3.
Connector the connector to the idle speed control actuator
The idle speed control actuator is the double coil type. 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 bypasshose line is arrange, where the idle speed, actuator is inserted in.
When the primary voltage side of the ECM is a shorted 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 onl.
Check item | Check condition | HI-SCAN display | Type |
Idle speed control actuator o Actuator | Start the engine | ISCA | Activate |
Disconnect the connector at the idle speed control actuator.
Measure the resistance between terminals.
Standard value Terminal 3 and 2 : 10.5 ~ 14Ω Terminal 1 and 3 : 10 ~ 12.5Ω [at 20°C (68°F)] |
Connector the connector to the idle speed control actuator
