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Old 08-08-2018, 05:09 PM   #1
SandJA1
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Drives: 2007 2-Dr Hatchback
Join Date: Aug 2018
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Question Max/Min/Optimum Coolant temperature numbers for Torque (OBD2)?

Hello, I've searched to no avail for these numbers. I'd like to set up a gauge for the Torque app (obdii). So I just need to know if the numbers I have are the correct numbers and also the number for max temp..

From what I've found online,

- Engine is cold at <=130°F
- Ideal temp is 180°F
- No known maximum temp

What temp does the high temp indicator light go on?

Thank you for any help! I just got the Yaris, so I'm excited to set up all these analysis tools.
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Old 08-08-2018, 09:09 PM   #2
SirDigby
 
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i think the light comes on at 230F...
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Old 08-08-2018, 11:32 PM   #3
CoryM
 
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According to service manual; fan-on temp is 93C/199F (which is surprisingly low for a modern car). So the engine's ideal operating range is 180-199F. If you want to confirm, just look at the temp when the fan comes on (make sure HVAC is off).
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Old 08-08-2018, 11:38 PM   #4
CoryM
 
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"The engine coolant temperature indicator light turns off when the engine coolant temperature exceeds
55°C (131°F) and illuminates when the temperature decreases to below 45°C (113°F).
The engine coolant temperature warning light flashes when the engine coolant temperature reaches
117°C (242.6°F) and illuminates when the temperature exceeds 120°C (248°F). When the temperature
decreases to 119.5°C (247.1°F) while the warning light is illuminated, the warning light begins to flashing.
In addition, when the temperature decreases to below 116.5°C(241.7°F) the warning light turns off."
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