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Home >> Ford >> 1991 >> Explorer 4D Utility, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 35, Check For IDM Short In ECA
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Test 35, Check For IDM Short In ECA

With key off and ECA disconnected, set DVOM to 20-volt scale. Crank engine, and measure voltage between breakout box pins No. J30 (EDIS diagnostic cable IDM detector) and J7 (BAT -). If voltage is 4.5-6.0 volts, replace ECA. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes. If voltage is not 4.5-6.0 volts, go to next test.