good way to put it to use.

What do you think @a91what ?

I think I'm going to destroy one out in the JY for the name of science. Hopefully, the one full of water is still there when I get back out.
 
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a91what

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I think this is feasible with MS3 but ms2 is just not flexible enough to do so. I will have to find a schematic for the pump wiring to see how it works.
 

90sickfox

Wasn't a pretty sight...and I've got big hands
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@a91what

Screenshot_20201216-094210_Drive.jpg


There is CAN BUS high and low on the other two wires. Seems like in order to get to the motor speed sensor I'll have to take one apart. There is a notation of a motor speed sensor and detection in the diag flow chart...however, the speed of the motor could be picked up through the actual motor itself. There is a formula for using the sine wave and calculating rpm. In this particular situation the module inside the assembly probably calculates and varies the voltage to the motor leaving no outside way to do it. The 12v trigger wire is probably going to an internal relay so varying voltage or pulsing may not work. I've got to get inside one of these.
 

a91what

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It looks to me like the unit has its own module inside that receives the can signal and then will pwm the solid state relay. unless we can debug the can circuit and figure out what address it is and what its looking for.... IMO alot of work and will require a second module to communicate with it, an arduino can be used but you would have to write your own code for it AND get it talking with the MS at the same time for some type of load feedback.

NOT worth the hassle IMO. :chin

let that bish run as is :nice:
 
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90sickfox

Wasn't a pretty sight...and I've got big hands
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It looks to me like the unit has its own module inside that receives the can signal and then will pwm the solid state relay. unless we can debug the can circuit and figure out what address it is and what its looking for.... IMO alot of work and will require a second module to communicate with it, an arduino can be used but you would have to write your own code for it AND get it talking with the MS at the same time for some type of load feedback.

NOT worth the hassle IMO. :chin

let that bish run as is :nice:

Or gut the module out and let MS pulse width the solid state relay. No need for can or the module. No second module...no codes to crack. Easy peasy...I just need to see inside one.
 

90sickfox

Wasn't a pretty sight...and I've got big hands
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This is the only picture of the inside of a volvo eps that I could find....

Screenshot_20201217-142530_Chrome.jpg


This tells me 2 things...

1. That there is stuff in there that may be able to be tapped into to bypass the current module function.

2. That these things can function as small boat anchors.

I guess we will find out when I can get back to the JY.

I've been reading a bunch of forums and info about these s40 pumps. Apperently, the delay in start up ( 2.5 seconds) is for the module to go into limp mode. This mode sets the PS pump at 75٪ output...about the sensitivity of 40 mph driving. No one has cracked the CAN code but it is in the works as of Aug. of this year....then that forum thread dried up.

My theory is that if the module can do it then an outside thing could do it too. Brushless motors have variable rpm controllers all over the interwebs. All the ones I found are 3 phase and these motors are reported as 4 phase motors. They use PWM to vary the speed. If I can disect the circuit board ( I'm no electronics guru...but a few here are ) then I could figure out how this particular 1 is controlled and how the relay is powered. Those two things will give me control.

I need to upgrade to MS3. I don't think my PNP2 will be able to calculate speed and control PWM based on that info.

Wish I knew how to build an Arduino to read the speed signal from my tko and send out a pwm based off of that. Then it could be a stand alone system and wouldn't need another controller. Great idea, @a91what.
 
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90sickfox

Wasn't a pretty sight...and I've got big hands
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That pic was a random
Did they salvage that unit from the Titanic?

It would be cool if you can reverse engineer the control to just get to the SSR. You'd be golden.

That pic was random from the interwebs. That thing is all kinds of screwed up. As soon as I can I'm going to the yard. Will take it apart and get detailed pictures out there. This way I don't have to pay for something that won't get used.
 
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