2018 Toyota Transmission Fluid Check Between 95 and 113 Degrees Fahrenheit.
John Sadler's Auto Repair John Sadler's Auto Repair
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 Published On May 18, 2022

Connect terminals CG (4) and TC (13) of the DLC3 using SST. Depress and hold the brake pedal. Start the engine. Slowly move the shift lever from P to S, then move the shift lever to P. While observing the D shift indicator on the combination meter, move the shift lever back and forth between N and D at an interval of less than 1.5 seconds for 6 seconds or more. Performing this this operation will cause the vehicle to enter automatic transmission fluid temperature detection mode. Check that the D shift indicator comes on for 2 seconds. Move the shift lever from N to P. Release the brake pedal. Remove SST from terminals 13 (TC) and 4 (CG). Allow the engine to idle until the automatic transmission fluid temperature reaches 35 to 45°C (95 to 113°F). The D shift indicator will come on again when the fluid temperature reaches 35°C (95°F) and will blink when it exceeds 45°C (113°F). Adjust the transmission fluid level when the "D" shift indicator is illuminated. Lift the vehicle. Remove the overflow plug and gasket from the automatic transmission assembly. Check the amount of automatic transmission fluid that comes out of the overflow hole. If the amount of automatic transmission fluid that comes out of the overflow hole is large, wait until the automatic transmission fluid flow slows and only drips come out. If no automatic transmission fluid comes out of the overflow hole, remove the refill plug and O-ring. Then add automatic transmission fluid to the refill hole until it flows out of the overflow hole. Wait until the automatic transmission fluid flow slows and only drips come out. Install a new gasket and the overflow plug to the automatic transmission assembly. Install a new O-ring and the refill plug to the automatic transmission assembly.



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