P0507

DESCRIPTION
The Idle Speed Control (ISC) actuator has two coils that are driven by separate ECM driver stages. Depending on the pulse duty factor, the equilibrium of the magnetic forces of the two coils will result in different direction for the magnetic forces of the two coils which will result in different positions for the actuator. In parallel to the throttle valve, a bypass hose line is arranged where the SC actuator is inserted.





FAILURE CONDITIONS
The ECM will set a code and the MIL will turn on if for 15 seconds [for P0506] or 8 seconds [for P0507] the SC actuator driver circuit values and engine idle speed are not in agreement with values stored in the ECM during two driving cycles when the following conditions are met:

1. The ISC actuator passes idle air at a rate above 3.3 g/s. [for P0506] or 2.2 g/s [for P0507].
2. Engine speed deviation is below 100 rpm [for P0506] or 200 rpm [for P0507].
3. Vehicle speed is zero.
4. Engine coolant temperature is above 167 °F (75 °C).

This code indicates the idle speed control actuator and the engine do not agree with the ECM on the idle speed value.

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Part 2 Of 2:

TEST PROCEDURE





Mechanical problems are observed in the idle air control system