Deceleration

During deceleration, the following actions occur:

- The Throttle Position Sensor (TPS), Engine Speed Sensor and the Vehicle Distance (speed) Sensor inputs are used to control automatic transmission overdrive operation.
- If the coolant temperature is below 60°F (16°C), the automatic transmission will not be allowed to enter overdrive operation. Once the coolant temperature reaches 60°F (16°C), the coolant temperature switch will open.
- If the transmission thermo-switch is open, the transmission will not be allowed to be shifted into overdrive (automatic transmission). If the transmission thermo-switch opens while the transmission is in overdrive, then the transmission will be downshifted. The opening or closing of the transmission thermo-switch is dependant upon the temperature of the transmission fluid. The thermo-switch opens at 273°F (134°C), and closes when the transmission fluid drops to 240°F (116°C).
- If the air intake temperature is at or below 90°F (32°C), then the air temperature switch is closed, allowing voltage to flow to the KSB solenoid. When the intake air temperature increases above 90°F (32°C), the air temperature switch will open, DE-ENERGIZING the KSB solenoid.
- If the speed control system is being used, and the coast/set button is held, the ECU will only allow the vehicle to decelerate at a predetermined rate. If the coast/set button is released, while decelerating, the ECU will reset the speed control to the rate of speed the vehicle was traveling when the coast/set button was released.
- If the brakes are applied, the ECU will de-activate the speed control system.
- The ECU will turn on the Water-In-Fuel lamp if it receives a signal from the Water-In-Fuel sensor.