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#1 | ||
BUILT FORD TUFF
Join Date: Jan 2005
Location: Mackay QLD
Posts: 1,919
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As title says i am having trouble getting the temp guage to work in my ED XR8
I am running the AU T3 TE 50 engine and wiring in an ED XR8. I can find the wire going from the Temp sender to the ECU but there must be a wire going from the ECU to the Dash or BCM. I tried tapping straight into the wire at the ECU which is pin 38 but no good. I am not sure if the AU and ED use a different type of temp guage. I can not find anything on the AU BCM or Dash wiring showing a wire to run the temp guage. It shows a few wires on the Dash wiring saying to EFI section than on the ECU wiring it shows 2 wires going into the ECU but it does not say what they do. I can get the ED temp guage to work by grounding it and it will go to full hot so it works. Someone out there must know something about these dam temp guage wiring. I would hate to trouble shoot an AU with a temp guage problem. Any help would be a big help to my poor brain. Thanks Shane
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2015 FGX XR6 Turbo |
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#2 | |||
You can't stop the signal
Join Date: Nov 2005
Location: Behind a computer at work
Posts: 1,624
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Engine temp comes via serial communication from the ecu, which is then deciphered by the cluster.
Cheers
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#3 | |||
BUILT FORD TUFF
Join Date: Jan 2005
Location: Mackay QLD
Posts: 1,919
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Quote:
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2015 FGX XR6 Turbo |
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#4 | ||
Mopar/No Car
Join Date: Jan 2005
Location: Down the Obi..
Posts: 4,648
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Pretty sure AU temp gauges are just idiot lights - they only have "normal" and "overheat" functions - Try an EB sender in the AU block, I'd imagine the threads on the fitting would be the same.
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ColumnShift Media '72 Plymouth Scamp '80 Courier '13 Kawasaki ZX14-R '13 Berlina '92 Suzuki DR650 If you don't fight - You lose
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#5 | |||
You can't stop the signal
Join Date: Nov 2005
Location: Behind a computer at work
Posts: 1,624
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I think you could, but for that my suggestion for that would be to run a hidden au cluster or make a mutant ed/au cluster to run the temp.
But running a second water temp sensor is the easier solution. Actually thinking about this, can you have the ecu flashed to read a different temperature and tap off this sensor for the cluster E.g. the ED sensor may make the AU computer read 60 deg when it's 20 deg, but make the cluster work correctly. Have the computer flashed to adjust the cold start parameters, so while the absolute number is wrong, it is the right temp? Cheers
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#6 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Geelong, Victoria
Posts: 4,405
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The temp sensor should be the same ED to AU if they work the same as the I6 engine. The sensor is just a resistor that changes resistance with temp. EF and AU sensors look different, but the resistance at different temps is exactly the same -so I've got a AU2 engine in my EF, using the AU sensor, no problems. Wiring the sensor (2 wires), one wire goes to the ECU temp sensor input (you already found that one), the other wire goes to the sensor ground (all the sensors use the same ground wire). No need to worry about the signal between ECU and gauge, unless you have done something to the existing loom?
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#7 | |||
BUILT FORD TUFF
Join Date: Jan 2005
Location: Mackay QLD
Posts: 1,919
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Quote:
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2015 FGX XR6 Turbo |
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#8 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Geelong, Victoria
Posts: 4,405
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I'm not familair with the ED v8, I'm just trying to be helpful by thinking things through. I think you are saying that the ED V8 has 2 coolant temp sensors, one for the ECU, and another one just to run the dash temp gauge. If that's the case then yeh you may need another sensor like you said. That would mean you have a sensor connector somewhere not plugged into anything. All repair manuals will tell you what the coolant sensor resistances are at different temps, so easy to compare ED and AU sensors, to see if they are compatible.
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#9 | |||
BUILT FORD TUFF
Join Date: Jan 2005
Location: Mackay QLD
Posts: 1,919
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Quote:
Regards Shane
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#10 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Geelong, Victoria
Posts: 4,405
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No worries, let us know how you go. Just thinking if it would possible to use the one sensor for both the ecu and gauge, you would need to put diodes on both sensor wires, so that the current coming from the ECU and gauge can only go to earth, and not go back up the other sensor wire.
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