Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Drive Range, Second Gear (Gen 2)

As vehicle speed increases and operating conditions become appropriate, the transmission control module (TCM) processes input signals from the automatic transmission input and output speed sensors, the throttle position sensor and other vehicle sensors to determine the precise moment to command ON the normally-low 26 pressure control solenoid and shift the transmission into Second gear. The manual valve remains in the Drive (D) position and line pressure continues to feed the drive fluid circuit.

2-6 Clutch Applies

26 Pressure Control (PC) Solenoid

The 26 PC solenoid is commanded ON, allowing actuator feed limit fluid to enter the PCS 26 clutch fluid circuit. PCS 26 clutch fluid is then routed through orifice #24 to the 2-6 clutch regulator valve.

2-6 Clutch Regulator Valve

PCS 26 clutch fluid, at the 2-6 clutch regulator valve, opposes 2-6 clutch regulator valve spring force and orificed 26 clutch fluid pressure to regulate drive fluid pressure into the 26 clutch circuit. 26 clutch fluid is then routed through orifice #22 to the 2-6 clutch assembly in the transmission case, and through orifice #4 to the spring end of the 2-6 clutch regulator valve.

2-6 Clutch

The 26 clutch fluid from the 2-6 clutch regulator valve is routed through the transmission case to the 2-6 clutch piston assembly. The 26 clutch fluid pressure moves the piston against 2-6 clutch spring force to apply the 2-6 clutch plates.

Accumulator

PCS 26 clutch fluid is also routed to an accumulator valve. The accumulator valve is used to dampen any pressure irregularities occurring in the PCS 26 clutch fluid circuit. This helps to control clutch apply fluid pressure and clutch apply feel.

Drive Range, Second Gear ?#8201;Gen 2/Hybrid

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Drive Range, Second Gear (Gen 1)
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As vehicle speed increases, the transmission control module (TCM) processes input signals from the automatic transmission input and output speed sensors, the throttle position sensor and other veh ...

Other materials:

Lock, Unlock Settings
Select and the following may display: Remote Unlock Light Feedback Remote Lock Light & Horn Feedback Remote Door Unlock Remote Unlock Light Feedback When on, the exterior lamps will flash when unlocking the vehicle with the RKE transmitter. Select Flash Lights or Lights Off. Remot ...

Odor Correction
Eliminating Air Conditioning Odor Odors may be emitted from the air conditioning system primarily at start up in hot, humid climates. The following conditions may cause the odor: Debris is present in the HVAC module. Microbial growth on the evaporator core When the blower ...

Camshaft Actuator System Description
Camshaft Actuator System Overview (1) Camshaft Actuator Vane (2) Timing Chain Sprocket (3) Engine Oil Pressure-For retarding the camshaft (4) Camshaft (5) Input Signals from Engine Sen ...

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