2013-12-31

More on engine temperature

Given the consistent results I've got with my previous modification, I've dared a little more.
I fitted some cheap pipe insulators in the remaining slots of the radiator grill:


The lower insulator is kept in place by pressure from the license plate, while I fixed the upper one with a couple plastic ties.


I was worried this type of insulation will prevent the engine from refreshing and will cause it to overheat.
As a stress test, I drove for an hour on various medium/high speed roads and some steep hills.
Even though the weather was sunny and the ambient temperature was 7 degress, coolant temperature reached 90 degrees and didn't go any further.

2013-12-18

Covering the Yaris radiator

Low temperature causes higher fuel consumption, so I tried an old trick.
In a car accessory shop, I've found and old Fiat 127 radiator rubber cover. The owner was pleased to sell it to me at a discounted price, since he said nobody uses it anymore.
Colour and size are just fine for the Yaris.
I just had to cut some holes to fit 3 plastic cable ties to grab it to the rear mask.

There are even some windows that can be opened to regulate air flow in warmer days.

Results are encouraging.


2013-12-15

Yaris 12V again

It seems that even the older Yaris has a 12V clamp in the hood that can be used for jump starting the car.
According to this Spanish forum:
It's possible to use the highlighted connector in the HV fuse box that carries the +12V from the battery.
The bolt in the lower right corner can be used for the negative clamp.

http://mitoyotaprius.mforos.com/2042955/11364755-yaris-HSD-jump-start-clamps-in-the-hood/


Checking the 12V battery from the OBD port

The OBD port, located under the steering wheel, carries a +12V line from the battery.
It can be used to check battery charge without opening anything.
Just put your tester terminals on pins 4 and 16:


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