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Home >> Ford >> 1991 >> Explorer 2D Utility, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 30, Check VRS+ For Open Circuit
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Test 30, Check VRS+ For Open Circuit

With key off and ECA disconnected, connect VR sensor tee to VR sensor and vehicle harness connector. Set DVOM to 20-k/ohm scale. Measure resistance between breakout box pins No. J31 (VRS+ S) and J35 (VRS+ E).

If resistance is less than 2025 ohms, go to next test. If resistance is greater than 2025 ohms, repair open circuit. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes.