Mazda CX-5 Service & Repair Manual: Torque Converter Clutch (TCC) Control [Fw6 A EL, Fw6 Ax EL]
Outline
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For TCC control, a newly developed, full range TCC control has been adopted. The TCC range has been significantly widened by having the smoothness unique to the torque converter during acceleration from a stop take precedence and actively controlling TCC directly after acceleration from a stop. Therefore, a contribution to low fuel consumption and vehicle operability with a direct feel have been achieved.
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Lower fuel consumption and improved emission performance have been achieved by performing the TCC control during deceleration with the accelerator pedal fully closed and by fuel-cut during TCC.
Construction
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The TCC mechanism consists of a torque converter clutch, TCC piston, and a damper which are installed inside the torque converter.
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A multi-plate type torque converter clutch has been adopted for improved durability. Also, by reducing the size of the clutch diameter, improved handling is achieved by the ability to respond to the precise control by the full range TCC.
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Vibration during TCC engagement is suppressed by the improved damper performance.
Operation
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TCC engagement
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A current signal is sent from the TCM to the TCC control solenoid during TCC engagement. At the same time, the TCC piston engagement pressure is gradually increased.
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As a result, the TCC piston is pressure-bonded to the TCC clutch slowly to perform smooth TCC engagement.
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TCC release
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A current signal is sent from the TCM to the TCC control solenoid during TCC release. At the same time, the TCC piston engagement pressure is gradually drained.
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As a result, the TCC piston releases the TCC clutch slowly to release the TCC smoothly.
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Inhibition of TCC control
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If any one of the following conditions is met, the torque converter clutch control is inhibited.
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TCC solenoid malfunction
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ATF temperature is specification or less
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Engine speed signal is specification or less
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Turbine shaft speed is specification or less
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Other than D/M position
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 ...
Torque Converter [Fw6 A EL, Fw6 Ax EL]
Purpose/Function
By use of an optimized torus shape (wing) matching the output characteristics
of the engine, the torque converter achieves efficient force transmission and
reduced fuel c ...
Other materials:
Manual Transaxle Oil Replacement [C66 M R]
1. Park the vehicle on level ground.
2. Remove the front under cover No.2..
3. Remove the drain plug and gasket, and drain the manual transaxle oil.
4. Install a new gasket and the drain plug.
Tightening torque
39—59 N·m {4.0—6.0 kgf·m, 29—43 ft·lbf}
5. Remove the ...
Front Sash Molding Removal
WARNING:
Using a utility knife with bare hands can cause injury. Always wear gloves
when using a utility knife.
1. Using a utility knife, carefully remove the double-sided adhesive tape in
the locations shown below.
CAUTION:
When removing the double-sided adhesive tape, ...
Lights On Indicator Light
Purpose
Notifies the user that the TNS or the headlights (LO) are on.
Function
Illuminates when the illumination conditions for the TNS, headlights (LO),
or parking lights are met.
When the instrument cluster receives the TNS malfunction signal sent via
CAN communic ...
