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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 29, Check VRS+ Shorted To VRS
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Test 29, Check VRS+ Shorted To VRS

With key off and ECA disconnected, disconnect VR sensor from vehicle harness connector. Set DVOM to 20-k/ohm scale. Measure resistance between breakout box pins No. J35 (VRS+ E) and J48 (VRS E).

If resistance is greater than 3 k/ohms, replace VR sensor. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes. If resistance is less than 3 k/ohms, repair short circuit. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes.