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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test KE - Idle Speed Control (Bypass Air) >> Test KE: Step 9

Test KE: Step 9

9) Check ISC Circuit For Short to Power  Turn key off and wait 10 seconds. Leave breakout box installed. Leave ECA and ISC solenoid disconnected. Set DVOM on 200-k/ohm scale. Measure resistance by connecting DVOM negative lead to test pin No. 21 and positive lead to test pin No. 37. If reading is greater than 10 k/ohms, go to next step. If reading is 10 k/ohms or less, repair short circuit and remove breakout box. Reconnect all components and repeat QUICK TEST. If code or symptom is still present, replace ECA.