LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1990 >> Probe GL, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EEC-IV >> Idle Control System Tests >> ISC Motor (CFI)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ISC Motor (CFI)

  1. Turn key off and wait 10 seconds. Disconnect harness from DC motor. Using jumper wires, connect ISC positive (+) circuit of DC motor to battery positive (+) terminal. Connect ISC negative (-) circuit of DC motor to battery negative terminal for 4 seconds.
  2. Motor shaft should extend more than 2" (51 mm). Connect ISC (+) circuit of DC motor to battery negative terminal and ISC (-) circuit of DC motor to battery positive terminal for 4 seconds. Motor shaft should retract to less than 1 3/4" (44 mm). If motor shaft does not move in and out as indicated, replace DC motor.