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ISC Servo Motor

  1. Turn ignition switch to "OFF" position. Disconnect ISC servo connector. Check motor coil continuity between terminals No. 1 and 4. See Figure . Resistance should read between 5 and 11 ohms. If resistance is zero ohms or abnormally large, open or short circuit exists in motor coil. Replace ISC servo assembly.
  2. Connect 6V DC (4 dry cells) between terminals No. 1 and 4 of the ISC motor connector, and check to be sure that the ISC servo operates. If not, replace ISC servo as an assembly.
CAUTION: Apply only a 6V or lower voltage. Application of higher voltage could cause locking of the servo gears.
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