Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

IDLE SPEED CONTROL ACTUATOR
The idle speed control actuator is the double coil type and has two coils. The two coils are driven by separate driver stages in the ECM. Depending on the pulse duty factor, the equilibrium of the magnetic forces of the two coils will result in different angles of the motor. In parallel to the throttle valve, a bypass hose line is arrange, where the idle speed, actuator is inserted in.

Circuit Diagram:

Troubleshooting Procedures:

TROUBLESHOOTING HINTS
The MIL is ON or the DTC is displayed on the HI-SCAN under the following conditions;
- When the primary voltage side in ECM is in short or open circuit.
- The ignition closed loop control in ECM is out of order.
- Open or short circuit is observed in idle air control system when ignition switch is turned on.

Using Hi-Scan:

ACTUATOR INSPECTION
1. Disconnect the connector at the idle speed control actuator.




2. Measure the resistance between terminals.

Standard value
Terminal 3 and 2 : 15.0 - 16.20 Ohm
Terminal 1 and 2 : 17.0 - 18.2 Ohm [at 20 °C (68 °F)]

3. Connect the connector to the idle speed control actuator

Harness Inspection Procedures: