Idle Speed Control Modes
WARNING: This page is about a different car, the 2009 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.
The ECM constantly monitors the coolant temperature sensor throughout all modes operation. After the engine starts and before the engine coolant reaches a temperature above 80°C (176°F), the ECM will deliver a pre-programmed quantity of fuel to each cylinder by cycling the fuel pressure regulator and the length of time each injector is actuated. When the engine coolant temperature rises above 80°C (176°F), the ECM will maintain idle speed at approximately 700 RPM by adaptively controlling fuel injection timing and quantity based on input signals received from the following sensors:
- Fuel Rail Pressure Sensor
- Boost Pressure Sensor
- Coolant Temperature Sensor
- Charge Air Temperature Sensor
- Intake Manifold Pressure Sensor
- Accelerator Pedal Sensor
- Crankshaft Position Sensor
- Fuel Temperature Sensor
- Transmission Shifter Position