Overview

The Mercury Idle2 Control is designed to control small stepper idle motors. There are 2 types namely Type 1 for 4 coil common steppers mostly found with Toyota engines and Type 2 for Bi-Polar steppers mostly found on GM engines. This unit is micro-based and receives an open or close signal from the ECU. Idle control is done in loop mode by the ECU. It is used as an add-on to expand the ECU’s outputs.

Engines do Idle Control in different ways. The main types are Throttle by Wire (TxW), Idle Valve solenoid type and Idle Stepper Valve. TxW uses a complete controller. Idle Valve solenoid types can be controlled directly from the ECU. Idle Stepper valves require a Stepper Idle controller which is a standalone controller to do reverse and forward with only 1 wire connection from the ECU. This will not overload the ECU tasks and outputs required.

The ECU has the feature to control different types of idle motors found on an engine. Before adjusting the idle control settings, you need to select which type of valve or stepper is on the engine. Note: The stepper types idle motor (4 to 6 wire), require the external electronic driver. Also, note that the electronic unit differs between the 4 Wire bipolar type motor and the 6 Wire common supply type motor.