Pcm Function [13B-Msp]; Function List; Pcm Construction/Operation; Air Fuel Ratio (A/F) Sensor Function [13B-Msp] - Mazda RX-8 2009 Service Highlights

PCM FUNCTION [13B-MSP]

Function List

The control descriptions are as shown below.
Function
Main relay control
Drive-by-wire control
Drive-by-wire relay control
Sequential dynamic air intake
system (S-DAIS) control
Fuel injection control
Fuel pump control
Fuel pump speed control
Ignition timing control
Secondary air injection
control
Evaporative purge control
Metering oil pump control
Oil pressure control
A/F sensor heater/ HO2S
heater control
A/C cut-off control
Electrical fan control
Starter cut-off control
Generator control
CAN
End Of Sie
PCM CONSTRUCTION/OPERATION [13B-MSP]
Located in front area of the engine compartment.
120-pin connector is used for the PCM.
2BE 2BA2AW2AS2AO2AK 2AG 2AC 2Y 2U 2Q 2M
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z 2V 2R 2N
2BG2BC 2AY 2AU2AQ2AM 2AI 2AE 2AA 2W 2S 2O
2BH 2BD 2AZ 2AV 2AR2AN 2AJ 2AF2AB 2X 2T 2P
End Of Sie

AIR FUEL RATIO (A/F) SENSOR FUNCTION [13B-MSP]

NG: HEATED OXYGEN SENSOR
The wide-range air/fuel ratio sensor, which can linearly detect the oxygen concentration (air/fuel ratio of the air-
fuel mixture) in the exhaust gas in all ranges, from lean to rich, is used on the A/F sensor.
A heater has been adopted on the A/F sensor, allowing stable detection of the oxygen concentration even when
the exhaust gas temperature is low.
End Of Sie
Revised 11/2008 (Ref. No. R321/08)
2009 Mazda RX-8 Service Highlights (3452–1U–08C)
CONTROL SYSTEM [13B-MSP]
Turns on the main relay according to requests from the controls, even when the ignition switch
is off.
Controls the drive-by-wire actuator to obtain the optimum throttle valve opening angle
according to the engine operation conditions.
Controls the drive-by-wire relay according to the ignition switch signal.
Controls the VFAD solenoid valve (with VFAD), SSV solenoid valve, VDI solenoid valve (13B-
MSP(high power)), and APV motor according to the engine speed condition.
Calculates the optimum fuel injection amount according to the engine conditions, and controls
injection time and injection timing of the injector.
Controls the fuel pump relay according to the eccentric shaft position sensor signal.
Controls fuel pump speed control relay according to the fuel amount required by the engine.
Controls timing of the energization applied to the ignition coils according to the engine
conditions.
Controls the secondary air injection solenoid valve and secondary air injection pump relay at
startup with the cold engine.
Controls the purge solenoid valve according to the driving condition.
The metering oil pump driver receives drive signals from the PCM to switch the internal ground
and supply battery voltage to metering oil pumps No.1 and No.2.
The amount of oil supplied to the metering oil pump is adjusted based on the engine operation
conditions to keep the oil pressure inside the metering oil pump constant.
Controls the A/F sensor heater and HO2S heater when cold.
Controls the A/C relay according to the driving condition.
Controls the cooling fan relays No.1 and No.2/No.3 and No.4/No.5 according to the engine
conditions.
Theft deterrence has been improved by controlling energization to the starter relay according to
an engine stop request signal from the immobilizer system.
Controls the energization applied to the generator field coil according to the engine operation
and electrical load conditions.
The PCM sends and receives signals to and from the CAN system related modules via CAN.
HARNESS SIDE CONNECTOR
2I 2E 2A
2J 2F 2B
2G 2C
2K
2H 2D
2L
Description
PCM
1BE 1BA 1AW 1AS 1AO1AK 1AG 1AC 1Y 1U 1Q 1M
1BF 1BB 1AX 1AT 1AP 1AL 1AH1AD 1Z 1V 1R 1N
1BG 1BC 1AY 1AU 1AQ1AM 1AI 1AE 1AA 1W 1S 1O
1BH1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X 1T 1P
id0140g1105300
01-40
id0140g1105400
1I 1E 1A
1J 1F 1B
1K 1G 1C
1L 1H 1D
am6zzw00000123
id0140g1256000
01-40–25