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MR2 Turbo OBD Port location and water temp gauge question

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Rizo
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2012/04/15 18:19:21 (permalink)
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MR2 Turbo OBD Port location and water temp gauge question

Hey guys, was wondering if a Gen 2 Mr2 has a factory OBD Port?
Reason Im asking is that I want to get a Blitz Touch BRAIN installed in my car to monitor water Temp
This is it here -
http://www.blitz-uk.co.uk/Product-318.aspx
OR
Does anyone know of a digital gauge for water temp that doesnt require the common practice of sticking a sensor under a cooling system hose at the clamp? Im not a fan of this as its all too easy to suck air into the cooling system on Mr2s.
Thanks
 
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    just_ace
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/15 18:25:53 (permalink)
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    no, mr2 doesn't have an OBD port, only has the diag box in the eng bay next to the MAP sensor.
     
     
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    just_ace
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/15 18:26:53 (permalink)
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    could remove the sensor for the stock dash temp gauge and fit one in there.
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    Rizo
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/15 19:38:10 (permalink)
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    Does the temp gauge have a separate sensor or does it share it with the ecu?
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    just_ace
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/15 19:56:09 (permalink)
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    temp gauge is the single blade/pin/wire sensor. ecu uses two 2 blade/wire/pin sensors, 1 for engine temp and 1 for Cold start injector.
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    Reddtarga
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/16 11:00:57 (permalink)
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    just_ace

    could remove the sensor for the stock dash temp gauge and fit one in there.

    +1
    Probably the best location.
    Stock sender location is pre-thermostat, so measures coolant temp inside the motor.

    With a coolant outlet hose sender location, because of the quick warmup circuit it would only measure temps after the thermostat is open.
    With a faulty thermo, your motor could be cooking and the gauge would not show it. 
     



    1990 ADM NA
     
     
     
     
     
     
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    just_ace
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/16 11:08:00 (permalink)
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    Also forgot there is a bung on the thermo housing, but as targa said, if the thermo isnt opening you wont know.

    Maybe relocate the dash gauge sende there so its not useless, and have the metred sender unit in the coolant outlet neck.
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    Rizo
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/16 18:36:46 (permalink)
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    Thanks guys, would you happen to know what kind of signal the dash temp sender gives out?
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    WIDEMR
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    Re:MR2 Turbo OBD Port location and water temp gauge question 2012/04/16 19:00:21 (permalink)
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    I believe its a thermistor, temp will be a resistance (measured in ohms), being 1 wire, it will be resistance to ground, i believe NTC (Negative Temperature Coefficient) meaning as temperature increases the conductivity rises (less resistance)  
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