Electronic Throttle Control (ETC), also called drive-by-wire, replaces the mechanical cable between accelerator pedal and throttle body. The ECU interprets driver demand and controls airflow through torque-based algorithms.

Обзор

The ECU reads accelerator pedal position (APP) sensors, calculates desired torque, then commands throttle position accordingly. This enables traction control, cruise control, and torque management integration.

Controlled Signals

• Accelerator pedal position (APP)
• Throttle position sensor (TPS)
• Throttle motor PWM
• Torque request pathways

Maps Involved

• Pedal-to-Throttle Maps
• Driver Wish Torque Maps
• Throttle Response Maps
• Limp Mode Throttle Limits
• Idle Speed Target Maps

Logic Sequence

APP Signal → Driver Wish Calculation
         ↓
Torque Arbitration (traction, stability, etc.)
         ↓
Throttle Position Target
         ↓
Closed-Loop Throttle Control

Calibration Objectives

• Linear, responsive throttle feel
• Smooth idle control
• Safe torque management

Calibration Strategy

• Modify pedal maps for more aggressive response
• Remove artificial throttle delays (“eco” modes)
• Maintain torque model consistency

Диагностика

• APP sensor correlation faults
• TPS range/performance faults
• Throttle motor faults

Best Practices

• Never defeat redundant sensor checks — they exist for safety
• Throttle tuning should match actual power increases