Mazda 626 Station Wagon, Workshop Manual

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ELECTRONIC CONTROL SYSTEM
ELECTRONIC CONTROL ITEM S AND CONTENTS
Item Content
Line pressure control • With linear type pressure control solenoid, adjusts to suitable line pressure for engine
load condition and vehicle driving condition
Shift control • Detects engine load condition and vehicle speed, and switches to the most suitable
gear position according to the preset shift diagram
• Selects HOLD mode by switching HOLD switch
• In D range, automatically switches between POWER and NORMAL modes according
to accelerator pedal depressing speed
Clutch pressure direct control
(Direct electric shift control)
• With duty-cycle type shift solenoids A, B, and C, directly performs electronic control
for clutch engagement pressure suitable for engine load condition and vehicle driving
condition
Feedback control • Performs real-time feedback correction for clutch engagment pressure to achieve
target shifts
• Performs optimal correction for clutch engagement pressure to reduce changes in
engine performance and/or elapsed transaxle
Engine-transaxle total control • Optimally controls engine output torque when shifting
• Operates optimal clutch engagement pressure corresponding to engine output torque
TCC control • According to preset TCC point, performs TCC operation via smooth TCC
Slope mode control • Changes the shift point to prevent frequent shifting up/down when climbing or
descending hills
On-board diagnostic system • Detects and/or memorizes failure of input/output part and transaxle condition
COMPONENT DESCRIPTIONS (ELECTRONIC CONTROL)
Part name
Function
HOLD switch • Selects driving modes (HOLD) and changes driving patterns
TR switch • Detects selector lever ranges/positions
TP sensor
• Detects throttle valve opening angle
Input/turbine speed sensor • Detects forward clutch drum (input) revolution speed
Input
VSS • Detects differential gear case (output) revolution speed
system
Brake switch • Detects use of service brake
TFT sensor • Detects the ATF temperature
ECT sensor • Detects the engine coolant temperature
CKP sensor
• Detects the engine revolution speed
MAF sensor
• Detects intake air amount
Linear type
Pressure control solenoid • Adjusts line pressure
Shift solenoid A • Controls clutch engagement pressure
Duty-cycle type Shift solenoid B • Controls clutch engagement pressure
Shift solenoid C • Controls clutch engagement pressure
Output
ON/OFF type
Shift solenoid D
• Switches hydraulic passages for bypass valve and 3—4 shift
valve
system
Shift solenoid E
• Switches hydraulic passages for low and reverse shift valve,
TCC, and control valve
HOLD indicator light
• By switching HOLD switch, illuminates to indicate that it is in
HOLD mode
• Flashes when failure is detected by diagnosis function
Speedometer signal
• Outputs vehicle speed signal to speedometer
K2-11