Mazda X-5. Manual — part 34
CONTROL SYSTEM
01–40–9
01–40
ENGINE CONTROL SYSTEM RELATION CHART [LF]
E5U014000000N06
×: Applicable
Item
Input device
Neutral switch (MT)
×
×
×
×
×
×
CPP switch (MT)
×
×
×
×
×
ECT sensor
×
×
×
×
×
×
×
×
×
×
IAT sensor
×
×
×
×
×
×
×
×
CKP sensor
×
×
×
×
×
×
×
×
×
×
×
CMP sensor
×
×
×
TP sensor No.1, No.2
×
×
×
×
×
×
×
×
×
×
APP sensor No.1, No.2
×
×
×
×
MAF sensor
×
×
×
×
×
×
×
Front HO2S
×
×
Rear HO2S
×
MAP sensor
×
×
×
×
×
BARO sensor (Built into PCM)
×
×
×
×
×
KS
×
Ignition switch
×
×
×
×
TR switch (AT)
×
×
×
×
×
×
Brake switch No.1, No.2
×
×
×
×
A/C amplifier
×
×
×
×
×
Refrigerant pressure switch (high,
low)
×
×
×
×
×
Refrigerant pressure switch (middle)
×
×
×
Cruise control switch
×
PSP switch
×
Vehicle speed signal
×
×
×
×
×
×
Instrument cluster (Immobilizer
related information)
×
Instrument cluster
×
DSC HU/CM
×
ABS HU/CM or DSC HU/CM
×
Generator (Terminal P: stator coil)
×
×
×
Battery
×
×
×
×
×
×
TCM (AT)
×
×
×
MAIN RELA
Y CONTR
OL
DRIVE-BY
-WIRE CONTR
OL
V
ARIABLE INT
AKE AIR CONTR
OL
V
ARIABLE V
AL
VE TIMING
CONTR
OL
FUEL INJECTION CONTR
OL
FUEL PUMP CONTR
OL
ESA CONTR
OL
EV
APORA
TIVE PURGE CONTR
OL
EGR CONTR
OL
HO2S HEA
TER CONTR
OL
A/C CUT
-OFF CONTR
OL
ELECTRICAL F
AN CONTR
OL
ST
AR
TER CUT
-OFF CONTR
OL
GENERA
T
OR CONTR
OL
CAN
CONTROL SYSTEM
01–40–10
End Of Sie
Output device
Main relay
×
Fuel pump relay
×
A/C relay
×
Cooling fan relay No.1
×
Cooling fan relay No.2
×
Cooling fan relay No.3
×
Starter relay
×
Purge solenoid valve
×
EGR valve
×
Variable intake air solenoid valve
×
Throttle valve actuator
×
Front HO2S heater
×
Rear HO2S heater
×
OCV
×
TCM (AT)
×
Fuel injector
×
Ignition coil
×
Generator (Terminal D: field coil)
×
Instrument cluster
×
ABS HU/CM or DSC HU/CM
×
Keyless control module
×
Item
MAIN RELA
Y CONTR
OL
DRIVE-BY
-WIRE CONTR
OL
V
ARIABLE INT
AKE AIR CONTR
OL
V
ARIABLE V
AL
VE TIMING
CONTR
OL
FUEL INJECTION CONTR
OL
FUEL PUMP CONTR
OL
ESA CONTR
OL
EV
APORA
TIVE PURGE CONTR
OL
EGR CONTR
OL
HO2S HEA
TER CONTR
OL
A/C CUT
-OFF CONTR
OL
ELECTRICAL F
AN CONTR
OL
ST
AR
TER CUT
-OFF CONTR
OL
GENERA
T
OR CONTR
OL
CAN
CONTROL SYSTEM
01–40–11
01–40
MAIN RELAY CONTROL OUTLINE [LF]
E5U014000000N56
• When the ignition switch is turned to the ON position, the main relay turns on.
• When the ignition switch is turned from on to off, the main relay turns on for a few minutes to activate the fully-
closed throttle learning function of the drive-by-wire control, the after-cleaning function of the electrical fan
control, and EVAP system leak detection function of the EVAP control system.
End Of Sie
MAIN RELAY CONTROL BLOCK DIAGRAM [LF]
E5U014000000N57
• The PCM controls the main relay on/off, based on commands from the ignition switch or the controls.
End Of Sie
MAIN RELAY CONTROL OPERATION [LF]
E5U014000000N58
• When the ignition switch is turned to the ON position, the main relay turns on and power is supplied to sensors
and devices.
• When the ignition switch is turned from on to off, a main relay on command signal is received the main relay
turns on and the following actions take place:
1. Throttle valve control: Fully closed throttle learning function (See 01–40–13 DRIVE-BY-WIRE CONTROL
OPERATION [LF].)
2. After-cooling function of the electrical fan control (See 01–40–34 ELECTRICAL FAN CONTROL
OPERATION [LF].)
3. EVAP system leak detection function of the EVAP control system (See 01–16–7 EVAPORATIVE
EMISSION (EVAP) CONTROL SYSTEM OUTLINE [LF].)
• When the on request signal from the controls stop, the main relay turns off.
End Of Sie
DRIVE-BY-WIRE CONTROL OUTLINE [LF]
E5U014000000N59
• The drive-by-wire control calculates the optimum target throttle valve opening angle at all ranges of engine
speeds and controls the throttle valve actuator.
• The drive-by-wire control includes idle speed control, accelerator control, traction control and cruise control.
Control List
End Of Sie
PCM
MAIN RELAY
IGNITION SWITCH
E5U140ZT5301
Control name
Control Outline
Idle speed control
• Controls the throttle valve opening angle during idling so that the idle speed is at the
target idle speed.
Accelerator control
• Controls the throttle valve opening angle according to the amount of AP depression.
Has a fully-closed throttle learning function for consistent setting of the optimum
throttle opening angle according to changes due to age deterioration.
Traction control
• Controls the throttle valve opening angle by torque up/down request signals from the
DSC HU/CM and TCM (AT).
Cruise control
• Sets the vehicle speed by operation of the cruise control switch and controls the
throttle valve opening angle so that it becomes close to the set vehicle speed.
CONTROL SYSTEM
01–40–12
DRIVE-BY-WIRE CONTROL BLOCK DIAGRAM [LF]
E5U014000000N64
• The PCM calculates the throttle valve opening angle matching the engine operation conditions from the
following input signals and sends a duty signal to the throttle valve actuator.
End Of Sie
REFRIGERANT
PRESSURE SWITCH
(MIDDLE)
MAF SENSOR
IAT SENSOR
MAP SENSOR
CKP SENSOR
ECT SENSOR
A/C AMPLIFER
REFRIGERANT
PRESSURE SWITCH
(HIGH, LOW )
GENERATOR
(TERMINAL P: STATOR COIL)
BARO SENSOR
NEUTRAL SWITCH (MT)
CPP SWITCH (MT)
BRAKE SWITCH
NO.1, NO.2
VEHICLE SPEED SIGNAL
PCM
TR SWITCH (AT)
TROTTLE VALVE
ACTUATOR
TP SENSOR NO.1, NO.2
APP SENSOR NO.1, NO.2
TCM (AT)
CRUISE CONTROL SWITCH
IGNITION SWITCH
DSC HU/CM
PSP SWITCH
E5U140ZT5002
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