Actron GM Code Scanner CP9001 Manual do Utilizador descarregar pdf (Página 32)

conditions. This improves fuel

economy by eliminating power loss in

the torque convertor. The computer

energizes a solenoid to achieve lock-

up. Signals from the engine coolant

temperature, throttle position and

vehicle speed sensors are used.

 Transmission Control

Some transmissions have computer

controlled shifting. Two solenoids

mounted in the transmission are

energized singly, or in combination, to

select a gear ratio. The solenoids

direct the flow of fluid within the

transmission to cause the shift. The

computer uses throttle position,

vehicle speed, engine loading and

other sensor information to determine

the optimum shift performance. The

computer can also set the shift quality

- anywhere from harsh to smooth. This

is done using a “force motor” actuator

in the transmission to adjust the

internal fluid line pressure.

More information

The Glossary (Section 8) describes

various sensors and actuators used in

computer controlled engine systems.

You can learn more by reading these

definitions.

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Actron GM Code Scanner CP9001 Manual do Utilizador Página 32