AE80F AUTOMATIC TRANSMISSION


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Torque Converter Assembly
    • Transmits the engine power to the transmission.

    • Increases engine torque.

    Oil Pump Assembly Provides oil pressure necessary for the transmission operation.
    No. 1 Clutch (C1) Connects the front planetary ring gear and rear sun gear.
    No. 2 Clutch (C2) Connects the intermediate shaft and rear planetary carrier.
    No. 3 Clutch (C3) Connects the front planetary ring gear and middle sun gear.
    No. 4 Clutch (C4) Connects the front planetary carrier and middle sun gear.
    No. 1 Brake (B1) Prevents the middle sun gear from turning either clockwise or counterclockwise.
    No. 2 Brake (B2) Prevents the rear planetary carrier from turning either clockwise or counterclockwise.
    No. 1 1-way Clutch (F1) Prevents the rear planetary carrier from turning counterclockwise.
    Planetary Gears Change the power transmission route in accordance with clutch and brake operation, and increase or decrease output shaft revolution accordingly.
    Shift Solenoid Valve SL1 (Shift Control Solenoid Assembly) Controls No. 1 clutch (C1) pressure.
    Shift Solenoid Valve SL2 (Shift Control Solenoid Assembly)
    • Controls No. 2 clutch (C2) pressure.

    • Controls No. 2 brake (B2) pressure.

    Shift Solenoid Valve SL3 (Shift Control Solenoid Assembly) Controls No. 3 clutch (C3) pressure.
    Shift Solenoid Valve SL4 (Shift Control Solenoid Assembly) Controls No. 4 clutch (C4) pressure.
    Shift Solenoid Valve SL5 (Shift Control Solenoid Assembly) Controls No. 1 brake (B1) pressure.
    Shift Solenoid Valve SLU (Lock Up Control Solenoid Assembly) Controls lock-up clutch pressure.
    Shift Solenoid Valve SLT (Line Pressure Control Solenoid Assembly) Controls line pressure.
    Shift Solenoid Valve SC1 (Transmission 3-way Solenoid Assembly) Switches the clutch apply valve.
    Shift Solenoid Valve SC2 (Transmission 3-way Solenoid Assembly) Switches the B2 relay valve.
    No. 1 ATF Temperature Sensor (Transmission Wire) Detects the ATF temperature.
    No. 2 ATF Temperature Sensor Measures the temperature of the ATF to the oil cooler.
    Transmission Revolution Sensor (NT) Detects the input speed of the transmission.
    Transmission Revolution Sensor (SP2) Detects the output speed of the transmission.
    Yaw Rate Sensor (Airbag Sensor Assembly)
    • Detects the vehicle's longitudinal and lateral acceleration.

    • Detects the vehicle's yaw rate.

    Park/Neutral Position Switch Assembly Detects the shift lever position (P, R, N, D).
    Transmission Floor Shift Assembly Transmission Control Switch
    • Detects when the shift lever is in S.

    • Detects the driver's upshift and downshift operations when the shift lever is in S.

    Shift Paddle Switch (Transmission Shift Switch Assembly)* Detects the driver's upshift and downshift operations when the shift lever is in D or S.
    Stop Light Switch Assembly Detects when the brake pedal is depressed.
    Combination Switch Assembly (Integration Control and Panel Assembly) Drive Mode Select Selects the drive mode (ECO/COMFORT, NORMAL/CUSTOMIZE, SPORT S or SPORT S+).
    ECT 2nd Start Mode Switch Switches the ECT 2nd start mode.
    Combination Meter Assembly Transmits the vehicle speed signal to the ECM.
    Combination Meter Assembly MIL Illuminates to inform the driver when the ECM detects a malfunction.
    Multi-information Display
    • Displays the shift range.

    • Displays the drive mode.

    • Displays the message when the ATF is at a high temperature.

    ECT 2nd Start Mode Indicator Light Illuminates when the combination switch assembly (ECT 2nd start mode switch) is pressed.
    Buzzer Sounds when downshift operation is rejected in S mode.
    TCM Controls each shift solenoid valve in response to a signal from each sensor and switch.
    ECM Controls engine output in response to signals from the TCM.

    *: Models with shift paddle switch (transmission shift switch assembly)

  2. SYSTEM CONTROL

    Electronic Control of Automatic Transmission
    Control Function
    Powertrain Cooperative Control Controls both the shift control and engine output control in an integrated way, achieving excellent shift characteristics and drivability.
    Shift Timing Control The TCM sends current to each shift solenoid valves based on signals from various sensors in order to shift the gears.
    Line Pressure Control Actuates the shift solenoid valve SLT (line pressure control solenoid assembly) to control the line pressure in accordance with information from the TCM and the operating conditions of the transmission.
    Clutch Pressure Optimal Control The shift solenoid valves SL1, SL2, SL3, SL4, SL5 (Shift Control Solenoid Assembly), SLT (line pressure control solenoid assembly) and SLU (lock up control solenoid assembly) precisely control the clutch pressure in accordance with the engine output and driving conditions of the transmission.
    Clutch to Clutch Pressure Control Controls the pressure that is applied directly to B1 brake and each clutch by actuating the shift solenoid valves SL1, SL2, SL3, SL4 and SL5 (Shift Control Solenoid Assembly) in accordance with the TCM signals.
    Coast Downshift Control To prevent engine speed from decreasing and thereby maintain fuel cut, the TCM performs downshifts before fuel cut ends.
    Lock-up Timing Control The TCM sends current to the shift solenoid valve SLU (lock up control solenoid assembly) based on signals from various sensors and engages or disengages the lock-up clutch.
    Flex Lock-up Clutch Control Controls the shift solenoid valve SLU (lock up control solenoid assembly), provides an intermediate mode for when the lock-up clutch is between on and off, and increases the operating range of the lock-up clutch to improve fuel economy.
    Multi-mode Transmission
    • The TCM appropriately controls the automatic transmission in accordance with the shift range position selected while the shift lever is in the S mode position.

    • When the shift lever is in D, the driver can select a desired shift range using the shift paddle switch (transmission shift switch assembly).*

    Artificial Intelligence Shift Control (AI shift Control) Based on the signals from various sensors, the TCM determines the road conditions and the intention of the driver. Thus, an appropriate shift pattern is automatically determined, thus improving driveability.
    ECT 2nd Start Control Enabling the vehicle to take off in the 2nd gear and thus make it easy to take off snowy, sandy or muddy terrain.
    Differential Protection Control When there is a large rotation difference between the left and right wheels, shifting will be prevented to protect the differential.
    ATF High Temperature Control When the ATF is at a high temperature, normal shifting characteristics will be changed to shifting characteristics which actively utilize the low gear range to prevent the oil temperature from rising further.
    Engine Stall Avoidance Control Engine stall avoidance control is engaged when the engine is started again after an engine stall.

    *: Models with shift paddle switch (transmission shift switch assembly)


    1. Line Pressure Control


      1. The line pressure is controlled by using the shift solenoid valve SLT (line pressure control solenoid assembly). Through the use of the shift solenoid valve SLT (line pressure control solenoid assembly), the line pressure is optimally controlled in accordance with the engine torque information, as well as with the internal operating conditions of the torque converter and the transmission. Accordingly, the line pressure can be accurately controlled in accordance with the engine output, traveling condition, and ATF temperature, thus realizing smooth shift characteristics and optimizing the workload of the oil pump.

        A01W7IBE03
    2. Clutch Pressure Optimal Control


      1. The TCM monitors the signals from various types of sensors, such as the transmission revolution sensor (NT), allowing the shift solenoid valve SL1, SL2, SL3, SL4, SL5 (Shift Control Solenoid Assembly), SLT (line pressure control solenoid assembly) and shift solenoid valve SLU (lock up control solenoid assembly) to minutely control the clutch pressure in accordance with engine output and driving conditions. As a result, smooth shift characteristics are achieved.

        A01W7WIE01
    3. Clutch to Clutch Pressure Control


      1. Clutch to clutch pressure control is used for shift control. As a result, shift control in the 2nd gear or above is possible without using the 1-way clutch, and the automatic transmission has been made lightweight and compact.

      2. Using the fluid pressure circuit, which enables the clutches and brakes (C1, C2, C3, C4 and B1) to be controlled independently, and the high flow SL1, SL2, SL3, SL4 and SL5 shift solenoid valves, which directly control the line pressure, the TCM controls each clutch and brake accordingly with the optimum fluid pressures and timings in accordance with the information transmitted by the sensors, and then shifts the gears. As a result, highly responsive and excellent shift characteristics have been achieved.

        A01W74IE01
    4. Powertrain Cooperative Control


      1. Through cooperative control with ETCS-i (Electronic Throttle Control System-intelligent) and ESA (Electronic Spark Advance), and electronic control of the engagement and release speed of the clutch and brake hydraulic pressures, excellent response and shift shock reduction have been achieved.

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    5. Coast Downshift Control


      1. The TCM performs downshift control to prevent the engine speed from decreasing, thus keeping fuel cut control operating for as long as possible. In this way, the fuel economy is improved.

      2. In this control, the transmission downshifts from 8th to 7th, 7th to 6th and then 6th to 5th before fuel cut control ends when the vehicle is decelerated in the 8th gear, so that fuel cut control continues operating. In addition, the TCM performs downshifting when the vehicle is decelerated both in the 6th and 7th gears.

        A01W7CME01
    6. Multi-mode Transmission


      1. The driver can select the desired gear range by moving the shift lever to "+" (forward) or "-" (backward) while the shift lever is in S. Also, the shift paddle switch (transmission shift switch assembly)* can be used to change the gear range while the driver is holding the steering wheel.

      2. Thus, the driver is able to shift gears with a manual-like feel.

      3. When the vehicle is being driven at a prescribed speed or higher, any attempt to shift to a lower range by operating the shift lever will not be executed, in order to protect the automatic transmission. In this case, the ECM sounds the buzzer in the combination meter assembly twice to alert the driver.

      4. When the shift lever is in D, the driver can momentarily select a desired shift range by operating the shift paddle switch (transmission shift switch assembly)*. Automatic shifting will be reinstated under the following conditions:


        • The vehicle has stopped.

        • The driver continues to push the shift paddle switch (transmission shift switch assembly)* in the "+" direction longer than 1 second.

        • The driver depresses the accelerator pedal longer than a predetermined length of time.


          • *: Models with shift paddle switch (transmission shift switch assembly)

            A01W7P6E02
    7. Lock-up Timing Control


      1. The TCM operates lock-up timing control in order to improve fuel economy performance.

        Figure 1. Lock-up Operating Range:

        A01W7UCE01
        Lock-up Timing Control Operation
        Gear Shift Position and Shift Range
        D, D8*, S8 D7*, S7 D6*, S6 D5*, S5
        1st X X X X
        2nd X X X X
        3rd X X X X
        4th X X X X
        5th
        6th -
        7th - -
        8th - - -

        ○: Operates

        X: Does not operate

        -: Not applicable

        *: Models with shift paddle switch (transmission shift switch assembly)

    8. Flex Lock-up Clutch Control


      1. During acceleration, partial control of the power transmission between the lock-up clutch and torque converter greatly boosts transmission efficiency in accordance with the driving conditions, improving fuel economy.

      2. Even when the vehicle is decelerating (the accelerator pedal is released), flex lock-up clutch control operates. As a result, the fuel-cut area is expanded and fuel economy is improved.

      3. By allowing flex lock-up clutch control to continue operating during gearshifts, smooth torque transmission is obtained. As a result, fuel economy and drivability are improved.

        A01W7WUE01

        Figure 2. Flex Lock-up Operating Range:

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        Flex Lock-up Timing Control Operation
        Gear Shift Position and Shift Range (Fixed Shift Range Mode)
        D, D8*, S8 D7*, S7 D6*, S6 D5*, S5
        1st X X X X
        2nd X X X X
        3rd X X X X
        4th X X X X
        5th
        6th -
        7th - -
        8th - - -

        Tech Tips

        ○: Flex lock-up clutch control operates.

        X: Flex lock-up clutch control does not operate.

        -: Not applicable gear

        *: Models with shift paddle switch (transmission shift switch assembly)

    9. Artificial Intelligence Shift Control (AI-shift Control)


      • AI-shift control determines optimal transmission control based on input signals and automatically changes the shift pattern. As a result, a high caliber of transmission operation is achieved.

      • AI-shift control includes road condition support control and a driver's intention support.

      • AI-shift control is performed with the shift lever in D, based on the accelerator pedal and brake operation data. AI-shift control will be canceled when the shift lever is moved to a position other than D.

      A01W7PME01

      1. Road Condition Support Control


        • The TCM identifies the throttle valve opening angle, accelerator pedal opening angle and vehicle speed to determine whether the vehicle is being driven uphill or downhill. Unnecessary upshift is restrained to automatically achieve optimal drive force at all times while driving uphill. Downshift is automatically conducted to achieve optimal engine brake force, while driving downhill.

        A01W73HE01
      2. Driver's Intention Support Control


        • Driver's intention support control is estimated based on the accelerator pedal operation, vehicle condition and a shift pattern that is well-suited to the driver is selected without operating the switch.


        1. Sudden Accelerator Pedal Release Control


          • When the accelerator pedal is released suddenly, the transmission is kept in gear as long as possible, which improves engine braking force.

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        2. Sudden Accelerator Pedal Depress Control


          • When the accelerator pedal is depressed suddenly, downshifting occurs earlier ensuring improved acceleration response.

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        3. Downshifting Control During Hard Braking


          • High engine braking force and good re-acceleration response have been achieved by actively downshifting during deceleration when hard braking is made.

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    10. Blipping Downshift Control


      1. The blipping downshift control regulates each clutch and brake using the clutch to clutch pressure control, allowing them to be engaged smoothly and disengaged quickly. In addition, fuel injection volume is increased and engine speed is boosted by the powertrain cooperative control, thus ensuring engine brake force. In this way, a smooth and quick downshift is achieved. In addition, further quick down-shifting has been available by directly controlling clutch pressure.

        Tech Tips

        When the ATF and engine coolant temperature is low, blipping down shift control will not be performed.

        A01W7X5E01
    11. Engine Stall Avoidance Control


      • When an engine stall has occurred, the TCM suspects an ON malfunction of the linear solenoid valve SLU (lock-up control solenoid assembly), and engine stall avoidance control may be engaged by release of the C1 clutch or C3 clutch when the engine is started again. While engine stall avoidance control is engaged, creeping does not occur after the engine is restarted, even when in the D, S, or R shift position.

      • Slowly stepping on the accelerator pedal until the vehicle starts to move with the brake off engages the clutch, which makes departure possible.

      • When the linear solenoid valve SLU (lock-up control solenoid assembly) is normal, running at a constant speed for a short while with the engine speed from 1000 rpm to 3000 rpm releases engine stall avoidance control. The control can also be released by using Techstream and implementing the diagnosis code deletion procedure for the TCM. Furthermore, it is possible to carry out the deletion procedure even without the diagnosis code being entered.

      • When the vehicle departs, and then the linear solenoid valve SLU (lock-up control solenoid assembly) malfunctions or the vehicle stops before the above-mentioned conditions are reached, engine stall avoidance control is not released, so again creeping does not occur.

      A01W79GE02
  3. FUNCTION


    1. Drive Mode Select Function


      1. The drive mode can be selected by operating the combination switch assembly (Integration Control and Panel Assembly) (drive mode select or ECT 2nd start mode switch).

      2. The selected drive mode will be shown on the multi-information display in the combination meter assembly.

        Characteristics of Drive Mode
        Drive Mode Outline
        Normal Mode Best for easy driving.
        COMFORT Mode
        ECO Mode Controls the driving force for superior fuel economy property, compared to NORMAL mode, making it possible low fuel consumption drive.
        SPORT S Mode Optimal for sporty driving through the improved acceleration and responsiveness by changing the shifting points of the transmission from those of the NORMAL mode and controlling the throttle positions.
        SPORT S+ Mode
        ECT 2nd Start Mode Allows the vehicle to start in the 2nd gear for providing an enough traction force at slippery road surfaces such as sands and snow.
        CUSTOMIZE Mode The CUSTOMIZE mode allows the driver to freely set modes to his/her preferable adjustments in each of the power train control (engine/transmission), chassis control (steering/suspension), and air-conditioning control, in addition to the "ECO," "COMFORT," "NORMAL," "SPORT S," and "SPORT S+" modes provided by default.
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        *1 Combination Switch Assembly (Integration Control and Panel Assembly) - -
        *a Drive Mode Select *b ECT 2nd Start Mode Switch
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        *a Multi-information Display *b ECT 2nd Start Mode Indicator Light
  4. CONSTRUCTION


    1. ATF Cooler


      1. The water cooled oil cooler cools down the ATF using the engine coolant, and is fitted on the lower of the radiator.

      2. The air cooled oil cooler cools down the ATF using the cooling fins which are provided on the cooler itself, and is fitted inside the radiator grille so that it can be exposed to the air directly while the vehicle is running.

        A01W7U8C01
        *1 Air Cooled Oil Cooler (Oil Cooler with Hose Assembly) *2 Water Cooled Oil Cooler (Built-in Radiator)
        A01W7BF ATF Flow (to Water Cooled Oil Cooler (Built-in Radiator)) A01W7PH ATF Flow (to Air Cooled Oil Cooler (Oil Cooler with Hose Assembly))
        A01W7FR ATF Flow (from Air Cooled Oil Cooler (Oil Cooler with Hose Assembly)) - -
    2. Torque Converter


      1. A compact, lightweight and high-capacity torque converter assembly is used. The torque converter supports lock-up clutch control, thus improving fuel economy.

        A01W73UC01
        *1 Lock-up Damper *2 1-way Clutch
        *3 Turbine Runner *4 Lock-up Clutch
        *5 Stator *6 Pump Impeller
    3. Oil Pump


      1. The oil pump is operated by the torque converter. It lubricates the planetary gear units and supplies operating fluid pressure for hydraulic control. The oil pump drive gear is continually driven by the engine via the pump impeller. The pump has sufficient capacity to supply the necessary fluid pressure throughout all speed ranges, as well as in reverse.

      2. The pump cover is made of aluminum to reduce weight.

      3. A pump cover with an integrated piston cylinder for the No. 1 brake (B1) is used.

        A01W7HRC01
        *1 Pump Body *2 Drive Gear
        *3 Driven Gear *4 Stator Shaft
        *5 Pump Cover - -
    4. ATF Filling Procedure


      1. An ATF filling procedure is used in order to improve the accuracy of the ATF level when the transmission is being repaired or replaced. As a result, the oil filler tube and the oil level gauge used in a conventional automatic transmission have been discontinued, eliminating the need to inspect the fluid level as a part of routine maintenance. For details about the ATF filling procedures, refer to the Repair Manual.

        A01W7HMC01
        *1 Refill Plug *2 Overflow Plug
        *a Oil Level - -
    5. Planetary Gear


      1. The gear train consists of 4 multi-plate clutches, 2 multi-plate brakes, a 1-way clutch, and 2 sets of planetary gears each consisting of a sun gear, a pinion gear and a ring gear.

      2. Gear noise has been reduced through the optimized gears including the number of teeth, arrangements, and contact surfaces.

        A01W7KYC01
        *1 No. 1 Brake (B1) *2 No. 4 Clutch (C4)
        *3 Front Planetary Gear Unit *4 Rear Planetary Gear Unit
        *5 No. 2 Clutch (C2) *6 No. 2 Brake (B2)
        *7 No. 1 1-way Clutch (F1) *8 No. 1 Clutch (C1)
        *9 No. 3 Clutch (C3) - -
        A01W74HC01
        *1 Input Shaft *2 Front Planetary Sun Gear
        *3 Front Planetary Ring Gear *4 Front Planetary Gear Unit
        *5 Intermediate Shaft *6 Rear Planetary Middle Sun Gear
        *7 Rear Planetary Ring Gear *8 Rear Planetary Gear Unit
        *9 Rear Planetary Rear Sun Gear *10 Output Shaft
        *11 Rear Planetary Short Pinion Gear *12 Rear Planetary Long Pinion Gear
        *13 Front Planetary Pinion Gear - -

        C1

        No. 1 Clutch

        C2

        No. 2 Clutch

        C3

        No. 3 Clutch

        C4

        No. 4 Clutch

        B1

        No. 1 Brake

        B2

        No. 2 Brake

        F1

        No. 1 1-way Clutch - -
    6. Centrifugal Fluid Pressure Canceling Mechanism


      1. The clutch engagement force during shift transmission is affected by the centrifugal fluid pressure that acts on the fluid inside the piston fluid pressure chamber (referred to as "chamber A"), in addition to the original clutch pressure regulated by the valve body. In order to eliminate the influence caused by the centrifugal fluid pressure, the canceling fluid pressure chamber (referred to as "chambers") is provided on the opposite side of chamber A to cancel out the centrifugal fluid pressure. As a result, the centrifugal fluid pressure canceling mechanism provides responsive, smooth shift transmission.

        A01W779C01
        *1 Piston *2 No. 4 Clutch (C4)
        *3 No. 3 Clutch (C3) *4 No. 1 Brake
        *a Chamber A *b Chamber B
      2. Chamber B is filled by fluid supplied to the shaft for lubrication. As a result of filling chamber B, the same amount of fluid pressure is present on both sides of the piston due to centrifugal force. This cancels the effects of fluid pressure on the piston caused by centrifugal force. Accordingly, it is not necessary to discharge the fluid through the use of a check ball, and highly responsive and smooth shifting characteristics are achieved.

        A01W7FFE01
        A01W7BF Target fluid pressure A01W7PH Centrifugal fluid pressure applied to chamber A
        A01W7FR Centrifugal fluid pressure applied to chamber B - -
    7. Transmission Valve Body


      1. The transmission valve body assembly consists of the upper and lower valve bodies and 9 shift solenoid valves.

        A01W7RWC01
        *1 Shift Solenoid Valve SLU (Lock Up Control Solenoid Assembly) *2 Upper Valve Body
        *3 Plate *4 Lower Valve Body
        *5 Shift Solenoid Valve SLT (Line Pressure Control Solenoid Assembly) *6 Shift Solenoid Valve SL1 (Shift Control Solenoid Assembly)
        *7 Shift Solenoid Valve SL4 (Shift Control Solenoid Assembly) *8 Shift Solenoid Valve SL2 (Shift Control Solenoid Assembly)
        *9 Shift Solenoid Valve SL5 (Shift Control Solenoid Assembly) *10 Shift Solenoid Valve SL3 (Shift Control Solenoid Assembly)
        *11 Shift Solenoid Valve SC1 (Transmission 3-way Solenoid Assembly) *12 Shift Solenoid Valve SC2 (Transmission 3-way Solenoid Assembly)
    8. Shift Solenoid Valves SL1, SL2, SL3, SL4 ,SL5 (Shift Control Solenoid Assembly), SLT (Line Pressure Control Solenoid Assembly) and SLU (Lock Up Control Solenoid Assembly)


      1. In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, shift solenoid valves SL1, SL2, SL3, SL4, SL5, SLU and SLT linearly control the line pressure and clutch and brake engagement pressure based on the signals from the TCM.

      2. The shift solenoid valves SL1, SL2, SL3, SL4 and SL5 are large flow linear solenoid valves that can supply more pressure than conventional ones. These shift solenoid valves control engagement elements by directly regulating the line pressure without using the pressure regulation valve or the pressure reduction valve. Thus, the number of valves and the length of the valve body fluid passage have been reduced, the shifting response has been improved and the shift shock has been minimized.

        Figure 3. Shift Solenoid Valve SL1, SL4 and SL5 (Shift Control Solenoid Assembly)

        A01W7X0E01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 4. Shift Solenoid Valve SL2 and SL3 (Shift Control Solenoid Assembly)

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        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 5. Shift Solenoid Valve SLU (Lock Up Control Solenoid Assembly)

        A01W7RSE01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 6. Shift Solenoid Valve SLT (Line Pressure Control Solenoid Assembly)

        A01W7RAE01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current
    9. Shift Solenoid Valves SC1 and SC2


      1. A 3-way solenoid valve is used for the shift solenoid valves SC1 and SC2.

      2. A filter is provided at the tip of the shift solenoid valves to further improve operational reliability.

        Figure 7. Shift Solenoid Valve SC1 (Transmission 3-way Solenoid Assembly)

        A01W7BME01

        Figure 8. Shift Solenoid Valve SC2 (Transmission 3-way Solenoid Assembly)

        A01W7AQE01
    10. Transmission Revolution Sensor


      1. This automatic transmission uses the transmission revolution sensor (NT) and Transmission Revolution Sensor (SP2). Thus, the TCM can detect the timing of the shifting of the gears and appropriately control the engine torque and hydraulic pressure in response to various conditions. These transmission revolution sensors are Hall type.

      2. The transmission revolution sensor (NT) detects the input speed of the transmission. The input shaft is used as the timing rotor for this sensor.

      3. The Transmission Revolution Sensor (SP2) detects the speed of the output shaft. The rear planetary ring gear is used as the timing rotor for this sensor.

      4. The Hall type transmission revolution sensor consists of a magnet and Hall IC. The Hall IC converts the changes in the magnetic flux density that occur through the rotation of the timing rotor into an electric signal, and outputs the signal to the TCM.

        A01W7LYC01
        *1 Input Shaft *2 Transmission Revolution Sensor (NT)
        *3 Transmission Revolution Sensor (SP2) *4 Rear Planetary Ring Gear
    11. ATF Temperature Sensor


      1. The No. 1 ATF temperature sensor is installed in the transmission valve body assembly for direct detection of the fluid temperature.

      2. The No. 1 ATF temperature sensor is used for the revision of clutch and brake pressures to maintain a smooth shift quality every time.

        A01W7DJC01
        *1 Transmission Valve Body Assembly *2 No. 1 ATF Temperature Sensor
      3. The No. 2 ATF temperature sensor is measures the temperature of the ATF to the oil cooler.

        A01W7GUC01
        *1 No. 2 ATF Temperature sensor - -
    12. Park/Neutral Position Switch and Transmission Control Switch


      1. The park/neutral position switch assembly sends the C and NSW signals to the ECM.

      2. The park/neutral position switch assembly sends the PA, A, B, and C signals to the TCM.

      3. The transmission control switch is installed inside the transmission floor shift assembly to detect the S mode position and to inform the ECM.

      4. The transmission control switch detects whether the shift lever is in D or S, and detects the operating conditions of the shift lever "+" (forward) or "-" (backward) when the shift lever is in S, and sends signals to the ECM.

      5. The shift paddle switch (transmission shift switch assembly) is installed in the steering wheel. The ECM detects the operation of the shift paddle switch (transmission shift switch assembly) "+" (upshift) or "-" (downshift) when the shift lever is in D or S.*


        • *: Models with shift paddle switch (transmission shift switch assembly)

          A01W7LFE02
  5. OPERATION


    1. Transmission Power Flow

      Operating Condition of Shift Solenoid Valves
      Shift Position, Shift Range and Gear Range Shift Solenoid Valve
      SL1 SL2 SL3 SL4 SL5
      P X X X
      R X X X X
      N X X X
      D, D8*, S8 1st X X
      2nd X
      3rd X X X
      4th X
      5th X X X
      6th X X X
      7th X X X X X
      8th X X X
      D7*, S7 1st X X
      2nd X
      3rd X X X
      4th X
      5th X X X
      6th X X X
      7th X X X X X
      D6*, S6 1st X X
      2nd X
      3rd X X X
      4th X
      5th X X X
      6th X X X
      D5*, S5 1st X X
      2nd X
      3rd X X X
      4th X
      5th X X X
      D4*, S4 1st X X
      2nd X
      3rd X X X
      4th X
      D3*, S3 1st X X
      2nd X
      3rd X X X
      D2*, S2 1st X X
      2nd X
      D1*, S1 1st X X X

      ○: On

      ●: In Accordance with Flex Lock-up

      X: Off

      *: Models with shift paddle switch (transmission shift switch assembly)

      Operating Condition of Shift Solenoid Valves
      Shift Position, Shift Range and Gear Range Shift Solenoid Valve
      SC1 SC2 SLU
      P X X
      R X X
      N X X
      D, D8*, S8 1st X X
      2nd X X
      3rd X
      4th X
      5th X
      6th X
      7th X
      8th X
      D7*, S7 1st X X
      2nd X X
      3rd X
      4th X
      5th X
      6th X
      7th X
      D6*, S6 1st X X
      2nd X X
      3rd X
      4th X
      5th X
      6th X
      D5*, S5 1st X X
      2nd X X
      3rd X
      4th X
      5th X
      D4*, S4 1st X X
      2nd X X
      3rd X
      4th X
      D3*, S3 1st X X
      2nd X X
      3rd X
      D2*, S2 1st X X
      2nd X X
      D1*, S1 1st X X

      ○: On

      ●: In Accordance with Flex Lock-up

      X: Off

      *: Models with shift paddle switch (transmission shift switch assembly)

      Operating Condition of Friction Engagement Components and 1-way Clutch
      Shift Position, Shift Range and Gear Range Clutch Brake 1-way Clutch
      C1 C2 C3 C4 B1 B2 F1
      P - - - - - - -
      R - - - - -
      N - - - - - - -
      D, D8*, S8 1st - - - - -
      2nd - - - - -
      3rd - - - - -
      4th - - - - -
      5th - - - - -
      6th - - - - -
      7th - - - - -
      8th - - - - -
      D7*, S7 1st - - - - -
      2nd - - - - -
      3rd - - - - -
      4th - - - - -
      5th - - - - -
      6th - - - - -
      7th - - - - -
      D6*, S6 1st - - - - -
      2nd - - - - -
      3rd - - - - -
      4th - - - - -
      5th - - - - -
      6th - - - - -
      D5*, S5 1st - - - - -
      2nd - - - - -
      3rd - - - - -
      4th - - - - -
      5th - - - - -
      D4*, S4 1st - - - - -
      2nd - - - - -
      3rd - - - - -
      4th - - - - -
      D3*, S3 1st - - - - -
      2nd - - - - -
      3rd - - - - -
      D2*, S2 1st - - - - -
      2nd - - - - -
      D1*, S1 1st - - - -

      ○: Operates

      -: Does not Operates

      *: Models with shift paddle switch (transmission shift switch assembly)

      Figure 9. 1st Gear (D1, S1)

      A01W7VL
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 10. 1st Gear (D, D2 to D8, S2 to S8)

      A01W7WV
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 11. 2nd Gear (D, S)

      A01W7KD
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 12. 3rd Gear (D, S)

      A01W7N5
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 13. 4th Gear (D, S)

      A01W7WG
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 14. 5th Gear (D, S)

      A01W73M
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 15. 6th Gear (D, S)

      A01W7F4
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 16. 7th Gear (D, S)

      A01W78Y
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 17. 8th Gear (D, S)

      A01W7P4
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -

      Figure 18. Reverse Gear

      A01W7XM
      A01W7BF Output A01W7PH Input
      A01W7E5 Operates - -
  6. FAIL-SAFE


    1. This function minimizes the loss of operability when an abnormality occurs in a sensor or solenoid. For details, refer to the Repair Manual.

  7. DIAGNOSIS


    1. When the TCM detects a malfunction, it stores information related to the malfunction. Furthermore, the TCM illuminates the MIL in the combination meter assembly to inform the driver.

    2. The TCM will also store the Diagnostic Trouble Codes (DTCs) of the malfunctions.

    3. The DTCs can be read by connecting a Global TechStream (GTS) to the DLC3.

    4. For details, refer to the Repair Manual.