018CHA Automatic Transmission CVT Applicable To The 1.0B Gearbox Assembly Of Chery Tiggo 4Pro

Function: Belt-driven CVT with adaptive pressure control for 1.0L turbo engines (156Nm torque capacity).

Key Features:

• Pushbelt Design: Bosch Van Doorne-type steel bands (9mm width for compact packaging)

• Electronic Cooling Valve: Regulates fluid flow based on TCU temp readings

• Shift Logic: Simulates 7-step "stepped" ratios for driver familiarity

Failure Modes:

• Belt Slippage: Low pulley pressure (P17F0, often from clogged filter)

• Pulley Sensor Fault: Causes erratic ratio changes (P2817)

• Auxiliary Pump Wear: Start-stop system strain leads to delayed engagement

Critical Maintenance:

• Fluid: Chery CVT-J4 only (every 60k km)

• Adaptation Reset: Required after fluid service

Pro Tip: Monitor pulley ratio PID – deviation >8% from commanded indicates belt wear.