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12-13-2010
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#1 |
 
Join Date: Mar 2008
Location: Auburn, KY
Posts: 557
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Analog temp signal to dash
We just got done replacing the starter, coil packs, injectors, spark plugs and two new temp sensors. Started the engine and the didgital temp gauge works but the analog temp gauge just sits there and doesn't move. For some reason, I seem to remember that the temp sensor for the gauges runs off the one sensor but having a hard time finding it in the service manual. Is this true about the sensor or is another one at fault because I can't find the location for another one?
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12-13-2010
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#2 |
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Join Date: Jun 2010
Location: Lone Pine, CA
Posts: 580
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Re: Analog temp signal to dash
the analog guage sensor is located on the drivers side inj housing. if you replace the sensor as i did with one from autozone be mindfull that the guage might read different as mine did . i thought i had a real problem until i hooked up my scan tool and found that 180 deg. was now in the middle of the guage . if nachos isnt working you might just have not got the connection back on all the way . i dont know if it would effect the digital guage . i would call corey henderson he would know .
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12-13-2010
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#3 |
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Join Date: Mar 2008
Location: Auburn, KY
Posts: 557
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Re: Analog temp signal to dash
Okay. Are we talking about the two temp sensors inside under the plenum? I know about those. What my question is is what drives the analog gauge in the insturment cluster? I know that the bottom sensor feeds the digital gauge and the top one feeds the ECM. Where is the sensor that feeds the analog gauge in the cluster? I think that the digital sensor also feeds the analog one but can't find the proof that I need in the service manual.
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12-13-2010
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#4 | |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,157
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Re: Analog temp signal to dash
Quote:
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 Last edited by -=Jeff=-; 12-13-2010 at 04:02 PM. |
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12-13-2010
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#5 |
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Join Date: Jun 2010
Location: Lone Pine, CA
Posts: 580
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Re: Analog temp signal to dash
from what i understand each gauge is independant. the digital gauge is the one that goes to the ecm. and the analog just goes to the inst cluster. if they were interwired to each other then you wouldnt have the need for 2 sensors. the ecm deals with digital info. the analog or sweep gauges are a totally different deal dealing with resistance to get the reading
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12-13-2010
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#6 |
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Join Date: Jun 2010
Location: Lone Pine, CA
Posts: 580
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Re: Analog temp signal to dash
to clarify the analog sensor only feeds the gauge. the ccm and ecm cant convert analog readings info into usable info. they need digital info
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12-13-2010
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#7 |
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Join Date: Jun 2010
Location: Lone Pine, CA
Posts: 580
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Re: Analog temp signal to dash
it the same reason we have 2 oil pressure sensors . one on top is analog and the one thats a bitch to get to is the digital info for the computor
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12-13-2010
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#8 |
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Join Date: Mar 2008
Location: Auburn, KY
Posts: 557
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Re: Analog temp signal to dash
Believe it or not, I was told by a well respected Corvette ZR-1 type that the bottom sensor was the digital one for the dash. I knew that the other one was for the ECM but that does make sense since you would need a converter to change the information to read both. The service doesn't really clarify that point. I understood that the ECM is strictly digital but the info that I got from this guy was freaking out the understanding that I had about it.
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12-13-2010
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#9 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
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Re: Analog temp signal to dash
Quote:
BTW, ALL of the oil measurement sensors are analog, unless you want to call the low pressure switch "digital" in that it is a two-state device.  (None have A/D converters in them) The output of the pressure sensor runs the analog pressure gauge on the dash, but the feed is split off to an A/D converter before feeding the ECM.P. Last edited by Paul Workman; 12-13-2010 at 05:02 PM. |
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12-13-2010
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#10 | |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,157
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Re: Analog temp signal to dash
Quote:
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
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