Acura NSX 1991 Manual page 234

Main Menu
Drive By Wire System
System Description
The Drive By Wire System is an electronic throttle control system.
This system consists of the throttle valve control motor and Throttle Position (TP) sensor assembled in Throttle Body (TB),
the accelerator position sensor, and the Engine Control Module (ECM).
Drive By Wire System Functions:
Idle Control Function
When the engine is idling, the ECM controls the throttle valve control motor to maintain the proper idle speed according
to engine loads.
Acceleration Control Function
When the accelerator pedal is depressed, the ECM opens the throttle valve depending on the accelerator position sensor
signals.
Table of Contents
THROTTLE
VALVE
CONTROL
MOTOR
To THROTTLE
VALVE CONTROL
MOTOR RELAY