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Mazda CX-5 Service & Repair Manual: TCM [Fw6 A EL, Fw6 Ax EL]

Purpose/Function

Function Table


Control item

Main control content

Shift point control

Automatic shift control

(D position)

Driving mode

Normal mode

  • Mode selection during normal driving

  • Performs automatic shift corresponding to vehicle speed and accelerator pedal depression amount

Active Adaptive Shift (AAS) mode

  • Unnecessary shift up is suppressed for several seconds by maintaining the gear corresponding to the operation speed at which the accelerator pedal is released

  • The optimum gear on the low vehicle-speed side is selected and shift down is executed corresponding to the operation force at which the brake pedal is depressed

  • During cornering, shift up is suppressed in preparation for acceleration after cornering

  • In regions of high elevation, the optimum gear is selected corresponding to the environment

  • The slope is estimated in the TCM to select the appropriate gear for ascent and descent

High ATF temperature mode

  • Controls engine torque when the ATF temperature is high

Manual shift control

(M position)

  • When M position is selected, manual shifting is prioritized according to the driver’s shift up/shift down operation.

Shift pressure control

Line pressure control

  • Controls line pressure with high accuracy and fine control corresponding to engine load conditions and vehicle driving conditions

Direct electric shift control

  • Performs direct, electronic control of clutch engagement pressure appropriate to engine load conditions and vehicle driving conditions

Learning control

  • Learns engine performance changes and transaxle deterioration over time to optimally correct clutch engagement pressure

Torque converter clutch (TCC) control

  • Based on adoption of full range TCC control, active TCC control directly after acceleration from stop

  • By gradually engaging/disengaging TCC piston, shock during operation is reduced

  • Implements TCC control when accelerator pedal is fully closed for improved fuel economy and emission performance

Engine-transaxle integration control

  • Optimally controls engine output torque when shifting

  • Calculates optimum clutch engagement pressure according to engine output torque

On-board diagnostic system

  • Main part of transaxle control includes self-diagnosis function. In case of malfunction, automatic transmission warning light illuminates to alert driver, and DTC is stored in TCM

  • When transaxle malfunction is determined resulting from on-board diagnostic test, system control is switched to prevent any dangerous situation while driving


Construction


Block diagram


Operation

Correlation between control and input/output parts


TCM Configuration [Fw6 A EL, Fw6 Ax EL]
NOTE: The TCM is built into the control valve body. 1. Verify TCM configuration implementation necessity for replacement parts. Replacement part Conf ...

Torque Converter Clutch (TCC) Control Solenoid [Fw6 A EL, Fw6 Ax EL]
Purpose/Function The torque converter clutch (TCC) control solenoid adjusts the hydraulic pressure in the TCC control circuit based on the current demand from the TCM according to the veh ...

Other materials:

Active Command Modes Inspection [Blind Spot Monitoring (Bsm)]
1. Connect the M-MDS to the DLC-2. 2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS. a. Select “DataLogger”. b. Select “Modules”. c. Select “BSML” or “BSMR”. 3. Select the simulation items from the PID table. 4. ...

Control Valve Body Removal/Installation [Fw6 A EL, Fw6 Ax EL]
On-Vehicle Removal WARNING: A hot transaxle and ATF can cause severe burns. Turn off the engine and wait until they are cool. Using compressed air can cause dirt and other particles to fly out, causing injury to the eyes. Wear protective eyeglasses whenever using compressed ai ...

Air Cleaner Element Inspection
1. Remove the air cleaner element.. 2. Inspect the following items: Has the replacement interval past? Is the air cleaner element soiled, damaged, or bent? Are the air cleaner case and the air cleaner element correctly sealed? Is the correct air cleaner element inst ...

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