Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Hydraulic Flow: Notes
As the engine turns, the CVTF pump starts to operate. Transmission fluid (CVTF) is drawn through the CVTF strainer (filter) and discharged into the hydraulic circuit. Then, CVTF flowing from the CVTF pump flows to the pressure high (PH) regulator valve and becomes pressure high (PH) pressure. PH pressure flows to the pulley control valves and then to the pulleys.
The PCM actuates the solenoid valves to control hydraulic pressure shifting pulley ratio and engaging the start clutch.
Hydraulic Pressure Flow Circuit Diagram
| Port No. | Hydraulic Pressure | Port No. | Hydraulic Pressure |
|---|---|---|---|
| CC | Start Clutch Control | LUB | Lubrication |
| CCB | Start Clutch Control B | PH | Pressure High |
| COL | CVTF Cooler | PHC | Pressure High Control |
| CR | Clutch Reducing | RCC | Recirculation |
| DN | Driven Pulley | RI | Reverse Inhibitor |
| DNC | Driven Pulley Control | RVS | Reverse Brake |
| DR | Drive Pulley | SC | Start Clutch |
| DRC | Drive Pulley Control | SI | Shift Inhibitor |
| FWD | Forward Clutch | X | Drain |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.