2 Attachment(s)
Hello -
I think I have a solution for steady-state cruise control. Here is the wiring diagram : Attachment 789 Here is how you use it : 1 - Put switch in position that allows for normal cruise control operation. I think this is in the position where "load" and "power" are connected. 2 - Use cruise control as normal to establish desired cruising speed on the flat. 3 - Flip switch. Once you flip the switch, the cruise control will stay steady on the flat, and will lose speed going uphill, which is what we want. All of the other CC safety features are present. If I hit the brakes, the CC releases. Once I have released, I need to flip the switch back to set the CC as normal. Bonus Feature : I used a lighted switch. Since the WOT/IDLE input operates on 12 volt "pulses", I can see the ECU/PCM send signals to the CC Module. On the lighted switch, it looks like morse code. The funny thing is, I can see the ECU/PCM get upset at the CC module. When I am going uphill, it starts flashing signals to the CC module. Eventually, the light on the switch just stays on because the CC module is not responding. Question : In the above situation, the ScanGauge shows a TPS setting of 0 even though the accelerator pedal is being held in place. Does this make sense? I think this is an symptom of the ECU/PCM being upset with the CC module. Requirements : lighted switch and gauge of wiring rated at 12 volts / 5 Amps. I chose 5 amps because that is what the fuse for the CC is rated at. CarloSW2 |
Whoops -
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Oh well, I think I'll stop here for now. I like it anyway because now I can "see" what the ECU/PCM is saying to the CC module. Very Star Trekky. CarloSW2 |
Hello -
I recently lost my CC due to my 5th gear swap, so my hacking priorities have changed. I would like to restore my CC funcitonality. Here is something interesting I read over at saturnfans.com : Start engine w/o clutch https://www.saturnfans.com/forums/showthread.php?t=65142 Quote:
If this works, I will get my CC back. Segway : Notice from the post that *if* you had a super-beefy-macho-tough-guy starter to go with a similar battery configuration, you might have the parts needed to create an "auto-start-and-go" from engine-off at a stop. CarloSW2 |
Dang, you were gonna scope that clutch out signal (lt blue) :) Does cruise still work in 4th? If so I still hold out hope that you can interrupt/"fake out" the clutch out signal that the pcm sends to the cruise module (because it now thinks the clutch is slipping with the new 5th gear not matching the expected vehicle speed).
If you could, stick a pin in that wire and hook up a volt meter connected to it and ground via some alligator jumpers and note the voltage when cruise is working and again when the clutch is in. |
skewbe -
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CarloSW2 |
skewbe -
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https://www.saturnfans.com/forums/sho...4&postcount=23 I may see if I can do it anyway, since it seems like an easy mod. CarloSW2 |
You do not have a switch at the top of the clutch pedal travel though.
The pcm generates that signal in newer saturns AFAICT, that is why I want to know what a valid signal looks like so we can fake it out. Sitck a pin in that lt blu wire for me and measure the voltage to ground with cruise working and again with the clutch in please. |
Any update on this one guys?
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Dust -
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CarloSW2 |
I would buy you dinner, and I am sure that alot of other saturn owners would love to know how to get the 5th gear swap to work with cruise.
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