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Home >> Plymouth >> 1987 >> Colt Vista 4WD >> Repair and Diagnosis >> Engine Performance >> System >> MPI System >> Testing & Diagnosis >> Component Testing & Inspection >> Idle Switch

Idle Switch

  1. Disconnect ISC servo connector. Check for continuity between terminal No. 2 and body ground. See Fig 1 .
  2. If continuity exists when accelerator pedal is released, switch is okay. If no continuity exists when accelerator is depressed, switch is good. If out of specification, replace ISC servo assembly.
Fig 1: Checking Idle Switch
G61420
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