Idle Speed Control (ISC) Motor Operation Test
CAUTION:
DO NOT
apply more than 6 volts to ISC motor.
- Remove throttle body from intake plenum. Remove ISC motor from throttle body. Apply 6-volt source parallel to terminals No. 2 and 5 of ISC motor connector. See Fig 1 .
- Apply source ground lead to ISC motor connector terminals No. 3 and 6. Note slight movement of ISC motor plunger. Remove ground leads from terminals No. 3 and 6.
- Apply and remove source ground at terminals No. 1 and 6, 1 and 4, 3 and 4, and 3 and 6. Note slight movement of ISC motor plunger during each phase of test.
- Beginning at terminal No. 6, reverse grounding sequence following same procedure specified in step 2). If motor does not operate when grounding any of specified terminals, replace ISC motor.