TRANSMISSION SYSTEM

• It is equipped with 2 wet clutches, clutch A and clutch B, and each clutch is engaged or released by the hydraulic piston.
• If there is no oil pressure, the return spring forces the piston to return, releasing the clutch.

• Each synchronizer is activated by its own shift actuator (hydraulic cylinder).
• Borg Warner type triple cone synchronizer is used for all the gear speeds.
• A friction material is affixed to the cone surface of the synchronizer to allow higher capacity than a normal cone made of copper alloy.
• The actuator control module is a unit integrated with the shift actuator and hydraulic control valve.

• It inputs the range position (P, R, N, A ⇔ M) and Auto/Manual range change switch signal to the TCM.
  
  
• It is connected to the parking device of the transmission with the control cable, and it locks the parking device only when the shift lever is shifted into the P position.

It inputs the switch signal of upshift or downshift to TCM.

1	: Paddle shifter (shift-down switch)
2	: Paddle shifter (shift-up switch)

It inputs the switch signal of R mode or SNOW mode to TCM.

         

Component			Function
Suction filter			Removes foreign matter contained in fluid and prevents them from entering the hydraulic circuit
Inline filter
Heat exchanger			Cools down fluid with the water-cooled cooler When the engine starts at low temperature, warms fluid quickly with heated coolant
Front control module	Oil pump		Sucks fluid accumulated in the oil pan to build up oil pressure in the circuit
	Valve	Line pressure valve	Controls the line pressure The line pressure is adjusted by the line pressure solenoid
		Clutch A solenoid valve	Controls the clutch pressure of clutch A/B
		Clutch B solenoid valve
		Lubricating flow valve	Controls the lubricating flow The lubricating flow is adjusted by the lubricating flow solenoid
		Clutch lubricating switching valve	Switches the lubricating distribution of the clutch.
	Pressure sensor	Clutch A pressure sensor	Detects the clutch pressure of clutch A/B
		Clutch B pressure sensor
Actuator control module	Valve	Axis A feed pressure valve	Controls the feed pressure of axis A/B Each feed pressure is adjusted by the axis A/B feed pressure solenoid
		Axis B feed pressure valve
		Shift solenoid valve 1	Controls 4 shift actuator pistons by combining ON and OFF of each shift solenoid valve and switching the sequence valve circuit
		Shift solenoid valve 2
		Shift solenoid valve 3
		Shift solenoid valve 4
		Sequence valve
	Pressure sensor	Line pressure sensor	Detects the line pressure

*1: For the combination of the solenoids, refer to the “Shift actuator operation list”.

*2: For the combination of the range sensors, refer to the “Shift lever position and range sensor output”.

Component			Function
Front control module	Valve	Line pressure solenoid valve	Controls the line pressure by the line pressure solenoid current
		Clutch A solenoid valve	Controls the clutch pressure of clutches A/B by the clutch A/B solenoid current
		Clutch B solenoid valve
		Lubricating flow solenoid valve	Controls the lubricating flow by the lubricating flow solenoid current
	Pressure sensor	Clutch A pressure sensor	Converts the clutch pressure of clutches A/B into voltage
		Clutch B pressure sensor
Actuator control module	Valve	Axis A feed pressure solenoid valve	Controls the feed pressure of axes A/B by the axes A/B feed pressure solenoid
		Axis B feed pressure solenoid valve
		Shift solenoid valve 1	Controls 4 shift actuator pistons by combining ON and OFF of each shift solenoid valve*1
		Shift solenoid valve 2
		Shift solenoid valve 3
		Shift solenoid valve 4
		Sequence solenoid valve
	Pressure sensor	Line pressure sensor	Converts the line pressure into voltage
	Position sensor	1st-Reverse position sensor 1	Converts each shift actuator position into voltage Two 1st-reverse position sensors with the same output (but the output characteristics are inverse) are installed for fail-safe
		1st-Reverse position sensor 1
		2nd-4th position sensor
		6th-Neutral position sensor
		3rd-5th position sensor
Wheel sensor	Clutch A speed sensor		Converts the clutches A/B speed into pulse
	Clutch B speed sensor
	Output shaft speed sensor		Converts the output shaft speed into pulse
Park position switch			When the parking position is locked, it is energized, and when unlocked, it is not energized
Fluid temperature sensor			Converts the oil pan oil temperature into electrical resistance
TCM			Controls the transmission system
Shift device	Range sensor	Range sensor No. 0	With 6 range sensors, the shift lever position is recognized*2
		Range sensor No. 1
		Range sensor No. 2
		Range sensor No. 3
		Range sensor No. 4
		Range sensor No. 5
	Auto/Manual range change switch		Inputs the Auto/Manual range change switch signal to TCM
	Shift lock solenoid		Lock or unlock is attained with 3 systems, the ignition switch signal, stop lamp switch signal and lock or unlock signal (TCM)
Set-up switch	R mode switch		Normally not energized, and energized by turning the set-up switch to R
	SNOW mode switch		Normally not energized, and energized by turning the set-up switch to SNOW
TCM relay			Perform the power supply to TCM

Shift actuator operation list –: No effect on operation

Shift actuator	Operation	Solenoid valve
		Sequence	Shift 1	Shift 2	Shift 3	Shift 4
6th-Neutral shift actuator	6th gear → N	ON	ON	OFF	–	–
	6th gear ← N		OFF	ON	–	–
2nd-4th shift actuator	2nd gear → N → 4th gear	OFF	ON	OFF	–	–
	2nd gear ← N ← 4th gear		OFF	ON	–	–
3rd-5th shift actuator	5th gear → N → 3rd gear	ON	–	–	OFF	ON
	5th gear ← N ← 3rd gear		–	–	ON	OFF
1st-Reverse shift actuator	1st gear → N → Reverse	OFF	–	–	ON	OFF
	1st gear ← N ← Reverse		–	–	OFF	ON

Shift lever position and range sensor output

Shift lever position	Range sensor
	No. 0	No. 1	No. 2	No. 3	No. 4	No. 5
P	ON	OFF	OFF	OFF	OFF	OFF
R	OFF	ON	ON	OFF	OFF	OFF
N	OFF	OFF	ON	ON	ON	OFF
A⇔M	OFF	OFF	OFF	OFF	ON	ON