Mazda RX-8 2004 - Pcm Function; Function List

CONTROL SYSTEM
01–40–42
PCM FUNCTION
CHU014018880S01
Function List
• The control descriptions are as shown below.
End Of Sie
Function Description
Main relay control Turns on the main relay according to requests from the controls, even when the ignition switch
is off.
Drive-by-wire control Controls the drive-by-wire actuator to obtain the optimum throttle valve opening angle
according to the engine operation conditions.
Drive-by-wire relay control Controls the drive-by-wire relay according to the ignition switch signal.
Sequential dynamic air intake
system (S-DAIS) control
Controls the VFAD solenoid valve (13B-MSP (High Power)), SSV solenoid valve, VDI solenoid
valve, and APV motor (13B-MSP (High Power)) according to the engine speed condition.
Fuel injection control Calculates the optimum fuel injection amount according to the engine conditions, and controls
injection time and injection timing of the injector.
Fuel pump control Controls the fuel pump relay according to the eccentric shaft position sensor signal.
Fuel pump speed control Controls fuel pump speed control relay according to the fuel amount required by the engine.
Ignition timing control Controls timing of the energization applied to the ignition coils according to the engine
conditions.
Secondary air injection
control
Controls the secondary air injection solenoid valve and secondary air injection pump relay at
startup with the cold engine.
Metering oil pump control Controls the stepping motor in the metering oil pump according to the engine conditions.
Evaporative purge control Controls the purge solenoid valve according to the driving condition.
Heated oxygen sensor heater
control
Controls the heated oxygen sensor heater when cold.
A/C cut-off control Controls the A/C relay according to the driving condition.
Electrical fan control Controls the cooling fan relays No.1 and No.2/No.3 according to the engine conditions.
Generator control Controls the energization applied to the generator field coil according to the engine operation
and electrical load conditions.
Controller area network Communicates with the instrument cluster, ABS HU/CM or DSC HU/CM, EPS control module,
keyless control module, steering angle sensor TPMS control module and TCM via the CAN.