Volvo RWD 200 Forum
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SAVE Apples and Oranges 200 1984
posted by
lucid
on
Sun Jul 5 06:32 CST 2009
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last visit: Sat Nov 21 07:16 CST 2009[RELATED]Charles,
Those two items (131 and 132 in '84 240 diagram) do apply to 1984 240s, but only those with K-Jet FI. In the U.S. that would be the Turbo 240s thru 1985.
The device that Ken C refers to is an A/C "Idle Speed Increase" solenoid on the throttle body idle speed adjuster.
On early B21s the solenoid bypassed additional air when activated by voltage from the compressor clutch circuit.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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SAVE Not quite .... 200 1984
posted by Ken C on Mon Jul 6 18:18 CST 2009
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last visit: Wed Nov 18 17:28 CST 2009[RELATED]re: "...The device that Ken C refers to is an A/C "Idle Speed Increase" solenoid on the throttle body idle speed adjuster...."
Hi Bruce.
Actually, the thing I referred to wasn't on the throttle body (that is, if you meant that literally).
In particularl, it was a small, plastic device that, per the instructions that came with it, was to be installed on the firewall, spliced into a vacuum hose (I can't remember which) on the B21F of an '80. It also needed power from splicing into the wire energizing the A/C compressor's clutch.
It was from a TSB campaign to address complaints of customers that their idle was poor when they put on the A/C.
Best regards,
Ken
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SAVE That doesn't apply to the '84-on cars -- you don't have one .... 200
posted by Ken C on Sat Jul 4 18:56 CST 2009
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last visit: Wed Nov 18 17:28 CST 2009[RELATED]Yes, I had the device (I called it an idle speed compensator), that needed a wire from the A/C compressor, on my old '80 B21F.
It actually worked great. Before I installed it (it was an optional part from the parts counter), my idle would bog down whenever the A/C compressor cycled on -- it almost died, in fact. But after installing the thing, everytime the compressor cycled on the idle would be "goosed" a bit, just enough to compensate, and the net effect is that the idle remained somewhat steady (in fact, it increased very slightly, ~50rpm) when the compressor engaged.
That said, by my '83 B23F, this nifty device was no longer needed. The ECU increases idle to compensate.
Bottom line, you don't even have the device in your car.
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SAVE Where is the Constant Idle Speed Control Unit located on my '84 240 w/B23? 200
posted by
goatman
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Fri Jul 3 21:10 CST 2009
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last visit: Thu Oct 1 06:25 CST 2009[RELATED]Hello,
The idle control is operated by the engine control computer LH-Jetronic.
Goatman
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SAVE Where is the Constant Idle Speed Control Unit located on my '84 240 w/B23? 200
posted by volvo245kit on Fri Jul 3 21:28 CST 2009
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last visit: Wed Nov 18 20:24 CST 2009[RELATED]Are you talking about the ECU? If so, then why do they show item # 214 on page 390-22 section K4 in the Bentley and also item #131 on page 390-23 section M1? According to this diagram these are 2 different components. Thanks, Charles
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SAVE Where is the Constant Idle Speed Control Unit located on my '84 240 w/B23? 200 1984
posted by
sdewolfe
on
Sat Jul 4 04:41 CST 2009
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last visit: Sat Nov 21 06:01 CST 2009[RELATED]Howdy Charles,
Goatman is correct, the 1984 B23 does not have a separate Constant Idle Speed circuit.
Go to www.k-jet.org and get a copy of TP30427-1, LH-Jetronic Green Book. It shows every component in the system and where to find it.
In that book you will find that pin 16 of the ECU monitors the A/C panel switch. There should be a red wire connected between the two.
--
Mr. Shannon DeWolfe -- I've taken to using mister because my name misleads folks on the WWW. I am a 53 year old fat man. ;-)
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SAVE Where is the Constant Idle Speed Control Unit located on my '84 240 w/B23? 200
posted by
goatman
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Sat Jul 4 03:25 CST 2009
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last visit: Thu Oct 1 06:25 CST 2009[RELATED]Hi,
I don't own a Bentley manual, but I know without a doubt that the idle motor circuit is controlled directly by the ECU,
There are idle control units in K-Jetronic models.
Goatman
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SAVE Where is the Constant Idle Speed Control Unit located on my '84 240 w/B23? 200
posted by volvo245kit on Sun Jul 5 18:56 CST 2009
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last visit: Wed Nov 18 20:24 CST 2009[RELATED]Hi, I got to thinking about what you all were telling me and I looked at the wiring diagram again and found that they do show that the ('92 green) wire connects to terminal #16 on the ('84's)ECU. The ('92 gray/red) wire connects to the ('84 red) wire on the back of the round connector that goes on the back of the instrument cluster. The diagram gives 2 options as to where the red wire goes. One was to the CIS cont. unit (if equipped) and the other is to that connector. So I got it wired up now. Thanks to everyone here for all of your help. I'd be lost withou you. Charles
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