Chevrolet Equinox Service Manual: Drive Range, First Gear Automatic Transmission Unit
As the vehicle speed increases, the transmission control module-(TCM) receives inputsignals from the automatic transmission input and output speed sensors, throttle positionsensor and other vehicle sensors to determine the precise moment to deenergize or“turn off” shift solenoid-1 and command OFF the normally-high R1/456-pressure controlsolenoid-3.
Low & Reverse Clutch ReleasesShift Solenoid 1
When shift solenoid-1 is “turned OFF”, CSV2 enable fluid from the clutch select valve-2passes by the #2-ball check valve and enters the solenoid-1 fluid circuit. Solenoid-1fluid from the #2-ball check valve and TCC regulator valve is then routed to the solenoidwhere it exhausts.
Clutch Select Valve 2
Clutch select valve-2-(CSV2) enable fluid is exhausted from the clutch select valve-2and clutch select valve-2 spring force moves the valve to the released position. Withclutch select valve-2 in the released position, drive fluid from the manual valvepasses through the valve and enters the drive-1-6 fluid circuit. Drive-1-6 fluid thenfeeds the R1/456 and 35 reverse clutch regulatorvalves and the TCC regulator valve.
R1/456 Pressure Control Solenoid 3
The R1/456 pressure control solenoid-3 is commanded OFF allowing PCS R1/456 fluidfrom the R1/456-clutch regulator valve and 456-clutch boost valve to exhaust.
R1/456 Clutch Regulator Valve
R1/456-clutch regulator valve spring force moves the valve to exhaust the R1/456-clutchfeed circuit and allow drive-1-6 fluid to enter the PS4-fluid circuit. PS4-fluid isthen routed to the normally-closed pressure switch-4 and opens the switch. PS4-fluidis also routed to the #4-ball check valve and flows into the CSV2-latch fluid circuit.
#4 Ball Check Valve
PS4-fluid pressure seats the #4-ball check valve against the 456-clutch fluid circuit.PS4-fluid is then directed into the CSV2-latch fluid circuit and routed to the clutchselect valve-2. CSV2-latch fluid combines with clutch select valve-2 spring forceand holds the valve in this position during all 6-forward gear ranges.
#5 Ball Check Valve
Drive 1-6-fluid pressure seats the #5-ball check valve against the 35-reverse clutchfeed fluid passage. Drive 1-6-fluid is then directed into the 35R-supply fluid circuitwhich is routed to the #7-ball check valve and orifice-#16.
#7 Ball Check Valve
The 35R-supply fluid seats the #7-ball check valve against the 35R-feed fluid passageto force 35R-supply fluid through orifice-#16 before entering the 35R-feed circuit.The 35R-feed fluid is then routed to the 3-5-reverse clutch regulator valve.
Low and Reverse Clutch
Low and reverse clutch spring force moves the low and reverse clutch piston whichforces R1-fluid out. R1-fluid is routed to the clutch select valve-2 where it entersthe exhaust backfill circuit. The low and reverse clutch is in the released position.
Drive Range, First Gear
Drive Range, Sixth Gear Automatic Transmission Unit
As the vehicle speed increases, the transmission control module-(TCM) receives inputsignals from the automatic transmission input and output speed sensors, the throttleposition sensor and other vehicl ...
Drive Range, Third Gear (Gen 2/Hybrid) Automatic Transmission Unit
As vehicle speed increases and operating conditions becomeappropriate, the transmission control module (TCM) processes inputsignals from the automatic transmission input and output speedsensors, the t ...
Other materials:
Memory Seats
If equipped, memory seats allow two
drivers to store and recall their
unique seat positions for driving the
vehicle, and a shared exit position
for getting out of the vehicle. Other
feature positions may also be set,
such as power mirrors and power
steering wheel, if equipped. Memory
pos ...
