Rav Motor Coolant Replacement

12 steps to replacing the motor coolant in the Rav4EV. Here is the image from the relevant pages of the shop manual for the proper specs.

1) Using a metric 17 open-end or box-end wrench remove the plug and drain the coolant in a pan. The plug is a bit hard to find (shown below with yellow stripe)- close/above to the car's frame. Because of that a socket won't work. This is one good sign that this car is an adaptation of an existing ICE-based chassis.


2) Close plug tightly according to specs

3) mix coolant with distilled water, 50/50 1.5 liters of each for a total of 3 liters. Capacity is 2.9 liters.

4) Open radiator cap and pour coolant until it tops.

5) Locate relay box (all-black box in middle of photo below) and open it (single rear latch needs to be pressed in, not out like the 2 front ones).


6) Remove relay (use a screwdriver to carefully open the latch on the right side of the relay)

7) Short pins 3-5. I used the leads of a 12V inverter and it worked OK.

8) The water pump will start as soon as the pins are shorted

9) Keep filling with coolant as pump recirculates. You will see small bubbles and the coolant level lowering. Keep filling to the max.

10) Turn of the pump off by removing the leads.

11) Place relay back and close cover

12) Close radiator cover. It's done.

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