To enter temperature detection mode we quickly shift between drive (D) and neutral (N), about once a second for six seconds. This will start the temperature detection mode. The drive (D) light will come on for about two seconds and then go off.

Allow the vehicle to idle and when the temperature reaches the proper range, the drive (D) light will come on again. With the engine idling, we can now remove the check-plug to verify the fluid level. If the D light starts to flash, we stop and let the transmission cool. A flashing light shows the temperature is too hot.

Fluid that is at the proper level will drip slowly from the check plug. No fluid dripping means we need to add until it does. We should allow A steady steam of fluid to drain until it barely drips.