COMPONENT TESTING

1. Unplug the ISCM position sensor connector.
2. Measure the resistance between terminals 2 and 3, which should be between 4–6 kilohms.
3. Hook a 6V DC power source up between terminals 1 and 2 of the ISCM harness connector, and then measure the resistance between terminals 3 and 6 of the ISCM position sensor connector when the ISCM is activated (caused to expand and contract). The resistance should decrease smoothly as the ISCM plunger contracts.

   WARNING
   Apply only a 6V DC or lower voltage source. Application of higher voltages could cause a locking of the servo gears.

4. If there is a deviation from the standard value, or if the change is not smooth, replace the ISCM assembly.

   Fig. 1: The testing of the ISCM position sensor component — 2.4L engines