Resistence Test

Fig. 9 Idle switch test.***UPDATED BY TSB 86-14-005 JUNE 1986:

1. Place ignition switch to Off position, then disconnect ISC servo electrical connector, Fig. 9.
2. Check motor coil resistance between terminals 1 and 4. ISC servo motor resistance should be 7 - 10 ohms.
3. If resistance is 0 ohms or abnormally large, motor coil has an open or short. Replace ISC servo assembly as required.
4. Ensure there is no continuity between terminals 1 or 4 and injection mixer body. If continuity is present, replace ISC servo assembly.