GENERAL INFORMATION

FUEL INJECTION CONTROL

IDLE SPEED CONTROL

SELF-DIAGNOSIS FUNCTION

• When an abnormality is detected in any of the sensors or actuators, the engine warning lamp illuminates to warn the driver.
  
• When an abnormality is detected in any of the sensors or actuators, a diagnosis code number corresponding to the problem which occurred is output.
  
• The RAM data relating to the sensors and actuators which is stored in the engine-ECU can be read using the M.U.T.-III. In addition, the actuator can be force-driven under certain conditions.
  

OTHER CONTROL FUNCTIONS

1. Power Supply Control
   When the ignition switch ON signal is input by the ignition switch, the engine-ECU turns ON the power transistor for controlling the engine control relay. As a result, current flows through the coil in the engine control relay, causing the relay switch to turn ON and supply power to the sensors and actuators.
   
2. Glow Control
   Refer to GROUP 16
   (Refer to , GROUP 16 - Glow System).
   
3. EGR Control
   Refer to GROUP 17
   [Refer to , GROUP 17 - Engine And Emission Control - Exhaust Gas Recirculation (EGR) System].
   
4. A/C Relay Control
   Turns the compressor clutch of the A/C ON and OFF.
   
5. Condenser Fan Motor Relay Control
   Controls the condenser fan motor relay based on the A/C switch, A/C load signal, engine coolant temperature and vehicle speed input signals.
   
6. PTC Heater Relay Control <Vehicle with PTC heater>
   The PTC heater is turned ON is accordance with the A/C operation at the engine cold state.
   

FUEL INJECTION SYSTEM DIAGRAM