Mazda Mazda6 Workshop Manual Supplement page 427

Electronic Control Item and Control
Control item
Shift control
Line pressure control
Revers inhibition control
Shift transient control
Feedback control
TCC control
N-D select control
Slope mode control
OBD system
Component Description (Electronic Control)
Part name
Input system TR switch
Input/turbine speed sensor
Intermediate sensor
Vehicle speedometer sensor
TFT sensor
Brake switch
Cruise control module (in cruise actuator) • When the cruise control is in use, the signal detects when the
M range switch
Up switch
Down switch
CAN signal
K2–12
AUTOMATIC TRANSAXLE
• Detects engine load condition and vehicle speed. Shifts to the best gear
position according to the programmed automatic shift diagram.
• Generates line pressure matching the engine load condition and driving
conditions. Optimizes line pressure for each shift. When the ATF
temperature is low, automatically optimizes line pressure for quick clutch
engagement.
• When the shift lever is shifted to R position while the vehicle is running
forward at approx. 30 km/h{19 mph} or more, the TCM turns the neutral
shift solenoid valve on and drains the low and reverse brake hydraulic
pressure. Due to this, the transaxle shifts to neutral.
• Adjusts transient hydraulic pressure according to engine load and
vehicle driving conditions when shifting using the pressure control
solenoid, 2-4 brake solenoid valve, the high clutch solenoid valve, and
each accumulator control valve.
• Temporarily lowers engine torque during shift (up and down) to improve
shift feel
• The lock timing for the reduction brake band is controlled by the control
of the reduction timing solenoid valve ON/OFF timing.
• The lock timing for the clutch brake is controlled by the control of shift
solenoid A, B, and C ON/OFF timing.
• Corrects clutch engagement pressure and timing on drain side to
compensate for changes in engine performance and changes in
transaxle
• Controls TCC according to the programmed TCC points
• When a driving range is selected from P/N, the fuel injection amount is
controlled to prevent fluctuation in engine speed.
• Changes the shift point to prevent frequent shifting up/down when
climbing hills
• Detects and/or memorizes failure of input/output part and transaxle
condition
Throttle position signal
Engine torque signal
(without torque down)
Engine torque signal (with
torque down)
Engine torque signal (loss
torque)
Torque reduced signal
Engine coolant
temperature signal
Engine speed signal
Battery OFF signal
4 wheel speed signal
Contents
• Detects selector lever ranges/positions
• Detects reverse clutch drum revolution speed
• Detects output gear revolution speed
• Detects parking gear revolution speed
• Detects the ATF temperature
• Detects the brake pedal depressed
difference between the target speed and actual speed
exceeds specification
• Detects selector lever shifted M range
• Detects up shift in M range
• Detects down shift in M range
• Input throttle opening angle from PCM
• Input engine torque from PCM
• Input engine torque from PCM
• Input engine loss torque from PCM
• Detects signals indicating torque down availability
• Input engine coolant temperature from PCM
• Input engine speed from PCM
• Detect negative battery cable disconnected
• Input wheel speed from ABS HU/CM or DSC HU/CM
Function