Computers and Control Systems: Description and Operation

CONTROL SYSTEM





This is essentially the same as the 3.5L engine used in the previous model year MONTERO, but the following changes have been made.





System Block Diagram

FUEL INJECTION CONTROL
The fuel injection control is basically the same as that for the 3.5L engine installed in the previous model year MONTERO.





System Configuration Diagram

IDLE AIR CONTROL (IAC)
The idle air control is basically the same as that for the 3.5L engine installed in the previous model year MONTERO.





System Configuration Diagram

IGNITION TIMING AND DISTRIBUTION CONTROL
The ignition timing and distribution control is basically the same as that for the 3.5L engine installed in the previous model year MONTERO.





System Configuration Diagram

OTHER CONTROL FUNCTIONS
The following items are basically the same as those for the 3.5L engine installed in the previous model year MONTERO.
^ A/C condenser fan Control
^ Power Supply and Fuel Pump Control
^ Heated Oxygen Sensor Heater Control
^ A/C Compressor Clutch Relay Control
^ Air Flow Sensor Filter Reset Control
^ EVAP Emission Control
^ EGR Control

ON-BOARD DIAGNOSTIC
The powertrain control module (PCM) has been provided with the following functions for easier system inspection.
For details of each function, refer to the applicable service and/or diagnostic procedures.
^ Service Engine Soon/Malfunction Indicator Lamp function
^ Diagnostic Trouble Code function
^ Data List function
^ Actuator Test function