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

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